./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8 --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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:19,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:19,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:19,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:19,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:19,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:19,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:19,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:19,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:19,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:19,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:19,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:19,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:19,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:19,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:19,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:19,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:19,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:19,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:19,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:19,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:19,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:19,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:19,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:19,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:19,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:19,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:19,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:19,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:19,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:19,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:19,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:19,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:19,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:19,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:19,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:19,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:19,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:19,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:19,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:19,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:20,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:11:20,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:20,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:20,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:20,043 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:20,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:20,043 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:20,043 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:11:20,044 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:20,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:20,044 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:11:20,045 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:11:20,045 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:20,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:11:20,046 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:11:20,046 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:11:20,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:20,047 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:20,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:11:20,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:20,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:20,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:20,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:20,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:20,048 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:20,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:20,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:20,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:20,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:20,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:20,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:20,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:20,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:20,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:20,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:20,052 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:11:20,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:11:20,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:20,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:20,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:20,053 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_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2021-11-07 01:11:20,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:20,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:20,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:20,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:20,361 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:20,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2021-11-07 01:11:20,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/395aad8e3/77adc0f963d04c8ab07d12070cb07427/FLAG641c100e5 [2021-11-07 01:11:20,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:20,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2021-11-07 01:11:20,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/395aad8e3/77adc0f963d04c8ab07d12070cb07427/FLAG641c100e5 [2021-11-07 01:11:21,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/395aad8e3/77adc0f963d04c8ab07d12070cb07427 [2021-11-07 01:11:21,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:21,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:21,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:21,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:21,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:21,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:21" (1/1) ... [2021-11-07 01:11:21,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645dbfff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:21, skipping insertion in model container [2021-11-07 01:11:21,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:21" (1/1) ... [2021-11-07 01:11:21,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:21,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:21,565 WARN L228 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_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2021-11-07 01:11:21,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:21,583 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:11:21,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f45925a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:21, skipping insertion in model container [2021-11-07 01:11:21,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:21,585 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:11:21,587 INFO L168 Benchmark]: Toolchain (without parser) took 306.80 ms. Allocated memory is still 104.9 MB. Free memory was 62.9 MB in the beginning and 78.9 MB in the end (delta: -15.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:21,587 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 104.9 MB. Free memory is still 79.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:21,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.12 ms. Allocated memory is still 104.9 MB. Free memory was 62.7 MB in the beginning and 78.9 MB in the end (delta: -16.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:21,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 104.9 MB. Free memory is still 79.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.12 ms. Allocated memory is still 104.9 MB. Free memory was 62.7 MB in the beginning and 78.9 MB in the end (delta: -16.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8 --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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:23,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:23,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:24,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:24,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:24,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:24,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:24,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:24,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:24,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:24,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:24,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:24,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:24,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:24,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:24,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:24,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:24,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:24,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:24,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:24,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:24,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:24,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:24,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:24,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:24,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:24,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:24,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:24,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:24,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:24,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:24,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:24,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:24,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:24,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:24,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:24,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:24,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:24,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:24,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:24,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:24,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:11:24,170 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:24,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:24,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:24,171 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:24,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:24,172 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:24,172 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:24,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:24,173 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:24,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:24,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:24,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:24,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:24,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:24,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:24,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:24,177 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:24,177 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:11:24,177 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:11:24,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:24,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:24,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:24,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:24,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:24,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:11:24,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:24,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:24,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:24,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:24,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:24,179 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:11:24,180 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:24,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:24,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:24,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:24,181 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2021-11-07 01:11:24,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:24,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:24,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:24,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:24,613 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:24,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2021-11-07 01:11:24,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/2ad9216de/5a50b0f9fe994cc1b946bac5b0ed72ca/FLAG55bb8616a [2021-11-07 01:11:25,289 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:25,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2021-11-07 01:11:25,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/2ad9216de/5a50b0f9fe994cc1b946bac5b0ed72ca/FLAG55bb8616a [2021-11-07 01:11:25,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/data/2ad9216de/5a50b0f9fe994cc1b946bac5b0ed72ca [2021-11-07 01:11:25,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:25,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:25,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:25,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:25,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:25,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:25" (1/1) ... [2021-11-07 01:11:25,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d93fa5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:25, skipping insertion in model container [2021-11-07 01:11:25,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:25" (1/1) ... [2021-11-07 01:11:25,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:25,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:25,840 WARN L228 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_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2021-11-07 01:11:25,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:25,904 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:11:25,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:25,949 WARN L228 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_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2021-11-07 01:11:25,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:25,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:11:25,991 WARN L228 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_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2021-11-07 01:11:25,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:26,013 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:11:26,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26 WrapperNode [2021-11-07 01:11:26,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:26,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:26,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:11:26,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:11:26,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:26,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:11:26,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:11:26,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:11:26,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:11:26,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:11:26,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:11:26,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:11:26,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (1/1) ... [2021-11-07 01:11:26,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:26,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:11:26,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:11:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 01:11:26,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 01:11:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 01:11:26,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 01:11:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-07 01:11:26,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-07 01:11:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-07 01:11:26,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-07 01:11:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 01:11:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 01:11:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:11:26,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:11:26,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:26,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:11:26,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:11:26,235 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 01:11:27,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:27,872 INFO L299 CfgBuilder]: Removed 50 assume(true) statements. [2021-11-07 01:11:27,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:27 BoogieIcfgContainer [2021-11-07 01:11:27,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:27,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:27,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:27,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:27,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:11:25" (1/3) ... [2021-11-07 01:11:27,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1590e820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:27, skipping insertion in model container [2021-11-07 01:11:27,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:26" (2/3) ... [2021-11-07 01:11:27,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1590e820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:27, skipping insertion in model container [2021-11-07 01:11:27,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:27" (3/3) ... [2021-11-07 01:11:27,884 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2021-11-07 01:11:27,889 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 01:11:27,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:27,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:11:27,890 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 01:11:27,928 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,928 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,929 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,929 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,929 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,930 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,931 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,933 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,933 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,933 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,933 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,934 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,934 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,935 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,935 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,935 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,935 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,936 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,936 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,936 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,936 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,937 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,938 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,939 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,939 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,939 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,940 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,940 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,940 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,941 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,941 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,941 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,941 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,942 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,942 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,943 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,944 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,944 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,944 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,944 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,945 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,945 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,945 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,945 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,945 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,946 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,946 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,946 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,946 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,947 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,947 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,947 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,948 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,948 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,948 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,949 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,949 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,949 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,949 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,950 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,950 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,950 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,950 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,951 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,951 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,951 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,951 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,951 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,952 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,952 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,952 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,952 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,953 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,953 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,953 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,953 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,954 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,954 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,954 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,954 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,954 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,955 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,955 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,955 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,960 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,960 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,972 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,972 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,972 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,973 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,976 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,977 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,978 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,979 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,979 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,979 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,979 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,979 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,980 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,980 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,980 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,980 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,980 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,981 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,981 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:11:27,992 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-07 01:11:28,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:28,048 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 [2021-11-07 01:11:28,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:11:28,074 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 01:11:28,085 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 201 transitions, 434 flow [2021-11-07 01:11:28,088 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 201 transitions, 434 flow [2021-11-07 01:11:28,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 196 places, 201 transitions, 434 flow [2021-11-07 01:11:28,166 INFO L129 PetriNetUnfolder]: 18/197 cut-off events. [2021-11-07 01:11:28,167 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-07 01:11:28,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 197 events. 18/197 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2021-11-07 01:11:28,176 INFO L116 LiptonReduction]: Number of co-enabled transitions 1824 [2021-11-07 01:11:54,890 INFO L131 LiptonReduction]: Checked pairs total: 2936 [2021-11-07 01:11:54,890 INFO L133 LiptonReduction]: Total number of compositions: 190 [2021-11-07 01:11:54,904 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 40 transitions, 112 flow [2021-11-07 01:11:54,972 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 526 states, 525 states have (on average 4.102857142857143) internal successors, (2154), 525 states have internal predecessors, (2154), 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) [2021-11-07 01:11:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 526 states, 525 states have (on average 4.102857142857143) internal successors, (2154), 525 states have internal predecessors, (2154), 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) [2021-11-07 01:11:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:11:55,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:55,008 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:55,008 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:11:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:55,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1637141200, now seen corresponding path program 1 times [2021-11-07 01:11:55,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:55,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017611051] [2021-11-07 01:11:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:55,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:55,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:55,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:55,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:55,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:55,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:55,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017611051] [2021-11-07 01:11:55,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017611051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:55,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:55,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-07 01:11:55,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330166163] [2021-11-07 01:11:55,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:55,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:55,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:55,566 INFO L87 Difference]: Start difference. First operand has 526 states, 525 states have (on average 4.102857142857143) internal successors, (2154), 525 states have internal predecessors, (2154), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:55,663 INFO L93 Difference]: Finished difference Result 777 states and 3199 transitions. [2021-11-07 01:11:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:11:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:55,693 INFO L225 Difference]: With dead ends: 777 [2021-11-07 01:11:55,693 INFO L226 Difference]: Without dead ends: 748 [2021-11-07 01:11:55,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-07 01:11:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2021-11-07 01:11:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 4.127175368139223) internal successors, (3083), 747 states have internal predecessors, (3083), 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) [2021-11-07 01:11:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 3083 transitions. [2021-11-07 01:11:55,808 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 3083 transitions. Word has length 27 [2021-11-07 01:11:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:55,809 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 3083 transitions. [2021-11-07 01:11:55,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 3083 transitions. [2021-11-07 01:11:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:11:55,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:55,822 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:55,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:56,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:56,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:11:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1571659656, now seen corresponding path program 1 times [2021-11-07 01:11:56,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:56,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486836257] [2021-11-07 01:11:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:56,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:56,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:56,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:56,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:11:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:56,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:57,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:57,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486836257] [2021-11-07 01:11:57,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486836257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:57,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:57,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:11:57,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228883158] [2021-11-07 01:11:57,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:11:57,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:57,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:11:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:11:57,049 INFO L87 Difference]: Start difference. First operand 748 states and 3083 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 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) [2021-11-07 01:11:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:57,610 INFO L93 Difference]: Finished difference Result 1188 states and 4623 transitions. [2021-11-07 01:11:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:11:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 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 29 [2021-11-07 01:11:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:57,625 INFO L225 Difference]: With dead ends: 1188 [2021-11-07 01:11:57,626 INFO L226 Difference]: Without dead ends: 1146 [2021-11-07 01:11:57,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:11:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-07 01:11:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 946. [2021-11-07 01:11:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 4.058201058201059) internal successors, (3835), 945 states have internal predecessors, (3835), 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) [2021-11-07 01:11:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3835 transitions. [2021-11-07 01:11:57,714 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3835 transitions. Word has length 29 [2021-11-07 01:11:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:57,715 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 3835 transitions. [2021-11-07 01:11:57,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 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) [2021-11-07 01:11:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3835 transitions. [2021-11-07 01:11:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:11:57,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:57,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:57,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:57,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:57,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:11:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1030735046, now seen corresponding path program 1 times [2021-11-07 01:11:57,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:57,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312757504] [2021-11-07 01:11:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:57,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:57,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:57,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:57,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:11:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:58,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:58,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:58,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312757504] [2021-11-07 01:11:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312757504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:58,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:11:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28509023] [2021-11-07 01:11:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:58,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:58,445 INFO L87 Difference]: Start difference. First operand 946 states and 3835 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:58,494 INFO L93 Difference]: Finished difference Result 1298 states and 5030 transitions. [2021-11-07 01:11:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 01:11:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:58,509 INFO L225 Difference]: With dead ends: 1298 [2021-11-07 01:11:58,509 INFO L226 Difference]: Without dead ends: 1238 [2021-11-07 01:11:58,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-11-07 01:11:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1148. [2021-11-07 01:11:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.96512641673932) internal successors, (4548), 1147 states have internal predecessors, (4548), 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) [2021-11-07 01:11:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4548 transitions. [2021-11-07 01:11:58,572 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4548 transitions. Word has length 29 [2021-11-07 01:11:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:58,573 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 4548 transitions. [2021-11-07 01:11:58,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4548 transitions. [2021-11-07 01:11:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:11:58,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:58,579 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:58,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:58,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:58,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:11:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash -83229274, now seen corresponding path program 1 times [2021-11-07 01:11:58,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:58,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225934566] [2021-11-07 01:11:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:58,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:58,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:58,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:11:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:11:59,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:11:59,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:59,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225934566] [2021-11-07 01:11:59,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225934566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:59,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:59,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:59,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806833931] [2021-11-07 01:11:59,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:59,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:59,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:59,390 INFO L87 Difference]: Start difference. First operand 1148 states and 4548 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2021-11-07 01:11:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:59,586 INFO L93 Difference]: Finished difference Result 1736 states and 6557 transitions. [2021-11-07 01:11:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:59,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:11:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:59,608 INFO L225 Difference]: With dead ends: 1736 [2021-11-07 01:11:59,608 INFO L226 Difference]: Without dead ends: 1646 [2021-11-07 01:11:59,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:11:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-11-07 01:11:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1458. [2021-11-07 01:11:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.9306794783802332) internal successors, (5727), 1457 states have internal predecessors, (5727), 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) [2021-11-07 01:11:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5727 transitions. [2021-11-07 01:11:59,677 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5727 transitions. Word has length 30 [2021-11-07 01:11:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:59,678 INFO L470 AbstractCegarLoop]: Abstraction has 1458 states and 5727 transitions. [2021-11-07 01:11:59,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2021-11-07 01:11:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5727 transitions. [2021-11-07 01:11:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:11:59,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:59,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:59,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:59,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:59,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:11:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1073228866, now seen corresponding path program 1 times [2021-11-07 01:11:59,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:59,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964597009] [2021-11-07 01:11:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:59,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:59,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:59,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:59,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:12:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:12:00,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:00,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:00,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:00,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964597009] [2021-11-07 01:12:00,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964597009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:00,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:00,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:12:00,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770988133] [2021-11-07 01:12:00,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:12:00,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:12:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:12:00,417 INFO L87 Difference]: Start difference. First operand 1458 states and 5727 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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) [2021-11-07 01:12:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:00,548 INFO L93 Difference]: Finished difference Result 2071 states and 7785 transitions. [2021-11-07 01:12:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:12:00,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:12:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:00,570 INFO L225 Difference]: With dead ends: 2071 [2021-11-07 01:12:00,571 INFO L226 Difference]: Without dead ends: 1942 [2021-11-07 01:12:00,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:12:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-11-07 01:12:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1698. [2021-11-07 01:12:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.9133765468473776) internal successors, (6641), 1697 states have internal predecessors, (6641), 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) [2021-11-07 01:12:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 6641 transitions. [2021-11-07 01:12:00,668 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 6641 transitions. Word has length 30 [2021-11-07 01:12:00,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:00,669 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 6641 transitions. [2021-11-07 01:12:00,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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) [2021-11-07 01:12:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 6641 transitions. [2021-11-07 01:12:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:00,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:00,677 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:00,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:00,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:00,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1670023142, now seen corresponding path program 1 times [2021-11-07 01:12:00,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:00,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118338072] [2021-11-07 01:12:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:00,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:00,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:00,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:00,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:12:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:01,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:01,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:01,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118338072] [2021-11-07 01:12:01,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118338072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:01,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:01,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:12:01,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124622495] [2021-11-07 01:12:01,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:12:01,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:01,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:12:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:01,703 INFO L87 Difference]: Start difference. First operand 1698 states and 6641 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2021-11-07 01:12:02,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:02,539 INFO L93 Difference]: Finished difference Result 2344 states and 8980 transitions. [2021-11-07 01:12:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:12:02,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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 31 [2021-11-07 01:12:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:02,564 INFO L225 Difference]: With dead ends: 2344 [2021-11-07 01:12:02,565 INFO L226 Difference]: Without dead ends: 2278 [2021-11-07 01:12:02,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:12:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-11-07 01:12:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1760. [2021-11-07 01:12:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.8743604320636726) internal successors, (6815), 1759 states have internal predecessors, (6815), 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) [2021-11-07 01:12:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6815 transitions. [2021-11-07 01:12:02,666 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6815 transitions. Word has length 31 [2021-11-07 01:12:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:02,668 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 6815 transitions. [2021-11-07 01:12:02,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2021-11-07 01:12:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6815 transitions. [2021-11-07 01:12:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:02,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:02,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:02,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:12:02,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:02,891 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:02,891 INFO L85 PathProgramCache]: Analyzing trace with hash -36118614, now seen corresponding path program 2 times [2021-11-07 01:12:02,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:02,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211226576] [2021-11-07 01:12:02,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:12:02,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:02,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:02,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:02,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:12:03,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:03,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:03,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:03,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:03,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:03,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:03,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211226576] [2021-11-07 01:12:03,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211226576] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:03,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:03,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-07 01:12:03,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497674686] [2021-11-07 01:12:03,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:03,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:03,840 INFO L87 Difference]: Start difference. First operand 1760 states and 6815 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:04,323 INFO L93 Difference]: Finished difference Result 2694 states and 9772 transitions. [2021-11-07 01:12:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:12:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2021-11-07 01:12:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:04,406 INFO L225 Difference]: With dead ends: 2694 [2021-11-07 01:12:04,406 INFO L226 Difference]: Without dead ends: 2618 [2021-11-07 01:12:04,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:12:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-11-07 01:12:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1876. [2021-11-07 01:12:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.888533333333333) internal successors, (7291), 1875 states have internal predecessors, (7291), 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) [2021-11-07 01:12:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 7291 transitions. [2021-11-07 01:12:04,615 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 7291 transitions. Word has length 31 [2021-11-07 01:12:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:04,616 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 7291 transitions. [2021-11-07 01:12:04,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 7291 transitions. [2021-11-07 01:12:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:04,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:04,625 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:04,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:04,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:04,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash 402111444, now seen corresponding path program 3 times [2021-11-07 01:12:04,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:04,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201540635] [2021-11-07 01:12:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:12:04,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:04,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:04,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:04,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:12:05,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:12:05,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:05,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:05,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:05,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201540635] [2021-11-07 01:12:05,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201540635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:05,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:05,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:12:05,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519017847] [2021-11-07 01:12:05,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:12:05,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:12:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:05,760 INFO L87 Difference]: Start difference. First operand 1876 states and 7291 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2021-11-07 01:12:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:06,739 INFO L93 Difference]: Finished difference Result 3446 states and 12693 transitions. [2021-11-07 01:12:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:12:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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 31 [2021-11-07 01:12:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:06,776 INFO L225 Difference]: With dead ends: 3446 [2021-11-07 01:12:06,776 INFO L226 Difference]: Without dead ends: 3354 [2021-11-07 01:12:06,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:12:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-11-07 01:12:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 1932. [2021-11-07 01:12:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.9414810978767476) internal successors, (7611), 1931 states have internal predecessors, (7611), 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) [2021-11-07 01:12:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 7611 transitions. [2021-11-07 01:12:06,903 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 7611 transitions. Word has length 31 [2021-11-07 01:12:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:06,904 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 7611 transitions. [2021-11-07 01:12:06,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2021-11-07 01:12:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 7611 transitions. [2021-11-07 01:12:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:06,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:06,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:06,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:07,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:07,130 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash 569124730, now seen corresponding path program 4 times [2021-11-07 01:12:07,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:07,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297772914] [2021-11-07 01:12:07,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:12:07,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:07,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:07,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:12:07,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:12:07,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:12:07,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:07,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:08,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:08,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297772914] [2021-11-07 01:12:08,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297772914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:08,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2058299927] [2021-11-07 01:12:08,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:12:08,273 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:08,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:08,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:12:08,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:12:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:08,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:12:08,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:09,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:09,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2058299927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:09,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271960795] [2021-11-07 01:12:09,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:12:09,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:12:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:12:09,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:12:09,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 01:12:09,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:12:09,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:12:09,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:10,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271960795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:10,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:12:10,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-11-07 01:12:10,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448153376] [2021-11-07 01:12:10,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:12:10,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:12:10,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:12:10,115 INFO L87 Difference]: Start difference. First operand 1932 states and 7611 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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) [2021-11-07 01:12:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:10,818 INFO L93 Difference]: Finished difference Result 3628 states and 13881 transitions. [2021-11-07 01:12:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:12:10,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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 31 [2021-11-07 01:12:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:10,837 INFO L225 Difference]: With dead ends: 3628 [2021-11-07 01:12:10,838 INFO L226 Difference]: Without dead ends: 3324 [2021-11-07 01:12:10,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:12:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-11-07 01:12:10,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 1746. [2021-11-07 01:12:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.8475644699140403) internal successors, (6714), 1745 states have internal predecessors, (6714), 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) [2021-11-07 01:12:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 6714 transitions. [2021-11-07 01:12:10,983 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 6714 transitions. Word has length 31 [2021-11-07 01:12:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:10,983 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 6714 transitions. [2021-11-07 01:12:10,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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) [2021-11-07 01:12:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 6714 transitions. [2021-11-07 01:12:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:10,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:10,991 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:10,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:11,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:11,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:11,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:11,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:11,595 INFO L85 PathProgramCache]: Analyzing trace with hash 862098248, now seen corresponding path program 5 times [2021-11-07 01:12:11,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:11,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221399967] [2021-11-07 01:12:11,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:12:11,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:11,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:11,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:11,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:12:11,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:11,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:12:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:12,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:12,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:12,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221399967] [2021-11-07 01:12:12,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221399967] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:12,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:12,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2021-11-07 01:12:12,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950416423] [2021-11-07 01:12:12,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:12,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:12:12,912 INFO L87 Difference]: Start difference. First operand 1746 states and 6714 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:13,356 INFO L93 Difference]: Finished difference Result 2200 states and 8166 transitions. [2021-11-07 01:12:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:12:13,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2021-11-07 01:12:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:13,363 INFO L225 Difference]: With dead ends: 2200 [2021-11-07 01:12:13,364 INFO L226 Difference]: Without dead ends: 2144 [2021-11-07 01:12:13,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:12:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-11-07 01:12:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1802. [2021-11-07 01:12:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 3.8467518045530262) internal successors, (6928), 1801 states have internal predecessors, (6928), 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) [2021-11-07 01:12:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 6928 transitions. [2021-11-07 01:12:13,436 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 6928 transitions. Word has length 31 [2021-11-07 01:12:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:13,437 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 6928 transitions. [2021-11-07 01:12:13,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 6928 transitions. [2021-11-07 01:12:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:13,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:13,443 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:13,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:13,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:13,665 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash -12784868, now seen corresponding path program 6 times [2021-11-07 01:12:13,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:13,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389583758] [2021-11-07 01:12:13,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:12:13,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:13,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:13,667 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:13,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:12:14,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:12:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:14,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:14,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:14,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:14,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389583758] [2021-11-07 01:12:14,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389583758] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:14,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:14,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-07 01:12:14,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091819818] [2021-11-07 01:12:14,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:14,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:14,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:14,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:14,852 INFO L87 Difference]: Start difference. First operand 1802 states and 6928 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:15,382 INFO L93 Difference]: Finished difference Result 2338 states and 8540 transitions. [2021-11-07 01:12:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:12:15,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2021-11-07 01:12:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:15,394 INFO L225 Difference]: With dead ends: 2338 [2021-11-07 01:12:15,395 INFO L226 Difference]: Without dead ends: 2262 [2021-11-07 01:12:15,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:12:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-11-07 01:12:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1662. [2021-11-07 01:12:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.760987357013847) internal successors, (6247), 1661 states have internal predecessors, (6247), 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) [2021-11-07 01:12:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 6247 transitions. [2021-11-07 01:12:15,480 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 6247 transitions. Word has length 31 [2021-11-07 01:12:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:15,481 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 6247 transitions. [2021-11-07 01:12:15,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 6247 transitions. [2021-11-07 01:12:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:15,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:15,488 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:15,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:15,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:15,707 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash 343492914, now seen corresponding path program 7 times [2021-11-07 01:12:15,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:15,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654759716] [2021-11-07 01:12:15,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:12:15,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:15,709 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:15,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:12:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:16,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:16,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:16,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654759716] [2021-11-07 01:12:16,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654759716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:16,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:16,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:12:16,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741676148] [2021-11-07 01:12:16,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:12:16,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:16,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:12:16,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:16,801 INFO L87 Difference]: Start difference. First operand 1662 states and 6247 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-11-07 01:12:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:17,432 INFO L93 Difference]: Finished difference Result 2042 states and 7578 transitions. [2021-11-07 01:12:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:12:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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 31 [2021-11-07 01:12:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:17,441 INFO L225 Difference]: With dead ends: 2042 [2021-11-07 01:12:17,442 INFO L226 Difference]: Without dead ends: 1887 [2021-11-07 01:12:17,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:12:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-11-07 01:12:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1345. [2021-11-07 01:12:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.900297619047619) internal successors, (5242), 1344 states have internal predecessors, (5242), 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) [2021-11-07 01:12:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 5242 transitions. [2021-11-07 01:12:17,498 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 5242 transitions. Word has length 31 [2021-11-07 01:12:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:17,498 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 5242 transitions. [2021-11-07 01:12:17,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-11-07 01:12:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 5242 transitions. [2021-11-07 01:12:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:17,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:17,504 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:17,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:17,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:17,723 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:17,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1090041541, now seen corresponding path program 1 times [2021-11-07 01:12:17,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:17,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817564011] [2021-11-07 01:12:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:17,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:17,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:17,727 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:17,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:12:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:12:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:18,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:18,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:18,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817564011] [2021-11-07 01:12:18,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817564011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:18,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629861326] [2021-11-07 01:12:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:18,786 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:18,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:18,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:12:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:12:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:19,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:19,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629861326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:19,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803556805] [2021-11-07 01:12:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:19,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:12:19,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:12:19,860 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:12:19,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:12:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:20,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:12:20,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:20,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:20,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803556805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:20,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:12:20,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-11-07 01:12:20,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567266512] [2021-11-07 01:12:20,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:12:20,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:12:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:12:20,762 INFO L87 Difference]: Start difference. First operand 1345 states and 5242 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-11-07 01:12:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:21,466 INFO L93 Difference]: Finished difference Result 3301 states and 12764 transitions. [2021-11-07 01:12:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:12:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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 31 [2021-11-07 01:12:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:21,479 INFO L225 Difference]: With dead ends: 3301 [2021-11-07 01:12:21,479 INFO L226 Difference]: Without dead ends: 2837 [2021-11-07 01:12:21,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:12:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2021-11-07 01:12:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 1341. [2021-11-07 01:12:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.9029850746268657) internal successors, (5230), 1340 states have internal predecessors, (5230), 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) [2021-11-07 01:12:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 5230 transitions. [2021-11-07 01:12:21,553 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 5230 transitions. Word has length 31 [2021-11-07 01:12:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:21,554 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 5230 transitions. [2021-11-07 01:12:21,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-11-07 01:12:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 5230 transitions. [2021-11-07 01:12:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:21,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:21,559 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:21,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:12:21,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-07 01:12:21,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:12:22,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:22,173 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2060837591, now seen corresponding path program 2 times [2021-11-07 01:12:22,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:22,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541880779] [2021-11-07 01:12:22,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:12:22,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:22,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:22,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:22,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:12:22,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:22,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:22,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:22,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:23,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:23,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:23,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541880779] [2021-11-07 01:12:23,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541880779] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:23,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:23,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-07 01:12:23,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556744122] [2021-11-07 01:12:23,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:23,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:23,266 INFO L87 Difference]: Start difference. First operand 1341 states and 5230 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:23,772 INFO L93 Difference]: Finished difference Result 2019 states and 7562 transitions. [2021-11-07 01:12:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:12:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2021-11-07 01:12:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:23,780 INFO L225 Difference]: With dead ends: 2019 [2021-11-07 01:12:23,780 INFO L226 Difference]: Without dead ends: 1827 [2021-11-07 01:12:23,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:12:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-11-07 01:12:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1251. [2021-11-07 01:12:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.872) internal successors, (4840), 1250 states have internal predecessors, (4840), 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) [2021-11-07 01:12:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4840 transitions. [2021-11-07 01:12:23,836 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4840 transitions. Word has length 31 [2021-11-07 01:12:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:23,837 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 4840 transitions. [2021-11-07 01:12:23,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4840 transitions. [2021-11-07 01:12:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:23,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:23,841 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:23,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:24,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:24,055 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1871192077, now seen corresponding path program 3 times [2021-11-07 01:12:24,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:24,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959344071] [2021-11-07 01:12:24,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:12:24,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:24,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:24,057 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:24,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:12:24,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:12:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:24,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:25,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:25,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:25,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959344071] [2021-11-07 01:12:25,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959344071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:25,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:25,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:12:25,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463931847] [2021-11-07 01:12:25,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:12:25,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:25,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:12:25,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:25,303 INFO L87 Difference]: Start difference. First operand 1251 states and 4840 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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) [2021-11-07 01:12:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:26,332 INFO L93 Difference]: Finished difference Result 2985 states and 11209 transitions. [2021-11-07 01:12:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:12:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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 31 [2021-11-07 01:12:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:26,340 INFO L225 Difference]: With dead ends: 2985 [2021-11-07 01:12:26,340 INFO L226 Difference]: Without dead ends: 2953 [2021-11-07 01:12:26,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:12:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-11-07 01:12:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1399. [2021-11-07 01:12:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.9542203147353363) internal successors, (5528), 1398 states have internal predecessors, (5528), 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) [2021-11-07 01:12:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 5528 transitions. [2021-11-07 01:12:26,408 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 5528 transitions. Word has length 31 [2021-11-07 01:12:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:26,409 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 5528 transitions. [2021-11-07 01:12:26,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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) [2021-11-07 01:12:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 5528 transitions. [2021-11-07 01:12:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:26,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:26,414 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:26,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:12:26,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:26,639 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash 73915655, now seen corresponding path program 4 times [2021-11-07 01:12:26,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:26,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985335096] [2021-11-07 01:12:26,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:12:26,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:26,640 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:26,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:12:27,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:12:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:27,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:27,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:27,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985335096] [2021-11-07 01:12:27,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985335096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:27,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:27,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:12:27,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909915079] [2021-11-07 01:12:27,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:12:27,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:27,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:12:27,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:27,789 INFO L87 Difference]: Start difference. First operand 1399 states and 5528 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 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) [2021-11-07 01:12:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:29,151 INFO L93 Difference]: Finished difference Result 3789 states and 13671 transitions. [2021-11-07 01:12:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:12:29,152 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 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 31 [2021-11-07 01:12:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:29,159 INFO L225 Difference]: With dead ends: 3789 [2021-11-07 01:12:29,159 INFO L226 Difference]: Without dead ends: 3615 [2021-11-07 01:12:29,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:12:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-11-07 01:12:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 1247. [2021-11-07 01:12:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.8868378812199036) internal successors, (4843), 1246 states have internal predecessors, (4843), 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) [2021-11-07 01:12:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4843 transitions. [2021-11-07 01:12:29,227 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4843 transitions. Word has length 31 [2021-11-07 01:12:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 4843 transitions. [2021-11-07 01:12:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 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) [2021-11-07 01:12:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4843 transitions. [2021-11-07 01:12:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:29,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:29,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:29,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:29,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:29,447 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:29,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2065807441, now seen corresponding path program 5 times [2021-11-07 01:12:29,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:29,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899680728] [2021-11-07 01:12:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:12:29,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:29,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:29,449 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:29,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:12:30,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:12:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:30,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:30,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:30,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899680728] [2021-11-07 01:12:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899680728] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:30,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:30,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2021-11-07 01:12:30,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341414946] [2021-11-07 01:12:30,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:30,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:30,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:12:30,909 INFO L87 Difference]: Start difference. First operand 1247 states and 4843 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:31,221 INFO L93 Difference]: Finished difference Result 1521 states and 5828 transitions. [2021-11-07 01:12:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:12:31,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2021-11-07 01:12:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:31,225 INFO L225 Difference]: With dead ends: 1521 [2021-11-07 01:12:31,225 INFO L226 Difference]: Without dead ends: 1435 [2021-11-07 01:12:31,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:12:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-11-07 01:12:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1245. [2021-11-07 01:12:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.90032154340836) internal successors, (4852), 1244 states have internal predecessors, (4852), 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) [2021-11-07 01:12:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4852 transitions. [2021-11-07 01:12:31,263 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4852 transitions. Word has length 31 [2021-11-07 01:12:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:31,263 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 4852 transitions. [2021-11-07 01:12:31,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-11-07 01:12:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4852 transitions. [2021-11-07 01:12:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:31,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:31,268 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:31,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:31,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:31,495 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash -251007731, now seen corresponding path program 6 times [2021-11-07 01:12:31,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:31,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824720544] [2021-11-07 01:12:31,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:12:31,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:31,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:31,497 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:12:32,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:12:32,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:32,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:32,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:32,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:32,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824720544] [2021-11-07 01:12:32,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824720544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:32,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:32,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:12:32,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363880891] [2021-11-07 01:12:32,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:12:32,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:12:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:32,788 INFO L87 Difference]: Start difference. First operand 1245 states and 4852 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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) [2021-11-07 01:12:33,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:33,762 INFO L93 Difference]: Finished difference Result 2203 states and 8531 transitions. [2021-11-07 01:12:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:12:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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 31 [2021-11-07 01:12:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:33,774 INFO L225 Difference]: With dead ends: 2203 [2021-11-07 01:12:33,774 INFO L226 Difference]: Without dead ends: 2155 [2021-11-07 01:12:33,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:12:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-11-07 01:12:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1307. [2021-11-07 01:12:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.8935681470137826) internal successors, (5085), 1306 states have internal predecessors, (5085), 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) [2021-11-07 01:12:33,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 5085 transitions. [2021-11-07 01:12:33,816 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 5085 transitions. Word has length 31 [2021-11-07 01:12:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:33,817 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 5085 transitions. [2021-11-07 01:12:33,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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) [2021-11-07 01:12:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 5085 transitions. [2021-11-07 01:12:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:33,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:33,821 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:33,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:34,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:34,036 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1487108181, now seen corresponding path program 7 times [2021-11-07 01:12:34,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:34,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137254931] [2021-11-07 01:12:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:12:34,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:34,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:34,038 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:34,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:12:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:35,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:35,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:35,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137254931] [2021-11-07 01:12:35,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137254931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:35,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:35,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:12:35,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132579618] [2021-11-07 01:12:35,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:12:35,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:12:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:35,227 INFO L87 Difference]: Start difference. First operand 1307 states and 5085 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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) [2021-11-07 01:12:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:36,531 INFO L93 Difference]: Finished difference Result 2557 states and 9621 transitions. [2021-11-07 01:12:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 01:12:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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 31 [2021-11-07 01:12:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:36,537 INFO L225 Difference]: With dead ends: 2557 [2021-11-07 01:12:36,537 INFO L226 Difference]: Without dead ends: 2521 [2021-11-07 01:12:36,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:12:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-11-07 01:12:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1269. [2021-11-07 01:12:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.9242902208201893) internal successors, (4976), 1268 states have internal predecessors, (4976), 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) [2021-11-07 01:12:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4976 transitions. [2021-11-07 01:12:36,579 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4976 transitions. Word has length 31 [2021-11-07 01:12:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:36,579 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 4976 transitions. [2021-11-07 01:12:36,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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) [2021-11-07 01:12:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4976 transitions. [2021-11-07 01:12:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:12:36,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:36,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:36,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-07 01:12:36,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:36,797 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:36,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1695948125, now seen corresponding path program 8 times [2021-11-07 01:12:36,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:36,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982443015] [2021-11-07 01:12:36,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:12:36,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:36,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:36,799 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:36,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:12:37,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:12:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:37,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:12:38,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:38,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982443015] [2021-11-07 01:12:38,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982443015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:38,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:38,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:12:38,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476827212] [2021-11-07 01:12:38,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:12:38,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:38,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:12:38,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:38,216 INFO L87 Difference]: Start difference. First operand 1269 states and 4976 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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) [2021-11-07 01:12:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:39,476 INFO L93 Difference]: Finished difference Result 2499 states and 9234 transitions. [2021-11-07 01:12:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:12:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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 31 [2021-11-07 01:12:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:39,482 INFO L225 Difference]: With dead ends: 2499 [2021-11-07 01:12:39,482 INFO L226 Difference]: Without dead ends: 2330 [2021-11-07 01:12:39,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:12:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-11-07 01:12:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 916. [2021-11-07 01:12:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9453551912568305) internal successors, (3610), 915 states have internal predecessors, (3610), 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) [2021-11-07 01:12:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3610 transitions. [2021-11-07 01:12:39,512 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3610 transitions. Word has length 31 [2021-11-07 01:12:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:39,512 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3610 transitions. [2021-11-07 01:12:39,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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) [2021-11-07 01:12:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3610 transitions. [2021-11-07 01:12:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:12:39,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:39,515 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:39,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:12:39,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:39,716 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1741041661, now seen corresponding path program 1 times [2021-11-07 01:12:39,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:39,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365877379] [2021-11-07 01:12:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:39,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:39,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:39,719 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:39,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:12:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:12:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:40,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:41,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:41,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365877379] [2021-11-07 01:12:41,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365877379] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:41,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:41,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-07 01:12:41,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600087563] [2021-11-07 01:12:41,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:12:41,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:41,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:12:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:12:41,232 INFO L87 Difference]: Start difference. First operand 916 states and 3610 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-07 01:12:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:41,799 INFO L93 Difference]: Finished difference Result 1226 states and 4852 transitions. [2021-11-07 01:12:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:12:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2021-11-07 01:12:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:41,802 INFO L225 Difference]: With dead ends: 1226 [2021-11-07 01:12:41,802 INFO L226 Difference]: Without dead ends: 1226 [2021-11-07 01:12:41,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:12:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-11-07 01:12:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 824. [2021-11-07 01:12:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.902794653705954) internal successors, (3212), 823 states have internal predecessors, (3212), 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) [2021-11-07 01:12:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 3212 transitions. [2021-11-07 01:12:41,821 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 3212 transitions. Word has length 33 [2021-11-07 01:12:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:41,821 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 3212 transitions. [2021-11-07 01:12:41,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-07 01:12:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 3212 transitions. [2021-11-07 01:12:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:12:41,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:41,824 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:41,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 01:12:42,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:42,025 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash -861353041, now seen corresponding path program 1 times [2021-11-07 01:12:42,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:42,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497919670] [2021-11-07 01:12:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:42,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:42,026 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:42,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:12:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:12:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:12:43,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:12:43,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:43,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497919670] [2021-11-07 01:12:43,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497919670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:43,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061784789] [2021-11-07 01:12:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:43,753 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:43,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:43,754 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:43,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:12:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:44,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:12:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:12:45,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:12:45,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061784789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:45,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731242154] [2021-11-07 01:12:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:45,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:12:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:12:45,826 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:12:45,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 01:12:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:46,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:12:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:12:47,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:12:48,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731242154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:48,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:12:48,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 8, 8] total 21 [2021-11-07 01:12:48,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989862306] [2021-11-07 01:12:48,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 01:12:48,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 01:12:48,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:12:48,028 INFO L87 Difference]: Start difference. First operand 824 states and 3212 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 21 states have internal predecessors, (128), 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) [2021-11-07 01:12:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:49,405 INFO L93 Difference]: Finished difference Result 2404 states and 9472 transitions. [2021-11-07 01:12:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:12:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 21 states have internal predecessors, (128), 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 33 [2021-11-07 01:12:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:49,412 INFO L225 Difference]: With dead ends: 2404 [2021-11-07 01:12:49,412 INFO L226 Difference]: Without dead ends: 2404 [2021-11-07 01:12:49,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:12:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-11-07 01:12:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1072. [2021-11-07 01:12:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.9402427637721757) internal successors, (4220), 1071 states have internal predecessors, (4220), 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) [2021-11-07 01:12:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 4220 transitions. [2021-11-07 01:12:49,445 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 4220 transitions. Word has length 33 [2021-11-07 01:12:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:49,446 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 4220 transitions. [2021-11-07 01:12:49,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 21 states have internal predecessors, (128), 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) [2021-11-07 01:12:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 4220 transitions. [2021-11-07 01:12:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:12:49,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:49,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:49,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:49,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 01:12:49,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-07 01:12:50,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:12:50,057 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:50,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1102495573, now seen corresponding path program 2 times [2021-11-07 01:12:50,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:50,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345627038] [2021-11-07 01:12:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:12:50,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:50,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:50,058 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:50,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:12:51,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:51,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:51,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:51,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:51,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:51,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345627038] [2021-11-07 01:12:51,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345627038] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:51,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:51,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 01:12:51,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278781002] [2021-11-07 01:12:51,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:51,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:51,663 INFO L87 Difference]: Start difference. First operand 1072 states and 4220 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-11-07 01:12:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:52,073 INFO L93 Difference]: Finished difference Result 1684 states and 6566 transitions. [2021-11-07 01:12:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:12:52,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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 33 [2021-11-07 01:12:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:52,078 INFO L225 Difference]: With dead ends: 1684 [2021-11-07 01:12:52,079 INFO L226 Difference]: Without dead ends: 1644 [2021-11-07 01:12:52,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-11-07 01:12:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1204. [2021-11-07 01:12:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.9767248545303406) internal successors, (4784), 1203 states have internal predecessors, (4784), 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) [2021-11-07 01:12:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 4784 transitions. [2021-11-07 01:12:52,117 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 4784 transitions. Word has length 33 [2021-11-07 01:12:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:52,117 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 4784 transitions. [2021-11-07 01:12:52,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-11-07 01:12:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 4784 transitions. [2021-11-07 01:12:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:12:52,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:52,123 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:52,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:52,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:52,338 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1496005005, now seen corresponding path program 3 times [2021-11-07 01:12:52,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:52,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343961407] [2021-11-07 01:12:52,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:12:52,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:52,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:52,341 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:52,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:12:53,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:12:53,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:53,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:53,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:53,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:53,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343961407] [2021-11-07 01:12:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343961407] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:53,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:53,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-07 01:12:53,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078503923] [2021-11-07 01:12:53,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:53,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:53,914 INFO L87 Difference]: Start difference. First operand 1204 states and 4784 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-07 01:12:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:54,092 INFO L93 Difference]: Finished difference Result 1546 states and 6116 transitions. [2021-11-07 01:12:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:12:54,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2021-11-07 01:12:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:54,096 INFO L225 Difference]: With dead ends: 1546 [2021-11-07 01:12:54,096 INFO L226 Difference]: Without dead ends: 1546 [2021-11-07 01:12:54,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:12:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-11-07 01:12:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1192. [2021-11-07 01:12:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 3.9764903442485307) internal successors, (4736), 1191 states have internal predecessors, (4736), 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) [2021-11-07 01:12:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 4736 transitions. [2021-11-07 01:12:54,123 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 4736 transitions. Word has length 33 [2021-11-07 01:12:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:54,124 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 4736 transitions. [2021-11-07 01:12:54,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-07 01:12:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 4736 transitions. [2021-11-07 01:12:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:12:54,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:54,128 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:54,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:54,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:54,335 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 719901953, now seen corresponding path program 4 times [2021-11-07 01:12:54,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:54,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053751057] [2021-11-07 01:12:54,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:12:54,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:54,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:54,337 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:54,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:12:55,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:12:55,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:55,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:55,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:55,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:55,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:55,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053751057] [2021-11-07 01:12:55,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053751057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:55,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:55,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 01:12:55,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667270842] [2021-11-07 01:12:55,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:12:55,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:12:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:12:55,486 INFO L87 Difference]: Start difference. First operand 1192 states and 4736 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-11-07 01:12:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:55,781 INFO L93 Difference]: Finished difference Result 1662 states and 6446 transitions. [2021-11-07 01:12:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:12:55,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 33 [2021-11-07 01:12:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:55,785 INFO L225 Difference]: With dead ends: 1662 [2021-11-07 01:12:55,785 INFO L226 Difference]: Without dead ends: 1582 [2021-11-07 01:12:55,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:12:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-11-07 01:12:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1152. [2021-11-07 01:12:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.9652476107732406) internal successors, (4564), 1151 states have internal predecessors, (4564), 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) [2021-11-07 01:12:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 4564 transitions. [2021-11-07 01:12:55,816 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 4564 transitions. Word has length 33 [2021-11-07 01:12:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:55,816 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 4564 transitions. [2021-11-07 01:12:55,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-11-07 01:12:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 4564 transitions. [2021-11-07 01:12:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:12:55,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:55,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:55,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:56,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:56,035 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash 154522329, now seen corresponding path program 5 times [2021-11-07 01:12:56,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:56,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720278555] [2021-11-07 01:12:56,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:12:56,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:56,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:56,037 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:56,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:12:57,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:57,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:57,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:57,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:57,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720278555] [2021-11-07 01:12:57,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720278555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:57,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:57,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 01:12:57,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704735047] [2021-11-07 01:12:57,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:57,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:57,418 INFO L87 Difference]: Start difference. First operand 1152 states and 4564 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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) [2021-11-07 01:12:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:57,790 INFO L93 Difference]: Finished difference Result 1564 states and 6208 transitions. [2021-11-07 01:12:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:12:57,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 33 [2021-11-07 01:12:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:57,794 INFO L225 Difference]: With dead ends: 1564 [2021-11-07 01:12:57,794 INFO L226 Difference]: Without dead ends: 1524 [2021-11-07 01:12:57,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-11-07 01:12:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1072. [2021-11-07 01:12:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.9402427637721757) internal successors, (4220), 1071 states have internal predecessors, (4220), 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) [2021-11-07 01:12:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 4220 transitions. [2021-11-07 01:12:57,819 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 4220 transitions. Word has length 33 [2021-11-07 01:12:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:57,819 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 4220 transitions. [2021-11-07 01:12:57,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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) [2021-11-07 01:12:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 4220 transitions. [2021-11-07 01:12:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:12:57,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:57,822 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:57,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:58,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:58,022 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash -238987103, now seen corresponding path program 6 times [2021-11-07 01:12:58,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:58,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233051680] [2021-11-07 01:12:58,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:12:58,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:58,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:58,024 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:58,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:12:59,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:12:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:59,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:59,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:12:59,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:59,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233051680] [2021-11-07 01:12:59,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233051680] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:12:59,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:12:59,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-07 01:12:59,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294654793] [2021-11-07 01:12:59,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:59,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:59,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:59,414 INFO L87 Difference]: Start difference. First operand 1072 states and 4220 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-07 01:12:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:59,584 INFO L93 Difference]: Finished difference Result 1630 states and 6170 transitions. [2021-11-07 01:12:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:12:59,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2021-11-07 01:12:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:59,588 INFO L225 Difference]: With dead ends: 1630 [2021-11-07 01:12:59,588 INFO L226 Difference]: Without dead ends: 1630 [2021-11-07 01:12:59,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:12:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-11-07 01:12:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 964. [2021-11-07 01:12:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.8816199376947043) internal successors, (3738), 963 states have internal predecessors, (3738), 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) [2021-11-07 01:12:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3738 transitions. [2021-11-07 01:12:59,614 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3738 transitions. Word has length 33 [2021-11-07 01:12:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:59,614 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 3738 transitions. [2021-11-07 01:12:59,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-07 01:12:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3738 transitions. [2021-11-07 01:12:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:12:59,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:59,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:59,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-07 01:12:59,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:59,835 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:12:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1405412519, now seen corresponding path program 1 times [2021-11-07 01:12:59,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:59,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446353360] [2021-11-07 01:12:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:59,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:59,837 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:59,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:13:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:01,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:13:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:01,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:13:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:13:01,237 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 167 treesize of output 159 [2021-11-07 01:13:01,729 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-11-07 01:13:01,729 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 3 case distinctions, treesize of input 35 treesize of output 43 [2021-11-07 01:21:12,552 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-07 01:21:12,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:12,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446353360] [2021-11-07 01:21:12,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-07 01:21:12,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151684195] [2021-11-07 01:21:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:12,554 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:12,558 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:12,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-07 01:21:12,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:21:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:15,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 01:21:15,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:15,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-07 01:21:15,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687768810] [2021-11-07 01:21:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:15,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:21:15,027 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:21:15,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 01:21:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 01:21:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:16,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-07 01:21:16,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:16,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 01:21:16,367 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-07 01:21:16,367 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 01:21:16,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:16,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 01:21:16,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-07 01:21:16,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-11-07 01:21:16,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-11-07 01:21:16,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-07 01:21:16,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:16,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:16,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a0b72b-3518-4c5c-8f80-2c4f13dff5a9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:16,975 INFO L731 BasicCegarLoop]: Path program histogram: [8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:16,978 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-07 01:21:16,978 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:21:17,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:21:17 BasicIcfg [2021-11-07 01:21:17,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:21:17,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:21:17,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:21:17,010 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:21:17,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:27" (3/4) ... [2021-11-07 01:21:17,015 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:21:17,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:21:17,017 INFO L168 Benchmark]: Toolchain (without parser) took 591411.80 ms. Allocated memory was 62.9 MB in the beginning and 413.1 MB in the end (delta: 350.2 MB). Free memory was 42.5 MB in the beginning and 258.7 MB in the end (delta: -216.3 MB). Peak memory consumption was 133.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:17,017 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:21:17,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.34 ms. Allocated memory is still 62.9 MB. Free memory was 42.3 MB in the beginning and 41.3 MB in the end (delta: 989.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:17,019 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.46 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 38.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:17,019 INFO L168 Benchmark]: Boogie Preprocessor took 61.53 ms. Allocated memory is still 62.9 MB. Free memory was 38.6 MB in the beginning and 36.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:17,019 INFO L168 Benchmark]: RCFGBuilder took 1739.10 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 36.5 MB in the beginning and 59.3 MB in the end (delta: -22.9 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:17,020 INFO L168 Benchmark]: TraceAbstraction took 589128.68 ms. Allocated memory was 92.3 MB in the beginning and 413.1 MB in the end (delta: 320.9 MB). Free memory was 58.9 MB in the beginning and 258.7 MB in the end (delta: -199.8 MB). Peak memory consumption was 120.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:17,020 INFO L168 Benchmark]: Witness Printer took 9.25 ms. Allocated memory is still 413.1 MB. Free memory is still 258.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:21:17,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 409.34 ms. Allocated memory is still 62.9 MB. Free memory was 42.3 MB in the beginning and 41.3 MB in the end (delta: 989.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.46 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 38.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.53 ms. Allocated memory is still 62.9 MB. Free memory was 38.6 MB in the beginning and 36.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1739.10 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 36.5 MB in the beginning and 59.3 MB in the end (delta: -22.9 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 589128.68 ms. Allocated memory was 92.3 MB in the beginning and 413.1 MB in the end (delta: 320.9 MB). Free memory was 58.9 MB in the beginning and 258.7 MB in the end (delta: -199.8 MB). Peak memory consumption was 120.4 MB. Max. memory is 16.1 GB. * Witness Printer took 9.25 ms. Allocated memory is still 413.1 MB. Free memory is still 258.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 26.8s, 196 PlacesBefore, 47 PlacesAfterwards, 201 TransitionsBefore, 40 TransitionsAfterwards, 1824 CoEnabledTransitionPairs, 7 FixpointIterations, 124 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 8 ConcurrentYvCompositions, 12 ChoiceCompositions, 190 TotalNumberOfCompositions, 2936 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2432, positive: 2362, positive conditional: 0, positive unconditional: 2362, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1198, positive: 1179, positive conditional: 0, positive unconditional: 1179, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1198, positive: 1177, positive conditional: 0, positive unconditional: 1177, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 21, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1016, positive: 198, positive conditional: 0, positive unconditional: 198, negative: 817, negative conditional: 0, negative unconditional: 817, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2432, positive: 1183, positive conditional: 0, positive unconditional: 1183, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 1198, unknown conditional: 0, unknown unconditional: 1198] , Statistics on independence cache: Total cache size (in pairs): 163, Positive cache size: 155, Positive conditional cache size: 0, Positive unconditional cache size: 155, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 148]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 int *q1, *q2; [L42] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, C, total; [L122] 0 pthread_t t1, t2, t3, t4; [L124] 0 C = __VERIFIER_nondet_int() [L125] 0 N = __VERIFIER_nondet_int() [L126] 0 n1 = __VERIFIER_nondet_int() [L127] 0 n2 = __VERIFIER_nondet_int() [L128] 0 q1_front = __VERIFIER_nondet_int() [L129] 0 q1_back = q1_front [L130] 0 q2_front = __VERIFIER_nondet_int() [L131] 0 q2_back = q2_front [L38] COND TRUE 0 !cond [L38] COND TRUE 0 !cond [L157] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L158] 0 int i = 0; [L158] COND TRUE 0 i < size [L159] 0 arr[i] = __VERIFIER_nondet_int() [L158] 0 i++ [L161] 0 return arr; [L132] 0 q1 = create_fresh_int_array(n1) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L157] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L158] 0 int i = 0; [L158] COND TRUE 0 i < size [L159] 0 arr[i] = __VERIFIER_nondet_int() [L158] 0 i++ [L158] COND FALSE 0 !(i < size) [L161] 0 return arr; [L133] 0 q2 = create_fresh_int_array(n2) [L38] COND FALSE 0 !(!cond) [L138] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L49] 1 _Bool cond = i < N; [L51] COND TRUE 1 \read(cond) [L38] COND FALSE 1 !(!cond) [L54] 1 q1[q1_back] [L38] COND TRUE 1 !cond [L55] 1 q1_back++ [L56] 1 i++ [L59] 1 cond = i < N [L63] 1 return 0; [L139] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L68] 2 _Bool cond = j < N; [L70] COND TRUE 2 \read(cond) [L38] COND FALSE 2 !(!cond) [L73] 2 q2[q2_back] [L38] COND FALSE 2 !(!cond) [L74] 2 q2_back++ [L75] 2 j++ [L78] 2 cond = j < N [L70] COND FALSE 2 !(\read(cond)) [L82] 2 return 0; [L140] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L141] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L105] 4 _Bool cond = j < N || q2_front < q2_back; [L107] COND TRUE 4 \read(cond) [L38] COND TRUE 4 !cond [L110] EXPR 4 q2[q2_front] [L38] COND TRUE 4 !cond [L38] COND TRUE 4 !cond [L167] 4 return a + b; [L110] 4 total = plus(total, q2[q2_front]) [L111] 4 q2_front++ [L142] 0 \read(t1) [L142] FCALL, JOIN 1 pthread_join(t1, 0) [L143] 0 \read(t2) [L143] FCALL, JOIN 2 pthread_join(t2, 0) [L144] 0 \read(t3) [L114] 4 cond = j < N || q2_front < q2_back [L107] COND FALSE 4 !(\read(cond)) [L118] 4 return 0; [L87] 3 _Bool cond = i < N || q1_front < q1_back; [L89] COND TRUE 3 \read(cond) [L38] COND TRUE 3 !cond [L92] EXPR 3 q1[q1_front] [L38] COND FALSE 3 !(!cond) [L38] COND FALSE 3 !(!cond) [L167] 3 return a + b; [L92] 3 total = plus(total, q1[q1_front]) [L93] 3 q1_front++ [L96] 3 cond = i < N || q1_front < q1_back [L100] 3 return 0; [L144] FCALL, JOIN 3 pthread_join(t3, 0) [L145] 0 \read(t4) [L145] FCALL, JOIN 4 pthread_join(t4, 0) [L38] COND TRUE 0 !cond [L148] 0 reach_error() - UnprovableResult [Line: 140]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 138]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 141]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 139]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 216 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 588.9s, OverallIterations: 28, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.1s, AutomataDifference: 16.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 26.9s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1710 SDtfs, 4644 SDslu, 6540 SDs, 0 SdLazy, 4059 SolverSat, 397 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2183 GetRequests, 1785 SyntacticMatches, 1 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1932occurred in iteration=8, InterpolantAutomatonStates: 318, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 27 MinimizatonAttempts, 20240 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 510.1s InterpolantComputationTime, 1066 NumberOfCodeBlocks, 1066 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1996 ConstructedInterpolants, 8 QuantifiedInterpolants, 10957 SizeOfPredicates, 293 NumberOfNonLiveVariables, 5375 ConjunctsInSsa, 339 ConjunctsInUnsatCore, 66 InterpolantComputations, 40 PerfectInterpolantSequences, 185/216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN