./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:04:51,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:04:51,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:04:52,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:04:52,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:04:52,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:04:52,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:04:52,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:04:52,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:04:52,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:04:52,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:04:52,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:04:52,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:04:52,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:04:52,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:04:52,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:04:52,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:04:52,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:04:52,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:04:52,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:04:52,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:04:52,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:04:52,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:04:52,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:04:52,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:04:52,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:04:52,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:04:52,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:04:52,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:04:52,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:04:52,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:04:52,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:04:52,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:04:52,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:04:52,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:04:52,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:04:52,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:04:52,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:04:52,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:04:52,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:04:52,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:04:52,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:04:52,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:04:52,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:04:52,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:04:52,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:04:52,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:04:52,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:04:52,098 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:04:52,098 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:04:52,099 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:04:52,099 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:04:52,100 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:04:52,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:04:52,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:04:52,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:04:52,101 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:04:52,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:04:52,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:04:52,102 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:04:52,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:04:52,103 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:04:52,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:04:52,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:04:52,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:04:52,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:04:52,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:04:52,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:04:52,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:04:52,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:04:52,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:04:52,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:04:52,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:04:52,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:04:52,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:52,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:04:52,108 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:04:52,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:04:52,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:04:52,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:04:52,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:04:52,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:04:52,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:04:52,109 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_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-19 08:04:52,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:04:52,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:04:52,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:04:52,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:04:52,476 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:04:52,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-19 08:04:52,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/data/5cfb2b59e/4f84f4163d3d42b6a6e143a24aa3fbe3/FLAG8ff63a6c1 [2022-11-19 08:04:53,054 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:04:53,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-19 08:04:53,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/data/5cfb2b59e/4f84f4163d3d42b6a6e143a24aa3fbe3/FLAG8ff63a6c1 [2022-11-19 08:04:53,407 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/data/5cfb2b59e/4f84f4163d3d42b6a6e143a24aa3fbe3 [2022-11-19 08:04:53,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:04:53,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:04:53,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:53,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:04:53,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:04:53,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@616b2e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53, skipping insertion in model container [2022-11-19 08:04:53,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:04:53,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:04:53,654 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-19 08:04:53,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:53,684 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:04:53,710 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-19 08:04:53,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:53,743 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:04:53,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53 WrapperNode [2022-11-19 08:04:53,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:53,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:53,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:04:53,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:04:53,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,798 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 282 [2022-11-19 08:04:53,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:53,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:04:53,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:04:53,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:04:53,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,833 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:04:53,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:04:53,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:04:53,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:04:53,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (1/1) ... [2022-11-19 08:04:53,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:53,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:04:53,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:04:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:04:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:04:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:04:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:04:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 08:04:53,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 08:04:53,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 08:04:53,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 08:04:53,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:04:53,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:04:53,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:04:53,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:04:53,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:04:53,946 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 08:04:54,068 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:04:54,070 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:04:54,720 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:04:54,733 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:04:54,734 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 08:04:54,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:54 BoogieIcfgContainer [2022-11-19 08:04:54,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:04:54,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:04:54,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:04:54,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:04:54,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:53" (1/3) ... [2022-11-19 08:04:54,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170cc4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:54, skipping insertion in model container [2022-11-19 08:04:54,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:53" (2/3) ... [2022-11-19 08:04:54,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170cc4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:54, skipping insertion in model container [2022-11-19 08:04:54,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:54" (3/3) ... [2022-11-19 08:04:54,751 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-11-19 08:04:54,763 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 08:04:54,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:04:54,774 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:04:54,775 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:04:55,001 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-19 08:04:55,058 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:04:55,076 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 353 places, 374 transitions, 764 flow [2022-11-19 08:04:55,081 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 353 places, 374 transitions, 764 flow [2022-11-19 08:04:55,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 353 places, 374 transitions, 764 flow [2022-11-19 08:04:55,281 INFO L130 PetriNetUnfolder]: 28/372 cut-off events. [2022-11-19 08:04:55,282 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-19 08:04:55,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 372 events. 28/372 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 359 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 293. Up to 2 conditions per place. [2022-11-19 08:04:55,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 7452 [2022-11-19 08:05:12,444 INFO L134 LiptonReduction]: Checked pairs total: 7887 [2022-11-19 08:05:12,445 INFO L136 LiptonReduction]: Total number of compositions: 432 [2022-11-19 08:05:12,453 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 28 transitions, 72 flow [2022-11-19 08:05:12,469 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 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) [2022-11-19 08:05:12,487 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:05:12,493 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;@7740fb1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:05:12,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-19 08:05:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 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) [2022-11-19 08:05:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:05:12,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:12,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:12,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1874064559, now seen corresponding path program 1 times [2022-11-19 08:05:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:12,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806873836] [2022-11-19 08:05:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:12,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:05:13,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:13,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806873836] [2022-11-19 08:05:13,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806873836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:13,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:13,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:05:13,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260578821] [2022-11-19 08:05:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:13,142 INFO L87 Difference]: Start difference. First operand has 54 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-11-19 08:05:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:13,227 INFO L93 Difference]: Finished difference Result 55 states and 103 transitions. [2022-11-19 08:05:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2022-11-19 08:05:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:13,237 INFO L225 Difference]: With dead ends: 55 [2022-11-19 08:05:13,237 INFO L226 Difference]: Without dead ends: 55 [2022-11-19 08:05:13,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:13,241 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:13,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-19 08:05:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-19 08:05:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 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) [2022-11-19 08:05:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2022-11-19 08:05:13,272 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 18 [2022-11-19 08:05:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:13,273 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2022-11-19 08:05:13,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-11-19 08:05:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2022-11-19 08:05:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:05:13,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:13,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:13,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:05:13,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash 783042211, now seen corresponding path program 1 times [2022-11-19 08:05:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:13,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909004886] [2022-11-19 08:05:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:13,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:13,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:13,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909004886] [2022-11-19 08:05:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909004886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:13,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:13,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:13,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932310401] [2022-11-19 08:05:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:13,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:05:13,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:05:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:05:13,551 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-11-19 08:05:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:13,626 INFO L93 Difference]: Finished difference Result 56 states and 104 transitions. [2022-11-19 08:05:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:05:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2022-11-19 08:05:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:13,629 INFO L225 Difference]: With dead ends: 56 [2022-11-19 08:05:13,629 INFO L226 Difference]: Without dead ends: 56 [2022-11-19 08:05:13,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:05:13,632 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:13,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:13,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-19 08:05:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-19 08:05:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 55 states have internal predecessors, (104), 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) [2022-11-19 08:05:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 104 transitions. [2022-11-19 08:05:13,653 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 104 transitions. Word has length 19 [2022-11-19 08:05:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:13,653 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 104 transitions. [2022-11-19 08:05:13,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-11-19 08:05:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 104 transitions. [2022-11-19 08:05:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:05:13,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:13,656 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] [2022-11-19 08:05:13,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:05:13,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash 693703542, now seen corresponding path program 1 times [2022-11-19 08:05:13,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:13,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081637661] [2022-11-19 08:05:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:13,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:13,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:13,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081637661] [2022-11-19 08:05:13,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081637661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:13,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:13,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065458252] [2022-11-19 08:05:13,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:05:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:05:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:05:13,930 INFO L87 Difference]: Start difference. First operand 56 states and 104 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-19 08:05:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:14,003 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-11-19 08:05:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:05:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2022-11-19 08:05:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:14,008 INFO L225 Difference]: With dead ends: 57 [2022-11-19 08:05:14,008 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 08:05:14,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:05:14,012 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:14,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 08:05:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-19 08:05:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.875) internal successors, (105), 56 states have internal predecessors, (105), 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) [2022-11-19 08:05:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 105 transitions. [2022-11-19 08:05:14,025 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 105 transitions. Word has length 20 [2022-11-19 08:05:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:14,025 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 105 transitions. [2022-11-19 08:05:14,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-19 08:05:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 105 transitions. [2022-11-19 08:05:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:05:14,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:14,028 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] [2022-11-19 08:05:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:05:14,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -933701866, now seen corresponding path program 1 times [2022-11-19 08:05:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:14,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566148295] [2022-11-19 08:05:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:14,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:05:14,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:14,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566148295] [2022-11-19 08:05:14,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566148295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:14,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:14,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070700793] [2022-11-19 08:05:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:14,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:05:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:05:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:05:14,180 INFO L87 Difference]: Start difference. First operand 57 states and 105 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-11-19 08:05:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:14,248 INFO L93 Difference]: Finished difference Result 58 states and 106 transitions. [2022-11-19 08:05:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:05:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2022-11-19 08:05:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:14,249 INFO L225 Difference]: With dead ends: 58 [2022-11-19 08:05:14,249 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 08:05:14,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:05:14,251 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:14,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 08:05:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-19 08:05:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.8596491228070176) internal successors, (106), 57 states have internal predecessors, (106), 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) [2022-11-19 08:05:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 106 transitions. [2022-11-19 08:05:14,256 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 106 transitions. Word has length 21 [2022-11-19 08:05:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:14,258 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 106 transitions. [2022-11-19 08:05:14,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-11-19 08:05:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 106 transitions. [2022-11-19 08:05:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:14,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:14,263 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] [2022-11-19 08:05:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:05:14,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -251230383, now seen corresponding path program 1 times [2022-11-19 08:05:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411836706] [2022-11-19 08:05:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:14,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:16,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411836706] [2022-11-19 08:05:16,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411836706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:16,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:16,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861736283] [2022-11-19 08:05:16,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:16,156 INFO L87 Difference]: Start difference. First operand 58 states and 106 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:17,071 INFO L93 Difference]: Finished difference Result 84 states and 142 transitions. [2022-11-19 08:05:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:17,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:17,073 INFO L225 Difference]: With dead ends: 84 [2022-11-19 08:05:17,073 INFO L226 Difference]: Without dead ends: 79 [2022-11-19 08:05:17,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:05:17,074 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:17,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:05:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-19 08:05:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2022-11-19 08:05:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8253968253968254) internal successors, (115), 63 states have internal predecessors, (115), 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) [2022-11-19 08:05:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 115 transitions. [2022-11-19 08:05:17,078 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 115 transitions. Word has length 22 [2022-11-19 08:05:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:17,079 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 115 transitions. [2022-11-19 08:05:17,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 115 transitions. [2022-11-19 08:05:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:17,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:17,080 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] [2022-11-19 08:05:17,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:05:17,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash -97166913, now seen corresponding path program 2 times [2022-11-19 08:05:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:17,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045426776] [2022-11-19 08:05:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:18,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045426776] [2022-11-19 08:05:18,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045426776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:18,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:18,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:18,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780958868] [2022-11-19 08:05:18,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:18,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:18,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:18,531 INFO L87 Difference]: Start difference. First operand 64 states and 115 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:19,172 INFO L93 Difference]: Finished difference Result 128 states and 222 transitions. [2022-11-19 08:05:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:19,174 INFO L225 Difference]: With dead ends: 128 [2022-11-19 08:05:19,174 INFO L226 Difference]: Without dead ends: 123 [2022-11-19 08:05:19,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:05:19,175 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:19,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-19 08:05:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 67. [2022-11-19 08:05:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8484848484848484) internal successors, (122), 66 states have internal predecessors, (122), 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) [2022-11-19 08:05:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-11-19 08:05:19,180 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 22 [2022-11-19 08:05:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:19,181 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-11-19 08:05:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-11-19 08:05:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:19,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:19,182 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] [2022-11-19 08:05:19,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:05:19,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1593913367, now seen corresponding path program 3 times [2022-11-19 08:05:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:19,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25144619] [2022-11-19 08:05:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:19,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:20,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25144619] [2022-11-19 08:05:20,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25144619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:20,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:20,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467331241] [2022-11-19 08:05:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:20,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:20,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:20,395 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:20,827 INFO L93 Difference]: Finished difference Result 114 states and 205 transitions. [2022-11-19 08:05:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:05:20,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:20,829 INFO L225 Difference]: With dead ends: 114 [2022-11-19 08:05:20,829 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 08:05:20,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:05:20,830 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:20,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 08:05:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 70. [2022-11-19 08:05:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.8695652173913044) internal successors, (129), 69 states have internal predecessors, (129), 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) [2022-11-19 08:05:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2022-11-19 08:05:20,835 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 22 [2022-11-19 08:05:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:20,835 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2022-11-19 08:05:20,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2022-11-19 08:05:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:20,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:20,836 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] [2022-11-19 08:05:20,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:05:20,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1005901417, now seen corresponding path program 4 times [2022-11-19 08:05:20,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:20,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833223340] [2022-11-19 08:05:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:21,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:21,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833223340] [2022-11-19 08:05:21,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833223340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:21,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:21,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:21,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530717386] [2022-11-19 08:05:21,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:21,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:21,877 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:22,186 INFO L93 Difference]: Finished difference Result 111 states and 192 transitions. [2022-11-19 08:05:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:22,187 INFO L225 Difference]: With dead ends: 111 [2022-11-19 08:05:22,188 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 08:05:22,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:05:22,188 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:22,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 08:05:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2022-11-19 08:05:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 72 states have internal predecessors, (139), 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) [2022-11-19 08:05:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 139 transitions. [2022-11-19 08:05:22,198 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 139 transitions. Word has length 22 [2022-11-19 08:05:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:22,200 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 139 transitions. [2022-11-19 08:05:22,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 139 transitions. [2022-11-19 08:05:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:22,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:22,202 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] [2022-11-19 08:05:22,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:05:22,202 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -211358843, now seen corresponding path program 5 times [2022-11-19 08:05:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:22,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482244924] [2022-11-19 08:05:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:22,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:23,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482244924] [2022-11-19 08:05:23,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482244924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:23,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:23,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:23,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833898314] [2022-11-19 08:05:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:23,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:23,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:23,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:23,201 INFO L87 Difference]: Start difference. First operand 73 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:23,673 INFO L93 Difference]: Finished difference Result 105 states and 185 transitions. [2022-11-19 08:05:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:23,674 INFO L225 Difference]: With dead ends: 105 [2022-11-19 08:05:23,674 INFO L226 Difference]: Without dead ends: 95 [2022-11-19 08:05:23,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:05:23,675 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:23,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-19 08:05:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 73. [2022-11-19 08:05:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 72 states have internal predecessors, (136), 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) [2022-11-19 08:05:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 136 transitions. [2022-11-19 08:05:23,686 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 136 transitions. Word has length 22 [2022-11-19 08:05:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:23,687 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 136 transitions. [2022-11-19 08:05:23,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-19 08:05:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 136 transitions. [2022-11-19 08:05:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:23,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:23,689 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] [2022-11-19 08:05:23,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:05:23,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:23,690 INFO L85 PathProgramCache]: Analyzing trace with hash -8563091, now seen corresponding path program 6 times [2022-11-19 08:05:23,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:23,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760061089] [2022-11-19 08:05:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:25,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760061089] [2022-11-19 08:05:25,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760061089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:25,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:25,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:05:25,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936759498] [2022-11-19 08:05:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:05:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:05:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:05:25,011 INFO L87 Difference]: Start difference. First operand 73 states and 136 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:25,656 INFO L93 Difference]: Finished difference Result 109 states and 187 transitions. [2022-11-19 08:05:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:05:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:25,657 INFO L225 Difference]: With dead ends: 109 [2022-11-19 08:05:25,657 INFO L226 Difference]: Without dead ends: 104 [2022-11-19 08:05:25,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:05:25,658 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:25,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-19 08:05:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2022-11-19 08:05:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9) internal successors, (133), 70 states have internal predecessors, (133), 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) [2022-11-19 08:05:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 133 transitions. [2022-11-19 08:05:25,662 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 133 transitions. Word has length 22 [2022-11-19 08:05:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:25,662 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 133 transitions. [2022-11-19 08:05:25,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 133 transitions. [2022-11-19 08:05:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:25,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:25,663 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] [2022-11-19 08:05:25,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:05:25,663 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash -295201477, now seen corresponding path program 7 times [2022-11-19 08:05:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604035881] [2022-11-19 08:05:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:25,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:26,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:26,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604035881] [2022-11-19 08:05:26,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604035881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:26,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:26,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:05:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970048431] [2022-11-19 08:05:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:26,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:05:26,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:05:26,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:05:26,795 INFO L87 Difference]: Start difference. First operand 71 states and 133 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:27,242 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2022-11-19 08:05:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:27,244 INFO L225 Difference]: With dead ends: 94 [2022-11-19 08:05:27,244 INFO L226 Difference]: Without dead ends: 89 [2022-11-19 08:05:27,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:05:27,245 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:27,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-19 08:05:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2022-11-19 08:05:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 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) [2022-11-19 08:05:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 140 transitions. [2022-11-19 08:05:27,248 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 140 transitions. Word has length 22 [2022-11-19 08:05:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:27,249 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 140 transitions. [2022-11-19 08:05:27,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 140 transitions. [2022-11-19 08:05:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:27,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:27,252 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] [2022-11-19 08:05:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:05:27,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1990353989, now seen corresponding path program 8 times [2022-11-19 08:05:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:27,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305053132] [2022-11-19 08:05:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:28,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305053132] [2022-11-19 08:05:28,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305053132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:28,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:28,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:05:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931064693] [2022-11-19 08:05:28,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:28,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:05:28,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:05:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:05:28,303 INFO L87 Difference]: Start difference. First operand 74 states and 140 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:28,793 INFO L93 Difference]: Finished difference Result 115 states and 209 transitions. [2022-11-19 08:05:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:05:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:28,795 INFO L225 Difference]: With dead ends: 115 [2022-11-19 08:05:28,795 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 08:05:28,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:05:28,796 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:28,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 08:05:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2022-11-19 08:05:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 76 states have internal predecessors, (150), 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) [2022-11-19 08:05:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 150 transitions. [2022-11-19 08:05:28,800 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 150 transitions. Word has length 22 [2022-11-19 08:05:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:28,800 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 150 transitions. [2022-11-19 08:05:28,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 150 transitions. [2022-11-19 08:05:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:28,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:28,801 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] [2022-11-19 08:05:28,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:05:28,801 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1087353047, now seen corresponding path program 9 times [2022-11-19 08:05:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985832412] [2022-11-19 08:05:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:28,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:29,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985832412] [2022-11-19 08:05:29,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985832412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:29,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:29,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:05:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252402946] [2022-11-19 08:05:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:29,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:05:29,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:05:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:05:29,863 INFO L87 Difference]: Start difference. First operand 77 states and 150 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:30,358 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2022-11-19 08:05:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:30,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:30,360 INFO L225 Difference]: With dead ends: 98 [2022-11-19 08:05:30,360 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 08:05:30,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:05:30,360 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:30,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 08:05:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-11-19 08:05:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.8805970149253732) internal successors, (126), 67 states have internal predecessors, (126), 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) [2022-11-19 08:05:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 126 transitions. [2022-11-19 08:05:30,364 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 126 transitions. Word has length 22 [2022-11-19 08:05:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:30,364 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 126 transitions. [2022-11-19 08:05:30,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-19 08:05:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 126 transitions. [2022-11-19 08:05:30,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:30,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:30,365 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] [2022-11-19 08:05:30,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:05:30,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1690713165, now seen corresponding path program 10 times [2022-11-19 08:05:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:30,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28897574] [2022-11-19 08:05:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:30,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:31,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:31,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28897574] [2022-11-19 08:05:31,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28897574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:31,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:31,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:05:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477205590] [2022-11-19 08:05:31,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:31,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:05:31,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:05:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:05:31,589 INFO L87 Difference]: Start difference. First operand 68 states and 126 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:32,059 INFO L93 Difference]: Finished difference Result 86 states and 154 transitions. [2022-11-19 08:05:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:05:32,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:32,060 INFO L225 Difference]: With dead ends: 86 [2022-11-19 08:05:32,060 INFO L226 Difference]: Without dead ends: 81 [2022-11-19 08:05:32,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:05:32,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:32,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:32,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-19 08:05:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2022-11-19 08:05:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 65 states have internal predecessors, (123), 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) [2022-11-19 08:05:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 123 transitions. [2022-11-19 08:05:32,064 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 123 transitions. Word has length 22 [2022-11-19 08:05:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:32,064 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 123 transitions. [2022-11-19 08:05:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 123 transitions. [2022-11-19 08:05:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:32,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:32,065 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] [2022-11-19 08:05:32,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:05:32,066 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash 680592845, now seen corresponding path program 11 times [2022-11-19 08:05:32,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:32,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647337967] [2022-11-19 08:05:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:33,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:33,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647337967] [2022-11-19 08:05:33,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647337967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:33,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:33,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:05:33,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794445162] [2022-11-19 08:05:33,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:05:33,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:05:33,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:05:33,111 INFO L87 Difference]: Start difference. First operand 66 states and 123 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:33,668 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2022-11-19 08:05:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:33,669 INFO L225 Difference]: With dead ends: 107 [2022-11-19 08:05:33,669 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 08:05:33,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:05:33,670 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:33,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 08:05:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 69. [2022-11-19 08:05:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 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) [2022-11-19 08:05:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 133 transitions. [2022-11-19 08:05:33,673 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 133 transitions. Word has length 22 [2022-11-19 08:05:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:33,674 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 133 transitions. [2022-11-19 08:05:33,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 133 transitions. [2022-11-19 08:05:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:33,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:33,675 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] [2022-11-19 08:05:33,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:05:33,676 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 684160721, now seen corresponding path program 12 times [2022-11-19 08:05:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:33,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676208387] [2022-11-19 08:05:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:34,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676208387] [2022-11-19 08:05:34,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676208387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:34,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:34,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:05:34,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564429189] [2022-11-19 08:05:34,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:34,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:05:34,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:34,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:05:34,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:05:34,814 INFO L87 Difference]: Start difference. First operand 69 states and 133 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:35,399 INFO L93 Difference]: Finished difference Result 90 states and 166 transitions. [2022-11-19 08:05:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:05:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:35,401 INFO L225 Difference]: With dead ends: 90 [2022-11-19 08:05:35,401 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 08:05:35,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:05:35,402 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:35,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:35,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 08:05:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2022-11-19 08:05:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 states have internal predecessors, (116), 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) [2022-11-19 08:05:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 116 transitions. [2022-11-19 08:05:35,404 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 116 transitions. Word has length 22 [2022-11-19 08:05:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:35,405 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 116 transitions. [2022-11-19 08:05:35,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 116 transitions. [2022-11-19 08:05:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:35,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:35,405 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] [2022-11-19 08:05:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:05:35,406 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1766271245, now seen corresponding path program 13 times [2022-11-19 08:05:35,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:35,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847900558] [2022-11-19 08:05:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:36,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847900558] [2022-11-19 08:05:36,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847900558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:36,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:36,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:05:36,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062854460] [2022-11-19 08:05:36,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:36,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:05:36,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:05:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:05:36,528 INFO L87 Difference]: Start difference. First operand 63 states and 116 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:36,891 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2022-11-19 08:05:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:05:36,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:36,892 INFO L225 Difference]: With dead ends: 80 [2022-11-19 08:05:36,892 INFO L226 Difference]: Without dead ends: 75 [2022-11-19 08:05:36,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:05:36,893 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:36,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-19 08:05:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2022-11-19 08:05:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.85) internal successors, (111), 60 states have internal predecessors, (111), 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) [2022-11-19 08:05:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 111 transitions. [2022-11-19 08:05:36,896 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 111 transitions. Word has length 22 [2022-11-19 08:05:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:36,896 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 111 transitions. [2022-11-19 08:05:36,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 111 transitions. [2022-11-19 08:05:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:36,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:36,897 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] [2022-11-19 08:05:36,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 08:05:36,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1769839121, now seen corresponding path program 14 times [2022-11-19 08:05:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:36,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850723543] [2022-11-19 08:05:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:38,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:38,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850723543] [2022-11-19 08:05:38,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850723543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:38,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:38,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 08:05:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451785285] [2022-11-19 08:05:38,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:38,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:05:38,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:05:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:05:38,119 INFO L87 Difference]: Start difference. First operand 61 states and 111 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-19 08:05:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:38,823 INFO L93 Difference]: Finished difference Result 83 states and 137 transitions. [2022-11-19 08:05:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:38,824 INFO L225 Difference]: With dead ends: 83 [2022-11-19 08:05:38,824 INFO L226 Difference]: Without dead ends: 73 [2022-11-19 08:05:38,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:05:38,825 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:38,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-19 08:05:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-11-19 08:05:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 57 states have internal predecessors, (101), 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) [2022-11-19 08:05:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2022-11-19 08:05:38,828 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 22 [2022-11-19 08:05:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:38,828 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2022-11-19 08:05:38,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-19 08:05:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2022-11-19 08:05:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:05:38,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:38,829 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] [2022-11-19 08:05:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:05:38,830 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash -848114095, now seen corresponding path program 15 times [2022-11-19 08:05:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229482964] [2022-11-19 08:05:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:38,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:40,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:40,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229482964] [2022-11-19 08:05:40,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229482964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:40,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:40,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:05:40,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576599428] [2022-11-19 08:05:40,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:40,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:05:40,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:40,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:05:40,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:05:40,026 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:40,452 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2022-11-19 08:05:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:05:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 22 [2022-11-19 08:05:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:40,453 INFO L225 Difference]: With dead ends: 69 [2022-11-19 08:05:40,453 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 08:05:40,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:05:40,454 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:40,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 08:05:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-19 08:05:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 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) [2022-11-19 08:05:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2022-11-19 08:05:40,456 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 22 [2022-11-19 08:05:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:40,457 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2022-11-19 08:05:40,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-11-19 08:05:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2022-11-19 08:05:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:05:40,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:40,457 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] [2022-11-19 08:05:40,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 08:05:40,458 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1444278548, now seen corresponding path program 1 times [2022-11-19 08:05:40,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:40,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473513877] [2022-11-19 08:05:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:40,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:41,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473513877] [2022-11-19 08:05:41,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473513877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:41,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:41,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:41,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290527215] [2022-11-19 08:05:41,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:41,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:41,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:41,792 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-11-19 08:05:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:42,331 INFO L93 Difference]: Finished difference Result 71 states and 112 transitions. [2022-11-19 08:05:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:05:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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 24 [2022-11-19 08:05:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:42,334 INFO L225 Difference]: With dead ends: 71 [2022-11-19 08:05:42,334 INFO L226 Difference]: Without dead ends: 54 [2022-11-19 08:05:42,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:05:42,335 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:42,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-19 08:05:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-11-19 08:05:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 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) [2022-11-19 08:05:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 75 transitions. [2022-11-19 08:05:42,337 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 75 transitions. Word has length 24 [2022-11-19 08:05:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:42,338 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 75 transitions. [2022-11-19 08:05:42,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-11-19 08:05:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 75 transitions. [2022-11-19 08:05:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:05:42,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:42,338 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] [2022-11-19 08:05:42,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 08:05:42,339 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1297203136, now seen corresponding path program 2 times [2022-11-19 08:05:42,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:42,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769460559] [2022-11-19 08:05:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:42,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:43,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:43,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769460559] [2022-11-19 08:05:43,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769460559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:43,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:43,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:05:43,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065353779] [2022-11-19 08:05:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:43,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:05:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:05:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:05:43,127 INFO L87 Difference]: Start difference. First operand 48 states and 75 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-11-19 08:05:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:43,301 INFO L93 Difference]: Finished difference Result 58 states and 89 transitions. [2022-11-19 08:05:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:05:43,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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 24 [2022-11-19 08:05:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:43,303 INFO L225 Difference]: With dead ends: 58 [2022-11-19 08:05:43,303 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 08:05:43,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:05:43,304 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:43,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 08:05:43,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-19 08:05:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.6) internal successors, (80), 50 states have internal predecessors, (80), 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) [2022-11-19 08:05:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 80 transitions. [2022-11-19 08:05:43,307 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 80 transitions. Word has length 24 [2022-11-19 08:05:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:43,307 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 80 transitions. [2022-11-19 08:05:43,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-11-19 08:05:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 80 transitions. [2022-11-19 08:05:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:05:43,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:43,308 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] [2022-11-19 08:05:43,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 08:05:43,308 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1821822646, now seen corresponding path program 3 times [2022-11-19 08:05:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303533217] [2022-11-19 08:05:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:43,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:44,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:44,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303533217] [2022-11-19 08:05:44,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303533217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:44,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:44,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:05:44,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434180724] [2022-11-19 08:05:44,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:44,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:05:44,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:05:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:05:44,049 INFO L87 Difference]: Start difference. First operand 51 states and 80 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-11-19 08:05:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:44,204 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2022-11-19 08:05:44,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:05:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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 24 [2022-11-19 08:05:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:44,205 INFO L225 Difference]: With dead ends: 61 [2022-11-19 08:05:44,205 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 08:05:44,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:05:44,206 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:44,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 08:05:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-19 08:05:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 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) [2022-11-19 08:05:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2022-11-19 08:05:44,208 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 24 [2022-11-19 08:05:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:44,208 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2022-11-19 08:05:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-11-19 08:05:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2022-11-19 08:05:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:05:44,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:44,209 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] [2022-11-19 08:05:44,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 08:05:44,209 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:44,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1644656520, now seen corresponding path program 4 times [2022-11-19 08:05:44,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:44,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601598642] [2022-11-19 08:05:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:44,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:45,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:45,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601598642] [2022-11-19 08:05:45,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601598642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:45,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:45,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:45,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100419329] [2022-11-19 08:05:45,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:45,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:05:45,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:05:45,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:05:45,040 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-11-19 08:05:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:45,250 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-11-19 08:05:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 24 [2022-11-19 08:05:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:45,251 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:05:45,251 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 08:05:45,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:05:45,252 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:45,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 08:05:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 08:05:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 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) [2022-11-19 08:05:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-11-19 08:05:45,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 24 [2022-11-19 08:05:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:45,254 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-11-19 08:05:45,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-11-19 08:05:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-11-19 08:05:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:05:45,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:45,255 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] [2022-11-19 08:05:45,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 08:05:45,255 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 285542966, now seen corresponding path program 5 times [2022-11-19 08:05:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:45,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914261313] [2022-11-19 08:05:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:45,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:05:46,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914261313] [2022-11-19 08:05:46,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914261313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969248556] [2022-11-19 08:05:46,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:05:46,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:46,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:46,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:46,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:05:46,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:05:46,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:05:46,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:05:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:47,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:47,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 08:05:47,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:47,380 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 263 treesize of output 273 [2022-11-19 08:05:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:47,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:05:47,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969248556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:47,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:05:47,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 18 [2022-11-19 08:05:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989257042] [2022-11-19 08:05:47,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:47,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:05:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:05:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:05:47,942 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-11-19 08:05:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:48,235 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-19 08:05:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 24 [2022-11-19 08:05:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:48,236 INFO L225 Difference]: With dead ends: 41 [2022-11-19 08:05:48,236 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 08:05:48,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:05:48,237 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:48,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 08:05:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 08:05:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2022-11-19 08:05:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-19 08:05:48,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2022-11-19 08:05:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:48,240 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-19 08:05:48,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-11-19 08:05:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-19 08:05:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:05:48,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:48,240 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] [2022-11-19 08:05:48,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:05:48,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:05:48,447 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-19 08:05:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:48,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1646685420, now seen corresponding path program 6 times [2022-11-19 08:05:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:48,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127522163] [2022-11-19 08:05:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:48,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:49,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:49,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127522163] [2022-11-19 08:05:49,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127522163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:49,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:49,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:05:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126797503] [2022-11-19 08:05:49,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:49,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:05:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:05:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:05:49,438 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-11-19 08:05:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:49,632 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-11-19 08:05:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:05:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2022-11-19 08:05:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:49,633 INFO L225 Difference]: With dead ends: 27 [2022-11-19 08:05:49,633 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:05:49,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:05:49,634 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:49,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:05:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:05:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-19 08:05:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:05:49,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-11-19 08:05:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:49,635 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:05:49,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-11-19 08:05:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:05:49,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:05:49,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-11-19 08:05:49,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-11-19 08:05:49,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-11-19 08:05:49,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 08:05:49,641 INFO L444 BasicCegarLoop]: Path program histogram: [15, 6, 1, 1, 1, 1] [2022-11-19 08:05:49,643 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-19 08:05:49,644 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:05:49,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:05:49 BasicIcfg [2022-11-19 08:05:49,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:05:49,647 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:05:49,647 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:05:49,647 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:05:49,648 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:54" (3/4) ... [2022-11-19 08:05:49,651 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 08:05:49,657 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-11-19 08:05:49,657 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-11-19 08:05:49,669 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 35 nodes and edges [2022-11-19 08:05:49,669 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-19 08:05:49,670 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-19 08:05:49,670 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 08:05:49,731 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:05:49,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:05:49,732 INFO L158 Benchmark]: Toolchain (without parser) took 56320.74ms. Allocated memory was 113.2MB in the beginning and 648.0MB in the end (delta: 534.8MB). Free memory was 77.5MB in the beginning and 509.3MB in the end (delta: -431.9MB). Peak memory consumption was 101.4MB. Max. memory is 16.1GB. [2022-11-19 08:05:49,732 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 113.2MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:05:49,732 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.37ms. Allocated memory is still 113.2MB. Free memory was 77.3MB in the beginning and 87.2MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:05:49,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.60ms. Allocated memory is still 113.2MB. Free memory was 87.2MB in the beginning and 84.6MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 08:05:49,734 INFO L158 Benchmark]: Boogie Preprocessor took 39.78ms. Allocated memory is still 113.2MB. Free memory was 84.6MB in the beginning and 82.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:05:49,734 INFO L158 Benchmark]: RCFGBuilder took 897.34ms. Allocated memory is still 113.2MB. Free memory was 82.5MB in the beginning and 56.6MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-19 08:05:49,737 INFO L158 Benchmark]: TraceAbstraction took 54907.53ms. Allocated memory was 113.2MB in the beginning and 648.0MB in the end (delta: 534.8MB). Free memory was 56.0MB in the beginning and 514.6MB in the end (delta: -458.6MB). Peak memory consumption was 78.9MB. Max. memory is 16.1GB. [2022-11-19 08:05:49,737 INFO L158 Benchmark]: Witness Printer took 84.63ms. Allocated memory is still 648.0MB. Free memory was 514.6MB in the beginning and 509.3MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 08:05:49,747 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 113.2MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.37ms. Allocated memory is still 113.2MB. Free memory was 77.3MB in the beginning and 87.2MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.60ms. Allocated memory is still 113.2MB. Free memory was 87.2MB in the beginning and 84.6MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.78ms. Allocated memory is still 113.2MB. Free memory was 84.6MB in the beginning and 82.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 897.34ms. Allocated memory is still 113.2MB. Free memory was 82.5MB in the beginning and 56.6MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 54907.53ms. Allocated memory was 113.2MB in the beginning and 648.0MB in the end (delta: 534.8MB). Free memory was 56.0MB in the beginning and 514.6MB in the end (delta: -458.6MB). Peak memory consumption was 78.9MB. Max. memory is 16.1GB. * Witness Printer took 84.63ms. Allocated memory is still 648.0MB. Free memory was 514.6MB in the beginning and 509.3MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 17.4s, 353 PlacesBefore, 30 PlacesAfterwards, 374 TransitionsBefore, 28 TransitionsAfterwards, 7452 CoEnabledTransitionPairs, 9 FixpointIterations, 230 TrivialSequentialCompositions, 102 ConcurrentSequentialCompositions, 53 TrivialYvCompositions, 24 ConcurrentYvCompositions, 23 ChoiceCompositions, 432 TotalNumberOfCompositions, 7887 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6407, independent: 6281, independent conditional: 0, independent unconditional: 6281, dependent: 126, dependent conditional: 0, dependent unconditional: 126, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5220, independent: 5183, independent conditional: 0, independent unconditional: 5183, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5220, independent: 5183, independent conditional: 0, independent unconditional: 5183, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 37, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 125, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 125, dependent conditional: 0, dependent unconditional: 125, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6407, independent: 1098, independent conditional: 0, independent unconditional: 1098, dependent: 89, dependent conditional: 0, dependent unconditional: 89, unknown: 5220, unknown conditional: 0, unknown unconditional: 5220] , Statistics on independence cache: Total cache size (in pairs): 44, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 93]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 451 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 54.6s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 17.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1246 SdHoareTripleChecker+Valid, 5.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1246 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 121 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4505 IncrementalHoareTripleChecker+Invalid, 4626 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 121 mSolverCounterUnsat, 0 mSDtfsCounter, 4505 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 297 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=12, InterpolantAutomatonStates: 179, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 366 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 24.1s InterpolantComputationTime, 576 NumberOfCodeBlocks, 572 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 10487 SizeOfPredicates, 29 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 26 InterpolantComputations, 25 PerfectInterpolantSequences, 93/94 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-19 08:05:49,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c450637-3557-4bd0-94cb-8d3604c2a8e5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE