./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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_058bda81-288d-4550-8e4c-d404274b9507/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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:20:21,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:20:21,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:20:21,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:20:21,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:20:21,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:20:21,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:20:21,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:20:21,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:20:21,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:20:21,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:20:21,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:20:21,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:20:21,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:20:21,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:20:21,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:20:21,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:20:21,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:20:21,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:20:21,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:20:21,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:20:21,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:20:21,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:20:21,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:20:21,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:20:21,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:20:21,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:20:21,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:20:21,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:20:21,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:20:21,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:20:21,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:20:21,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:20:21,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:20:21,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:20:21,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:20:21,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:20:21,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:20:21,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:20:21,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:20:21,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:20:21,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:20:21,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:20:21,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:20:21,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:20:21,241 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:20:21,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:20:21,241 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:20:21,241 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:20:21,242 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:20:21,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:20:21,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:20:21,243 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:20:21,243 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:20:21,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:20:21,244 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:20:21,244 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:20:21,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:20:21,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:20:21,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:20:21,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:20:21,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:20:21,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:20:21,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:20:21,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:20:21,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:20:21,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:20:21,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:20:21,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:20:21,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:20:21,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:20:21,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:20:21,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:20:21,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:20:21,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:20:21,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:20:21,250 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:20:21,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:20:21,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:20:21,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:20:21,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:20:21,251 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_058bda81-288d-4550-8e4c-d404274b9507/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2021-11-07 02:20:21,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:20:21,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:20:21,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:20:21,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:20:21,520 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:20:21,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-11-07 02:20:21,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/26d322efc/2872e16aed7242f29ec91fa18b06eff0/FLAGd4da9c170 [2021-11-07 02:20:22,102 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:20:22,102 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-11-07 02:20:22,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/26d322efc/2872e16aed7242f29ec91fa18b06eff0/FLAGd4da9c170 [2021-11-07 02:20:22,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/26d322efc/2872e16aed7242f29ec91fa18b06eff0 [2021-11-07 02:20:22,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:20:22,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:20:22,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:22,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:20:22,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:20:22,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:22" (1/1) ... [2021-11-07 02:20:22,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f4806f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:22, skipping insertion in model container [2021-11-07 02:20:22,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:22" (1/1) ... [2021-11-07 02:20:22,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:20:22,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:20:22,714 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_058bda81-288d-4550-8e4c-d404274b9507/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-11-07 02:20:22,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:22,733 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 02:20:22,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51277108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:22, skipping insertion in model container [2021-11-07 02:20:22,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:22,734 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:20:22,737 INFO L168 Benchmark]: Toolchain (without parser) took 262.00 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 65.7 MB in the beginning and 111.8 MB in the end (delta: -46.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:20:22,738 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:20:22,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.46 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 65.5 MB in the beginning and 111.8 MB in the end (delta: -46.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:20:22,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 253.46 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 65.5 MB in the beginning and 111.8 MB in the end (delta: -46.3 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: 114]: 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_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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_058bda81-288d-4550-8e4c-d404274b9507/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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:20:25,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:20:25,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:20:25,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:20:25,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:20:25,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:20:25,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:20:25,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:20:25,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:20:25,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:20:25,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:20:25,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:20:25,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:20:25,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:20:25,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:20:25,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:20:25,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:20:25,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:20:25,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:20:25,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:20:25,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:20:25,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:20:25,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:20:25,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:20:25,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:20:25,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:20:25,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:20:25,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:20:25,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:20:25,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:20:25,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:20:25,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:20:25,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:20:25,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:20:25,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:20:25,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:20:25,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:20:25,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:20:25,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:20:25,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:20:25,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:20:25,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:20:25,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:20:25,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:20:25,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:20:25,163 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:20:25,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:20:25,164 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:20:25,164 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:20:25,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:20:25,164 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:20:25,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:20:25,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:20:25,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:20:25,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:20:25,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:20:25,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:20:25,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:20:25,167 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:20:25,167 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:20:25,167 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:20:25,167 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:20:25,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:20:25,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:20:25,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:20:25,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:20:25,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:20:25,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:20:25,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:20:25,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:20:25,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:20:25,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:20:25,170 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:20:25,170 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:25,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:20:25,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:20:25,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:20:25,171 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_058bda81-288d-4550-8e4c-d404274b9507/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2021-11-07 02:20:25,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:20:25,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:20:25,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:20:25,593 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:20:25,594 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:20:25,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-11-07 02:20:25,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/eef9d72af/23413e9b7d04496dbeb1fb8df4a61360/FLAG91b835d46 [2021-11-07 02:20:26,282 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:20:26,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-11-07 02:20:26,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/eef9d72af/23413e9b7d04496dbeb1fb8df4a61360/FLAG91b835d46 [2021-11-07 02:20:26,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/data/eef9d72af/23413e9b7d04496dbeb1fb8df4a61360 [2021-11-07 02:20:26,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:20:26,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:20:26,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:26,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:20:26,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:20:26,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:26" (1/1) ... [2021-11-07 02:20:26,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385d2b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:26, skipping insertion in model container [2021-11-07 02:20:26,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:26" (1/1) ... [2021-11-07 02:20:26,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:20:26,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:20:26,920 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_058bda81-288d-4550-8e4c-d404274b9507/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-11-07 02:20:26,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:26,944 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:20:26,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:20:26,969 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_058bda81-288d-4550-8e4c-d404274b9507/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-11-07 02:20:26,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:26,978 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:20:27,002 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_058bda81-288d-4550-8e4c-d404274b9507/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-11-07 02:20:27,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:27,022 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:20:27,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27 WrapperNode [2021-11-07 02:20:27,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:27,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:20:27,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:20:27,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:20:27,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:20:27,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:20:27,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:20:27,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:20:27,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:20:27,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:20:27,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:20:27,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:20:27,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (1/1) ... [2021-11-07 02:20:27,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:20:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:20:27,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:20:27,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:20:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:20:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:20:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:20:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 02:20:27,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 02:20:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 02:20:27,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 02:20:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 02:20:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 02:20:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:20:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:20:27,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:20:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:20:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:20:27,214 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 02:20:28,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:20:28,218 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-11-07 02:20:28,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:20:28 BoogieIcfgContainer [2021-11-07 02:20:28,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:20:28,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:20:28,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:20:28,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:20:28,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:20:26" (1/3) ... [2021-11-07 02:20:28,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467bc99c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:20:28, skipping insertion in model container [2021-11-07 02:20:28,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:27" (2/3) ... [2021-11-07 02:20:28,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467bc99c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:20:28, skipping insertion in model container [2021-11-07 02:20:28,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:20:28" (3/3) ... [2021-11-07 02:20:28,233 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2021-11-07 02:20:28,238 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 02:20:28,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:20:28,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:20:28,239 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 02:20:28,289 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,289 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,290 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,290 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,290 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,291 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,291 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,292 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,292 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,292 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,292 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,293 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,293 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,293 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,294 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,294 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,294 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,296 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,297 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,299 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,299 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,300 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,300 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,301 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,301 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,301 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,301 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,302 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,302 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,302 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,302 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,303 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,303 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,303 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,304 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,305 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,305 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,305 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,305 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,306 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,306 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,315 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,316 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,316 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,316 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,317 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,318 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,318 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,318 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,318 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,327 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,329 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,329 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,334 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,335 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,335 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:20:28,348 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-07 02:20:28,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:20:28,401 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 02:20:28,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 02:20:28,416 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 02:20:28,427 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 127 transitions, 270 flow [2021-11-07 02:20:28,430 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 127 transitions, 270 flow [2021-11-07 02:20:28,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 270 flow [2021-11-07 02:20:28,494 INFO L129 PetriNetUnfolder]: 11/125 cut-off events. [2021-11-07 02:20:28,494 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-07 02:20:28,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 91. Up to 3 conditions per place. [2021-11-07 02:20:28,501 INFO L116 LiptonReduction]: Number of co-enabled transitions 690 [2021-11-07 02:20:41,984 INFO L131 LiptonReduction]: Checked pairs total: 853 [2021-11-07 02:20:41,985 INFO L133 LiptonReduction]: Total number of compositions: 134 [2021-11-07 02:20:41,993 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 20 transitions, 56 flow [2021-11-07 02:20:42,004 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:20:42,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:42,013 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:42,013 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:42,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash 70358785, now seen corresponding path program 1 times [2021-11-07 02:20:42,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:42,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536885516] [2021-11-07 02:20:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:42,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:42,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:42,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:20:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:42,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:20:42,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:42,426 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 02:20:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:42,498 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 02:20:42,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:42,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536885516] [2021-11-07 02:20:42,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536885516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:42,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:42,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:20:42,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686454291] [2021-11-07 02:20:42,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:42,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:42,523 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:42,696 INFO L93 Difference]: Finished difference Result 49 states and 96 transitions. [2021-11-07 02:20:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:42,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 02:20:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:42,709 INFO L225 Difference]: With dead ends: 49 [2021-11-07 02:20:42,709 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 02:20:42,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 02:20:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 02:20:42,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 02:20:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 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 02:20:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 76 transitions. [2021-11-07 02:20:42,751 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 76 transitions. Word has length 14 [2021-11-07 02:20:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:42,752 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 76 transitions. [2021-11-07 02:20:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 76 transitions. [2021-11-07 02:20:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:20:42,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:42,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:42,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:42,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:42,969 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1367908843, now seen corresponding path program 1 times [2021-11-07 02:20:42,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:42,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74780687] [2021-11-07 02:20:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:42,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:42,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:42,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:42,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:20:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:43,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:20:43,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:43,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:43,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:43,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74780687] [2021-11-07 02:20:43,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74780687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:43,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:43,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 12 [2021-11-07 02:20:43,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979875555] [2021-11-07 02:20:43,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:20:43,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:20:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:20:43,967 INFO L87 Difference]: Start difference. First operand 36 states and 76 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:44,582 INFO L93 Difference]: Finished difference Result 79 states and 178 transitions. [2021-11-07 02:20:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:20:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:20:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:44,585 INFO L225 Difference]: With dead ends: 79 [2021-11-07 02:20:44,585 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 02:20:44,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:20:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 02:20:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2021-11-07 02:20:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 105 transitions. [2021-11-07 02:20:44,595 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 105 transitions. Word has length 15 [2021-11-07 02:20:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 105 transitions. [2021-11-07 02:20:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 105 transitions. [2021-11-07 02:20:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:20:44,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:44,597 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:44,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:44,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:44,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash -159883765, now seen corresponding path program 2 times [2021-11-07 02:20:44,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:44,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294790695] [2021-11-07 02:20:44,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:20:44,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:44,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:44,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:44,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:20:44,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 02:20:44,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:20:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:20:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:45,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:45,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:45,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294790695] [2021-11-07 02:20:45,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294790695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:45,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:45,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 12 [2021-11-07 02:20:45,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505076700] [2021-11-07 02:20:45,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:20:45,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:20:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:20:45,619 INFO L87 Difference]: Start difference. First operand 50 states and 105 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:46,101 INFO L93 Difference]: Finished difference Result 75 states and 178 transitions. [2021-11-07 02:20:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:20:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:20:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:46,103 INFO L225 Difference]: With dead ends: 75 [2021-11-07 02:20:46,103 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 02:20:46,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:20:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 02:20:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-11-07 02:20:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:20:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-11-07 02:20:46,117 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 15 [2021-11-07 02:20:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:46,118 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-11-07 02:20:46,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-11-07 02:20:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:20:46,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:46,119 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:46,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:46,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:46,320 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 477979985, now seen corresponding path program 3 times [2021-11-07 02:20:46,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:46,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130226942] [2021-11-07 02:20:46,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:20:46,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:46,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:46,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:46,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:20:46,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-07 02:20:46,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:20:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:46,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:46,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:46,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:46,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130226942] [2021-11-07 02:20:46,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130226942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:46,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:46,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:20:46,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813211263] [2021-11-07 02:20:46,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:46,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:46,677 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:20:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:46,726 INFO L93 Difference]: Finished difference Result 52 states and 108 transitions. [2021-11-07 02:20:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:20:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:46,728 INFO L225 Difference]: With dead ends: 52 [2021-11-07 02:20:46,728 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 02:20:46,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 02:20:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 02:20:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-07 02:20:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 51 states have internal predecessors, (108), 0 states have call successors, (0), 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 02:20:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 108 transitions. [2021-11-07 02:20:46,735 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 108 transitions. Word has length 15 [2021-11-07 02:20:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:46,735 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 108 transitions. [2021-11-07 02:20:46,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:20:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 108 transitions. [2021-11-07 02:20:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:20:46,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:46,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:46,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:46,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:46,949 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1698737141, now seen corresponding path program 4 times [2021-11-07 02:20:46,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:46,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986146130] [2021-11-07 02:20:46,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:20:46,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:46,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:46,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:20:47,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:20:47,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:20:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:20:47,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:47,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:47,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:47,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986146130] [2021-11-07 02:20:47,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986146130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:47,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:47,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 12 [2021-11-07 02:20:47,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121317271] [2021-11-07 02:20:47,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:20:47,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:20:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:20:47,782 INFO L87 Difference]: Start difference. First operand 52 states and 108 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:48,295 INFO L93 Difference]: Finished difference Result 67 states and 143 transitions. [2021-11-07 02:20:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:20:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:20:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:48,297 INFO L225 Difference]: With dead ends: 67 [2021-11-07 02:20:48,297 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 02:20:48,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:20:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 02:20:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-11-07 02:20:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 103 transitions. [2021-11-07 02:20:48,303 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 103 transitions. Word has length 15 [2021-11-07 02:20:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 103 transitions. [2021-11-07 02:20:48,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 103 transitions. [2021-11-07 02:20:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:20:48,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:48,305 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:48,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:48,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:48,506 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:48,506 INFO L85 PathProgramCache]: Analyzing trace with hash -153238860, now seen corresponding path program 1 times [2021-11-07 02:20:48,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:48,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543122103] [2021-11-07 02:20:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:48,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:48,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:48,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:48,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:20:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:48,828 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 02:20:48,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:49,008 INFO L354 Elim1Store]: treesize reduction 484, result has 1.4 percent of original size [2021-11-07 02:20:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2021-11-07 02:20:49,069 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 02:20:49,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:49,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543122103] [2021-11-07 02:20:49,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543122103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:49,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:49,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:49,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289586403] [2021-11-07 02:20:49,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:49,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:49,071 INFO L87 Difference]: Start difference. First operand 50 states and 103 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:49,183 INFO L93 Difference]: Finished difference Result 59 states and 114 transitions. [2021-11-07 02:20:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 02:20:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:49,185 INFO L225 Difference]: With dead ends: 59 [2021-11-07 02:20:49,185 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 02:20:49,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 02:20:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-07 02:20:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 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 02:20:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 98 transitions. [2021-11-07 02:20:49,191 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 98 transitions. Word has length 16 [2021-11-07 02:20:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:49,191 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 98 transitions. [2021-11-07 02:20:49,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 98 transitions. [2021-11-07 02:20:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:20:49,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:49,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:49,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:49,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:49,408 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:49,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -82039220, now seen corresponding path program 1 times [2021-11-07 02:20:49,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:49,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033780828] [2021-11-07 02:20:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:49,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:49,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:49,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:49,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:20:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:49,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:49,915 INFO L354 Elim1Store]: treesize reduction 484, result has 1.4 percent of original size [2021-11-07 02:20:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2021-11-07 02:20:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:49,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:49,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033780828] [2021-11-07 02:20:49,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033780828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:49,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [246672978] [2021-11-07 02:20:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:49,967 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:49,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:49,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:49,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:20:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:20:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:50,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:50,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [246672978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:50,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303709986] [2021-11-07 02:20:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:50,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:20:50,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:20:50,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:20:50,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 02:20:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:51,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:20:51,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:51,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:51,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303709986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:51,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:20:51,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 5, 5] total 13 [2021-11-07 02:20:51,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694130581] [2021-11-07 02:20:51,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:20:51,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:20:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:20:51,502 INFO L87 Difference]: Start difference. First operand 50 states and 98 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 02:20:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:52,650 INFO L93 Difference]: Finished difference Result 107 states and 196 transitions. [2021-11-07 02:20:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:20:52,651 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 16 [2021-11-07 02:20:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:52,652 INFO L225 Difference]: With dead ends: 107 [2021-11-07 02:20:52,652 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 02:20:52,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:20:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 02:20:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-11-07 02:20:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.109090909090909) internal successors, (116), 55 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 116 transitions. [2021-11-07 02:20:52,658 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 116 transitions. Word has length 16 [2021-11-07 02:20:52,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:52,659 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 116 transitions. [2021-11-07 02:20:52,659 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 02:20:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 116 transitions. [2021-11-07 02:20:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:20:52,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:52,660 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:52,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:20:52,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:53,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-07 02:20:53,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:53,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:20:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 144693678, now seen corresponding path program 2 times [2021-11-07 02:20:53,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:53,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718085952] [2021-11-07 02:20:53,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:20:53,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:53,274 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:53,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:20:53,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:20:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:20:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:20:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:53,594 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 187 treesize of output 179 [2021-11-07 02:20:53,799 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-11-07 02:20:53,799 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 02:24:04,996 WARN L207 SmtUtils]: Spent 3.11 m on a formula simplification. DAG size of input: 375 DAG size of output: 130 [2021-11-07 02:24:04,998 INFO L354 Elim1Store]: treesize reduction 2036, result has 18.2 percent of original size [2021-11-07 02:24:05,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 121 treesize of output 497 [2021-11-07 02:28:13,111 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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 02:28:13,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:28:13,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718085952] [2021-11-07 02:28:13,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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 02:28:13,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1108596368] [2021-11-07 02:28:13,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:28:13,116 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:28:13,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:28:13,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:28:13,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-07 02:28:13,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 02:28:13,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:28:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:28:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:28:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:28:13,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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 02:28:13,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829778711] [2021-11-07 02:28:13,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:28:13,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:28:13,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:28:13,693 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:28:13,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 02:28:14,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:28:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:28:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:28:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:28:14,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/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 02:28:14,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:28:14,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 02:28:14,059 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-07 02:28:14,059 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 02:28:14,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 02:28:14,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 02:28:14,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-07 02:28:14,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:28:14,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:28:14,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:28:14,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_058bda81-288d-4550-8e4c-d404274b9507/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:28:14,670 INFO L731 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1] [2021-11-07 02:28:14,673 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-07 02:28:14,673 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 02:28:14,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:28:14 BasicIcfg [2021-11-07 02:28:14,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 02:28:14,705 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 02:28:14,705 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 02:28:14,706 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 02:28:14,707 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:20:28" (3/4) ... [2021-11-07 02:28:14,709 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 02:28:14,710 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 02:28:14,711 INFO L168 Benchmark]: Toolchain (without parser) took 468073.12 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 26.3 MB in the beginning and 27.7 MB in the end (delta: -1.4 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:28:14,712 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 50.3 MB. Free memory was 30.1 MB in the beginning and 30.1 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:28:14,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.16 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 26.0 MB in the beginning and 47.9 MB in the end (delta: -21.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:28:14,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.30 ms. Allocated memory is still 69.2 MB. Free memory was 47.7 MB in the beginning and 45.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:28:14,716 INFO L168 Benchmark]: Boogie Preprocessor took 40.66 ms. Allocated memory is still 69.2 MB. Free memory was 45.7 MB in the beginning and 44.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:28:14,717 INFO L168 Benchmark]: RCFGBuilder took 1108.63 ms. Allocated memory is still 69.2 MB. Free memory was 44.1 MB in the beginning and 35.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:28:14,717 INFO L168 Benchmark]: TraceAbstraction took 466482.94 ms. Allocated memory is still 69.2 MB. Free memory was 34.9 MB in the beginning and 27.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-11-07 02:28:14,718 INFO L168 Benchmark]: Witness Printer took 4.46 ms. Allocated memory is still 69.2 MB. Free memory is still 27.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:28:14,720 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 50.3 MB. Free memory was 30.1 MB in the beginning and 30.1 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 371.16 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 26.0 MB in the beginning and 47.9 MB in the end (delta: -21.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.30 ms. Allocated memory is still 69.2 MB. Free memory was 47.7 MB in the beginning and 45.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.66 ms. Allocated memory is still 69.2 MB. Free memory was 45.7 MB in the beginning and 44.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1108.63 ms. Allocated memory is still 69.2 MB. Free memory was 44.1 MB in the beginning and 35.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 466482.94 ms. Allocated memory is still 69.2 MB. Free memory was 34.9 MB in the beginning and 27.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.46 ms. Allocated memory is still 69.2 MB. Free memory is still 27.7 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: 13.5s, 123 PlacesBefore, 24 PlacesAfterwards, 127 TransitionsBefore, 20 TransitionsAfterwards, 690 CoEnabledTransitionPairs, 8 FixpointIterations, 85 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 134 TotalNumberOfCompositions, 853 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 770, positive: 743, positive conditional: 0, positive unconditional: 743, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 507, positive: 498, positive conditional: 0, positive unconditional: 498, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 507, positive: 494, positive conditional: 0, positive unconditional: 494, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 363, positive: 113, positive conditional: 0, positive unconditional: 113, negative: 250, negative conditional: 0, negative unconditional: 250, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 770, positive: 245, positive conditional: 0, positive unconditional: 245, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 507, unknown conditional: 0, unknown unconditional: 507] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 22, Positive conditional cache size: 0, Positive unconditional cache size: 22, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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: 105]: 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: [L42] 0 int* q; [L43] 0 int q_front, q_back, n, s, N; [L44] 0 unsigned int x, y, C; [L87] 0 pthread_t t1, t2; [L89] 0 C = __VERIFIER_nondet_uint() [L90] 0 N = __VERIFIER_nondet_int() [L91] 0 n = __VERIFIER_nondet_int() [L92] 0 q_front = __VERIFIER_nondet_int() [L93] 0 q_back = q_front [L39] COND FALSE 0 !(!cond) [L39] COND FALSE 0 !(!cond) [L114] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L115] 0 int i = 0; [L115] COND TRUE 0 i < size [L116] 0 arr[i] = __VERIFIER_nondet_int() [L115] 0 i++ [L115] COND TRUE 0 i < size [L116] 0 arr[i] = __VERIFIER_nondet_int() [L115] 0 i++ [L115] COND FALSE 0 !(i < size) [L118] 0 return arr; [L94] 0 q = create_fresh_int_array(n) [L39] COND FALSE 0 !(!cond) [L99] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L49] 1 int i=0; [L49] COND FALSE 1 !(i