./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:16:03,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:16:03,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:16:03,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:16:03,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:16:03,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:16:03,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:16:03,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:16:03,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:16:03,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:16:03,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:16:03,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:16:03,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:16:03,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:16:03,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:16:03,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:16:03,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:16:03,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:16:03,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:16:03,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:16:03,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:16:03,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:16:03,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:16:03,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:16:03,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:16:03,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:16:03,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:16:03,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:16:03,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:16:03,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:16:03,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:16:03,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:16:03,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:16:03,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:16:03,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:16:03,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:16:03,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:16:03,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:16:03,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:16:03,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:16:03,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:16:03,887 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:16:03,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:16:03,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:16:03,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:16:03,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:16:03,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:16:03,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:16:03,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:16:03,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:16:03,956 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:16:03,957 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:16:03,958 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:16:03,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:16:03,959 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:16:03,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:16:03,960 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:16:03,960 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:16:03,960 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:16:03,960 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:16:03,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:16:03,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:16:03,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:16:03,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:16:03,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:16:03,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:16:03,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:16:03,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:16:03,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:16:03,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:16:03,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:16:03,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:16:03,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:16:03,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:16:03,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:03,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:16:03,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:16:03,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:16:03,970 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:16:03,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:16:03,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:16:03,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:16:03,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:16:03,972 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2021-11-20 23:16:04,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:16:04,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:16:04,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:16:04,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:16:04,324 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:16:04,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-11-20 23:16:04,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/data/9adb49578/1124ebd557b947619612ef9b4b83b72a/FLAG54c7d7980 [2021-11-20 23:16:04,905 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:16:04,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-11-20 23:16:04,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/data/9adb49578/1124ebd557b947619612ef9b4b83b72a/FLAG54c7d7980 [2021-11-20 23:16:05,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/data/9adb49578/1124ebd557b947619612ef9b4b83b72a [2021-11-20 23:16:05,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:16:05,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:16:05,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:05,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:16:05,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:16:05,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631cc4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05, skipping insertion in model container [2021-11-20 23:16:05,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:16:05,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:16:05,563 WARN L230 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_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2021-11-20 23:16:05,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:05,594 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:16:05,615 WARN L230 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_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2021-11-20 23:16:05,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:05,640 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:16:05,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05 WrapperNode [2021-11-20 23:16:05,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:05,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:05,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:16:05,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:16:05,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,725 INFO L137 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2021-11-20 23:16:05,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:05,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:16:05,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:16:05,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:16:05,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:16:05,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:16:05,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:16:05,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:16:05,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (1/1) ... [2021-11-20 23:16:05,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:05,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:05,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:16:05,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:16:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:16:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:16:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:16:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:16:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 23:16:05,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 23:16:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 23:16:05,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 23:16:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:16:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 23:16:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 23:16:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:16:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:16:05,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:16:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:16:05,894 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 23:16:06,025 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:16:06,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:16:06,343 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:16:06,462 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:16:06,463 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:16:06,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:06 BoogieIcfgContainer [2021-11-20 23:16:06,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:16:06,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:16:06,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:16:06,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:16:06,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:16:05" (1/3) ... [2021-11-20 23:16:06,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5733186b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:06, skipping insertion in model container [2021-11-20 23:16:06,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:05" (2/3) ... [2021-11-20 23:16:06,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5733186b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:06, skipping insertion in model container [2021-11-20 23:16:06,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:06" (3/3) ... [2021-11-20 23:16:06,477 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2021-11-20 23:16:06,483 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 23:16:06,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:16:06,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:16:06,484 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 23:16:06,521 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,522 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,522 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,522 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,523 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,523 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,523 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,524 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,524 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,524 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,530 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,530 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,530 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,531 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,531 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,531 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,533 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,533 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,533 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,536 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,536 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,536 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,542 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,545 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,545 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,545 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,546 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,546 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,547 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,547 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,547 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,547 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,548 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,548 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,548 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,549 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,549 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,550 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,550 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,550 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,551 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,554 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,566 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,567 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,567 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,567 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,568 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,568 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,568 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,573 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,573 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,576 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,577 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,578 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:16:06,586 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 23:16:06,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:16:06,686 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:16:06,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 23:16:06,714 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-20 23:16:06,734 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 117 transitions, 250 flow [2021-11-20 23:16:06,737 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 117 transitions, 250 flow [2021-11-20 23:16:06,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2021-11-20 23:16:06,840 INFO L129 PetriNetUnfolder]: 9/115 cut-off events. [2021-11-20 23:16:06,841 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 23:16:06,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2021-11-20 23:16:06,849 INFO L116 LiptonReduction]: Number of co-enabled transitions 500 [2021-11-20 23:16:12,791 INFO L131 LiptonReduction]: Checked pairs total: 596 [2021-11-20 23:16:12,793 INFO L133 LiptonReduction]: Total number of compositions: 114 [2021-11-20 23:16:12,803 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 20 transitions, 56 flow [2021-11-20 23:16:12,820 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2021-11-20 23:16:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2021-11-20 23:16:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:16:12,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:12,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:12,832 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 23:16:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1628212080, now seen corresponding path program 1 times [2021-11-20 23:16:12,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:12,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280724443] [2021-11-20 23:16:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:12,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:13,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:13,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280724443] [2021-11-20 23:16:13,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280724443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:13,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:13,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 23:16:13,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898328934] [2021-11-20 23:16:13,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:13,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:13,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:13,265 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-11-20 23:16:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:13,340 INFO L93 Difference]: Finished difference Result 62 states and 136 transitions. [2021-11-20 23:16:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-11-20 23:16:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:13,356 INFO L225 Difference]: With dead ends: 62 [2021-11-20 23:16:13,357 INFO L226 Difference]: Without dead ends: 57 [2021-11-20 23:16:13,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:13,364 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:13,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-20 23:16:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-20 23:16:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.25) internal successors, (126), 56 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) [2021-11-20 23:16:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 126 transitions. [2021-11-20 23:16:13,425 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 126 transitions. Word has length 14 [2021-11-20 23:16:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:13,426 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 126 transitions. [2021-11-20 23:16:13,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-11-20 23:16:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 126 transitions. [2021-11-20 23:16:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:16:13,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:13,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:13,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:16:13,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 23:16:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1985475477, now seen corresponding path program 1 times [2021-11-20 23:16:13,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:13,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382477024] [2021-11-20 23:16:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:13,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:13,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:13,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382477024] [2021-11-20 23:16:13,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382477024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:13,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:13,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:13,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553079908] [2021-11-20 23:16:13,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:13,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:13,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:13,630 INFO L87 Difference]: Start difference. First operand 57 states and 126 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-20 23:16:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:13,738 INFO L93 Difference]: Finished difference Result 109 states and 227 transitions. [2021-11-20 23:16:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-11-20 23:16:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:13,746 INFO L225 Difference]: With dead ends: 109 [2021-11-20 23:16:13,746 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 23:16:13,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:16:13,751 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:13,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 23:16:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-11-20 23:16:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.244186046511628) internal successors, (193), 86 states have internal predecessors, (193), 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) [2021-11-20 23:16:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 193 transitions. [2021-11-20 23:16:13,786 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 193 transitions. Word has length 15 [2021-11-20 23:16:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:13,787 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 193 transitions. [2021-11-20 23:16:13,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-20 23:16:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 193 transitions. [2021-11-20 23:16:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:16:13,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:13,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:13,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:16:13,797 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 23:16:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1573371461, now seen corresponding path program 1 times [2021-11-20 23:16:13,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:13,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847460173] [2021-11-20 23:16:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:13,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:13,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847460173] [2021-11-20 23:16:13,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847460173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:13,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:13,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:13,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323934418] [2021-11-20 23:16:13,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:13,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:13,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:13,941 INFO L87 Difference]: Start difference. First operand 87 states and 193 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-20 23:16:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:14,012 INFO L93 Difference]: Finished difference Result 75 states and 155 transitions. [2021-11-20 23:16:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:14,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-11-20 23:16:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:14,016 INFO L225 Difference]: With dead ends: 75 [2021-11-20 23:16:14,016 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 23:16:14,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:16:14,021 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:14,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 23:16:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-20 23:16:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 57 states have internal predecessors, (127), 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) [2021-11-20 23:16:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 127 transitions. [2021-11-20 23:16:14,046 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 127 transitions. Word has length 15 [2021-11-20 23:16:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:14,047 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 127 transitions. [2021-11-20 23:16:14,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-20 23:16:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 127 transitions. [2021-11-20 23:16:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:16:14,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:14,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:14,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:16:14,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 23:16:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:14,051 INFO L85 PathProgramCache]: Analyzing trace with hash 268474802, now seen corresponding path program 1 times [2021-11-20 23:16:14,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:14,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560079742] [2021-11-20 23:16:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:14,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:14,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560079742] [2021-11-20 23:16:14,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560079742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157726280] [2021-11-20 23:16:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:14,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:14,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:14,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:14,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:16:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:16:14,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:14,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:14,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157726280] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:14,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:14,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2021-11-20 23:16:14,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860140687] [2021-11-20 23:16:14,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:14,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:14,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:16:14,518 INFO L87 Difference]: Start difference. First operand 58 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-20 23:16:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:14,585 INFO L93 Difference]: Finished difference Result 52 states and 115 transitions. [2021-11-20 23:16:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-11-20 23:16:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:14,586 INFO L225 Difference]: With dead ends: 52 [2021-11-20 23:16:14,586 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 23:16:14,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:16:14,588 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:14,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 4 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 23:16:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2021-11-20 23:16:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 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) [2021-11-20 23:16:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 95 transitions. [2021-11-20 23:16:14,593 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 95 transitions. Word has length 16 [2021-11-20 23:16:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:14,593 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 95 transitions. [2021-11-20 23:16:14,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-20 23:16:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 95 transitions. [2021-11-20 23:16:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:16:14,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:14,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:14,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:14,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 23:16:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash 680578818, now seen corresponding path program 1 times [2021-11-20 23:16:14,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:14,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552217741] [2021-11-20 23:16:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:14,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:14,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:14,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552217741] [2021-11-20 23:16:14,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552217741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:14,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703368711] [2021-11-20 23:16:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:14,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:14,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:14,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:16:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:15,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:16:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:15,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:15,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703368711] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:15,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:15,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2021-11-20 23:16:15,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037869082] [2021-11-20 23:16:15,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:15,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:15,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:16:15,202 INFO L87 Difference]: Start difference. First operand 44 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-20 23:16:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:15,262 INFO L93 Difference]: Finished difference Result 54 states and 119 transitions. [2021-11-20 23:16:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-11-20 23:16:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:15,263 INFO L225 Difference]: With dead ends: 54 [2021-11-20 23:16:15,264 INFO L226 Difference]: Without dead ends: 54 [2021-11-20 23:16:15,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:16:15,265 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:15,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 4 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-20 23:16:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-20 23:16:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 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) [2021-11-20 23:16:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 119 transitions. [2021-11-20 23:16:15,271 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 119 transitions. Word has length 16 [2021-11-20 23:16:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:15,272 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 119 transitions. [2021-11-20 23:16:15,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-20 23:16:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 119 transitions. [2021-11-20 23:16:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:16:15,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:15,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:15,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:15,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:15,492 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 23:16:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 867565625, now seen corresponding path program 1 times [2021-11-20 23:16:15,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:15,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372368502] [2021-11-20 23:16:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:15,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:15,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372368502] [2021-11-20 23:16:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372368502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883045612] [2021-11-20 23:16:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:15,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:15,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:15,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:15,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d49beb6-bbaa-42bb-a0b3-a24937ddaefc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:16:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:15,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 23:16:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-20 23:16:16,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:16:16,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:16:16,239 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:16:16,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-11-20 23:16:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:16,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:17,568 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~#t2~0#1.offset| Int) (|v_ULTIMATE.start_main_#t~pre11#1_42| Int)) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |v_ULTIMATE.start_main_#t~pre11#1_42|)) c_~A~0.base) c_~A~0.offset))) (forall ((|ULTIMATE.start_main_~#t2~0#1.offset| Int) (|v_ULTIMATE.start_main_#t~pre11#1_42| Int)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |v_ULTIMATE.start_main_#t~pre11#1_42|)) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 1)))) is different from false [2021-11-20 23:16:46,859 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:16:46,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3190 treesize of output 3030