./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs --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 c86e29a8012610d4b2f43562a87df068d320fb51 ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs --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 c86e29a8012610d4b2f43562a87df068d320fb51 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:09:29,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:09:29,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:09:29,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:09:29,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:09:29,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:09:29,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:09:29,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:09:29,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:09:29,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:09:29,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:09:29,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:09:29,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:09:29,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:09:29,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:09:29,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:09:29,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:09:29,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:09:29,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:09:29,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:09:29,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:09:29,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:09:29,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:09:29,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:09:29,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:09:29,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:09:29,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:09:29,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:09:29,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:09:29,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:09:29,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:09:29,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:09:29,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:09:29,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:09:29,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:09:29,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:09:29,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:09:29,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:09:29,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:09:29,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:09:29,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:09:29,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:09:29,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:09:29,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:09:29,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:09:29,948 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:09:29,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:09:29,949 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:09:29,949 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:09:29,949 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:09:29,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:09:29,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:09:29,950 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:09:29,950 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:09:29,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:09:29,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:09:29,951 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:09:29,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:09:29,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:09:29,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:09:29,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:09:29,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:09:29,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:09:29,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:09:29,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:09:29,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:09:29,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:09:29,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:09:29,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:09:29,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:09:29,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:09:29,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:09:29,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:09:29,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:09:29,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:09:29,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:09:29,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:09:29,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:09:29,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:09:29,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:09:29,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:09:29,957 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_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c86e29a8012610d4b2f43562a87df068d320fb51 [2021-10-16 02:09:30,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:09:30,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:09:30,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:09:30,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:09:30,289 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:09:30,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-16 02:09:30,385 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/d1a588644/89b6d24f092d4f7987e7e4fa6fd1b8c0/FLAGe0ecc0524 [2021-10-16 02:09:30,842 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:09:30,842 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-16 02:09:30,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/d1a588644/89b6d24f092d4f7987e7e4fa6fd1b8c0/FLAGe0ecc0524 [2021-10-16 02:09:30,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/d1a588644/89b6d24f092d4f7987e7e4fa6fd1b8c0 [2021-10-16 02:09:30,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:09:30,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:09:30,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:30,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:09:30,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:09:30,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:30" (1/1) ... [2021-10-16 02:09:30,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5133bf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:30, skipping insertion in model container [2021-10-16 02:09:30,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:30" (1/1) ... [2021-10-16 02:09:30,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:09:30,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:09:31,116 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_835bbe58-1585-41df-8f8c-9210ac5cbea4/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-16 02:09:31,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:31,136 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) [2021-10-16 02:09:31,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24730547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:31, skipping insertion in model container [2021-10-16 02:09:31,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:31,138 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-16 02:09:31,140 INFO L168 Benchmark]: Toolchain (without parser) took 259.15 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.9 MB in the beginning and 83.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:31,141 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory is still 68.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:09:31,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.26 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.7 MB in the beginning and 83.1 MB in the end (delta: -32.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:31,144 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 88.1 MB. Free memory is still 68.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 253.26 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.7 MB in the beginning and 83.1 MB in the end (delta: -32.3 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: 136]: 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:09:33,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:09:33,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:09:33,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:09:33,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:09:33,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:09:33,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:09:33,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:09:33,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:09:33,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:09:33,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:09:33,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:09:33,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:09:33,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:09:33,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:09:33,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:09:33,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:09:33,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:09:33,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:09:33,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:09:33,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:09:33,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:09:33,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:09:33,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:09:33,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:09:33,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:09:33,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:09:33,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:09:33,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:09:33,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:09:33,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:09:33,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:09:33,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:09:33,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:09:33,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:09:33,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:09:33,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:09:33,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:09:33,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:09:33,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:09:33,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:09:33,516 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:09:33,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:09:33,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:09:33,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:09:33,556 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:09:33,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:09:33,556 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:09:33,556 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:09:33,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:09:33,558 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:09:33,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:09:33,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:09:33,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:09:33,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:09:33,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:09:33,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:09:33,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:09:33,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:09:33,562 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:09:33,562 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:09:33,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:09:33,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:09:33,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:09:33,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:09:33,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:09:33,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:09:33,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:09:33,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:09:33,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:09:33,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:09:33,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:09:33,565 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:09:33,565 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:33,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:09:33,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:09:33,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:09:33,566 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_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c86e29a8012610d4b2f43562a87df068d320fb51 [2021-10-16 02:09:33,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:09:33,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:09:33,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:09:33,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:09:33,957 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:09:33,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-16 02:09:34,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/1d07bd28a/89c64c062b6745b294ddb779b0cefb45/FLAG21edcf818 [2021-10-16 02:09:34,625 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:09:34,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-16 02:09:34,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/1d07bd28a/89c64c062b6745b294ddb779b0cefb45/FLAG21edcf818 [2021-10-16 02:09:35,043 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/data/1d07bd28a/89c64c062b6745b294ddb779b0cefb45 [2021-10-16 02:09:35,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:09:35,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:09:35,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:35,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:09:35,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:09:35,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0fe962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35, skipping insertion in model container [2021-10-16 02:09:35,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:09:35,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:09:35,305 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_835bbe58-1585-41df-8f8c-9210ac5cbea4/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-16 02:09:35,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:35,349 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-16 02:09:35,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:09:35,430 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_835bbe58-1585-41df-8f8c-9210ac5cbea4/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-16 02:09:35,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:35,448 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:09:35,489 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_835bbe58-1585-41df-8f8c-9210ac5cbea4/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-16 02:09:35,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:35,523 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:09:35,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35 WrapperNode [2021-10-16 02:09:35,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:35,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:09:35,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:09:35,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:09:35,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:09:35,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:09:35,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:09:35,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:09:35,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:09:35,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:09:35,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:09:35,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:09:35,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (1/1) ... [2021-10-16 02:09:35,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:09:35,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:09:35,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:09:35,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:09:35,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:09:35,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:09:35,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:09:35,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-16 02:09:35,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-16 02:09:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-16 02:09:35,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-16 02:09:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-16 02:09:35,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-16 02:09:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-16 02:09:35,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-16 02:09:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-16 02:09:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-16 02:09:35,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:09:35,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:09:35,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:09:35,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:09:35,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:09:35,794 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-16 02:09:37,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:09:37,572 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-10-16 02:09:37,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:37 BoogieIcfgContainer [2021-10-16 02:09:37,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:09:37,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:09:37,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:09:37,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:09:37,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:09:35" (1/3) ... [2021-10-16 02:09:37,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c78935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:09:37, skipping insertion in model container [2021-10-16 02:09:37,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:35" (2/3) ... [2021-10-16 02:09:37,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c78935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:09:37, skipping insertion in model container [2021-10-16 02:09:37,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:37" (3/3) ... [2021-10-16 02:09:37,591 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2021-10-16 02:09:37,597 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 02:09:37,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:09:37,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:09:37,597 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 02:09:37,656 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,657 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,657 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,657 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,658 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,658 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,658 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,658 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,658 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,658 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,659 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,659 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,659 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,659 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,659 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,659 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,660 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,660 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,660 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,660 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,660 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,661 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,661 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,661 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,661 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,661 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,669 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,671 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,671 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,671 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,672 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,672 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,672 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,672 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,673 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,673 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,673 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,673 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,673 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,674 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,675 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,675 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,675 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,675 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,675 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,676 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,676 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,676 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,676 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,676 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,676 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,677 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,677 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,677 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,677 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,678 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,678 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,678 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,678 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,678 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,678 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,678 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,679 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,679 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,679 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,679 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,679 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,680 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,684 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,684 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,684 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,684 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,684 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,685 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,685 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,685 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,685 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,685 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,685 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,686 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,688 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,688 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,688 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,688 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,689 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,689 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,689 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,689 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,691 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,691 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,691 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,691 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,691 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,692 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,692 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,692 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,692 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,692 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,692 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,693 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,695 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,695 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,695 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,695 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,695 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,696 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,696 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,696 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,696 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:09:37,704 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-16 02:09:37,756 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:09:37,765 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, mConcurrency=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 [2021-10-16 02:09:37,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 02:09:37,789 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 02:09:37,801 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 223 transitions, 478 flow [2021-10-16 02:09:37,810 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 223 transitions, 478 flow [2021-10-16 02:09:37,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 214 places, 223 transitions, 478 flow [2021-10-16 02:09:37,930 INFO L129 PetriNetUnfolder]: 22/219 cut-off events. [2021-10-16 02:09:37,930 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-16 02:09:37,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 219 events. 22/219 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2021-10-16 02:09:37,942 INFO L116 LiptonReduction]: Number of co-enabled transitions 1224 [2021-10-16 02:10:03,324 WARN L207 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 175 DAG size of output: 174 [2021-10-16 02:10:05,019 INFO L131 LiptonReduction]: Checked pairs total: 2319 [2021-10-16 02:10:05,019 INFO L133 LiptonReduction]: Total number of compositions: 226 [2021-10-16 02:10:05,026 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 38 transitions, 108 flow [2021-10-16 02:10:05,050 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 175 states, 174 states have (on average 3.8620689655172415) internal successors, (672), 174 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 174 states have (on average 3.8620689655172415) internal successors, (672), 174 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:10:05,065 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:05,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:05,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1992424902, now seen corresponding path program 1 times [2021-10-16 02:10:05,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:05,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024599694] [2021-10-16 02:10:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:05,085 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:05,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:05,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:05,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:10:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:10:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:05,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:05,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:05,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024599694] [2021-10-16 02:10:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024599694] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:05,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:05,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-16 02:10:05,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893741835] [2021-10-16 02:10:05,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:10:05,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:05,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:10:05,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:10:05,582 INFO L87 Difference]: Start difference. First operand has 175 states, 174 states have (on average 3.8620689655172415) internal successors, (672), 174 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:05,641 INFO L93 Difference]: Finished difference Result 332 states and 1303 transitions. [2021-10-16 02:10:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:10:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 02:10:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:05,657 INFO L225 Difference]: With dead ends: 332 [2021-10-16 02:10:05,657 INFO L226 Difference]: Without dead ends: 315 [2021-10-16 02:10:05,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:10:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-16 02:10:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 235. [2021-10-16 02:10:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.905982905982906) internal successors, (914), 234 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 914 transitions. [2021-10-16 02:10:05,722 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 914 transitions. Word has length 24 [2021-10-16 02:10:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:05,723 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 914 transitions. [2021-10-16 02:10:05,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 914 transitions. [2021-10-16 02:10:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:10:05,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:05,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:05,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:05,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:05,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1075556984, now seen corresponding path program 1 times [2021-10-16 02:10:05,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:05,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235528933] [2021-10-16 02:10:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:05,942 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:05,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:05,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:05,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:10:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:06,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:10:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:06,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:06,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:06,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235528933] [2021-10-16 02:10:06,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235528933] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:06,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:06,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:10:06,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855384401] [2021-10-16 02:10:06,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:10:06,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:06,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:10:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:10:06,478 INFO L87 Difference]: Start difference. First operand 235 states and 914 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:06,535 INFO L93 Difference]: Finished difference Result 531 states and 1948 transitions. [2021-10-16 02:10:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:10:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 26 [2021-10-16 02:10:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:06,545 INFO L225 Difference]: With dead ends: 531 [2021-10-16 02:10:06,545 INFO L226 Difference]: Without dead ends: 487 [2021-10-16 02:10:06,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:10:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-10-16 02:10:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 331. [2021-10-16 02:10:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.9454545454545453) internal successors, (1302), 330 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1302 transitions. [2021-10-16 02:10:06,582 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1302 transitions. Word has length 26 [2021-10-16 02:10:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:06,582 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1302 transitions. [2021-10-16 02:10:06,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1302 transitions. [2021-10-16 02:10:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:10:06,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:06,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:06,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:06,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:06,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1666493896, now seen corresponding path program 1 times [2021-10-16 02:10:06,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:06,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182296439] [2021-10-16 02:10:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:06,802 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:06,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:06,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:06,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:10:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:06,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:10:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:07,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:07,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:07,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182296439] [2021-10-16 02:10:07,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182296439] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:07,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [541765411] [2021-10-16 02:10:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:07,229 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:07,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:10:07,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:10:07,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:10:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:10:07,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:07,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:07,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [541765411] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:07,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:10:07,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [3, 3] total 8 [2021-10-16 02:10:07,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147751438] [2021-10-16 02:10:07,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:10:07,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:10:07,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:10:07,781 INFO L87 Difference]: Start difference. First operand 331 states and 1302 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:07,927 INFO L93 Difference]: Finished difference Result 632 states and 2289 transitions. [2021-10-16 02:10:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:10:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 26 [2021-10-16 02:10:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:07,935 INFO L225 Difference]: With dead ends: 632 [2021-10-16 02:10:07,935 INFO L226 Difference]: Without dead ends: 526 [2021-10-16 02:10:07,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:10:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-10-16 02:10:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 486. [2021-10-16 02:10:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.7463917525773196) internal successors, (1817), 485 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1817 transitions. [2021-10-16 02:10:07,966 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1817 transitions. Word has length 26 [2021-10-16 02:10:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:07,967 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1817 transitions. [2021-10-16 02:10:07,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1817 transitions. [2021-10-16 02:10:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:10:07,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:07,971 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:07,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:08,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:08,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:08,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:08,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1966124484, now seen corresponding path program 1 times [2021-10-16 02:10:08,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:08,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209462582] [2021-10-16 02:10:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:08,376 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:08,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:08,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:10:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:10:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:10:08,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:10:08,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:08,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209462582] [2021-10-16 02:10:08,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209462582] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:08,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:08,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:10:08,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037133646] [2021-10-16 02:10:08,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:10:08,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:10:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:10:08,851 INFO L87 Difference]: Start difference. First operand 486 states and 1817 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:08,999 INFO L93 Difference]: Finished difference Result 689 states and 2421 transitions. [2021-10-16 02:10:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:10:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 02:10:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:09,008 INFO L225 Difference]: With dead ends: 689 [2021-10-16 02:10:09,008 INFO L226 Difference]: Without dead ends: 641 [2021-10-16 02:10:09,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:10:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-10-16 02:10:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 537. [2021-10-16 02:10:09,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.7257462686567164) internal successors, (1997), 536 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1997 transitions. [2021-10-16 02:10:09,037 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1997 transitions. Word has length 27 [2021-10-16 02:10:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:09,037 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1997 transitions. [2021-10-16 02:10:09,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1997 transitions. [2021-10-16 02:10:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:10:09,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:09,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:09,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:09,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:09,262 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:09,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1067253524, now seen corresponding path program 1 times [2021-10-16 02:10:09,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:09,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185013302] [2021-10-16 02:10:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:09,263 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:09,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:09,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:09,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:10:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:09,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:10:09,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:10:09,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:10:09,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:09,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185013302] [2021-10-16 02:10:09,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185013302] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:09,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95924633] [2021-10-16 02:10:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:09,657 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:10:09,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:10:09,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:10:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:09,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:10:09,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:10,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:10,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [95924633] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:10,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137050866] [2021-10-16 02:10:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:10,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:10,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:10,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:10,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:10:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:10:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:11,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:11,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137050866] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:11,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:10:11,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 6, 7, 6, 5] total 14 [2021-10-16 02:10:11,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455102965] [2021-10-16 02:10:11,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 02:10:11,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 02:10:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:10:11,630 INFO L87 Difference]: Start difference. First operand 537 states and 1997 transitions. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:12,243 INFO L93 Difference]: Finished difference Result 1379 states and 5088 transitions. [2021-10-16 02:10:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:10:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 02:10:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:12,259 INFO L225 Difference]: With dead ends: 1379 [2021-10-16 02:10:12,260 INFO L226 Difference]: Without dead ends: 1271 [2021-10-16 02:10:12,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:10:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-10-16 02:10:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 712. [2021-10-16 02:10:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 4.0) internal successors, (2844), 711 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2844 transitions. [2021-10-16 02:10:12,319 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2844 transitions. Word has length 27 [2021-10-16 02:10:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:12,319 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2844 transitions. [2021-10-16 02:10:12,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2844 transitions. [2021-10-16 02:10:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:10:12,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:12,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:12,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:12,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:12,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-16 02:10:12,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:12,946 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1019093682, now seen corresponding path program 1 times [2021-10-16 02:10:12,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:12,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709156241] [2021-10-16 02:10:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:12,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:12,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:12,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:12,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:10:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:13,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:10:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:13,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:13,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:13,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709156241] [2021-10-16 02:10:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709156241] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:10:13,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:10:13,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-16 02:10:13,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189059793] [2021-10-16 02:10:13,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:10:13,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:13,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:10:13,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:10:13,740 INFO L87 Difference]: Start difference. First operand 712 states and 2844 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:14,135 INFO L93 Difference]: Finished difference Result 1110 states and 3840 transitions. [2021-10-16 02:10:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:10:14,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-10-16 02:10:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:14,146 INFO L225 Difference]: With dead ends: 1110 [2021-10-16 02:10:14,146 INFO L226 Difference]: Without dead ends: 946 [2021-10-16 02:10:14,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:10:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-10-16 02:10:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 614. [2021-10-16 02:10:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.7862969004893965) internal successors, (2321), 613 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2321 transitions. [2021-10-16 02:10:14,179 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2321 transitions. Word has length 28 [2021-10-16 02:10:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:14,179 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 2321 transitions. [2021-10-16 02:10:14,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2321 transitions. [2021-10-16 02:10:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:10:14,182 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:14,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:14,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:14,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:14,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2005632420, now seen corresponding path program 2 times [2021-10-16 02:10:14,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:14,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589215596] [2021-10-16 02:10:14,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:10:14,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:14,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:14,400 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:14,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:10:14,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:10:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:10:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:15,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:15,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:15,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589215596] [2021-10-16 02:10:15,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589215596] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:15,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:15,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:10:15,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480780310] [2021-10-16 02:10:15,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:10:15,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:10:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:10:15,613 INFO L87 Difference]: Start difference. First operand 614 states and 2321 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:15,987 INFO L93 Difference]: Finished difference Result 812 states and 2772 transitions. [2021-10-16 02:10:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:10:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-16 02:10:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:15,996 INFO L225 Difference]: With dead ends: 812 [2021-10-16 02:10:15,996 INFO L226 Difference]: Without dead ends: 802 [2021-10-16 02:10:15,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:10:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-10-16 02:10:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 600. [2021-10-16 02:10:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.7846410684474123) internal successors, (2267), 599 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 2267 transitions. [2021-10-16 02:10:16,040 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 2267 transitions. Word has length 28 [2021-10-16 02:10:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:16,041 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 2267 transitions. [2021-10-16 02:10:16,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 2267 transitions. [2021-10-16 02:10:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:10:16,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:16,044 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:16,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:16,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:16,257 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1090029034, now seen corresponding path program 3 times [2021-10-16 02:10:16,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:16,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344223109] [2021-10-16 02:10:16,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:10:16,259 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:16,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:16,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:16,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:10:16,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:10:16,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:10:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:17,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:17,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:17,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344223109] [2021-10-16 02:10:17,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344223109] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:17,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:17,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:10:17,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388242433] [2021-10-16 02:10:17,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:10:17,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:10:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:10:17,558 INFO L87 Difference]: Start difference. First operand 600 states and 2267 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:17,894 INFO L93 Difference]: Finished difference Result 646 states and 2262 transitions. [2021-10-16 02:10:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:10:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-16 02:10:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:17,907 INFO L225 Difference]: With dead ends: 646 [2021-10-16 02:10:17,907 INFO L226 Difference]: Without dead ends: 588 [2021-10-16 02:10:17,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:10:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-10-16 02:10:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 455. [2021-10-16 02:10:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.790748898678414) internal successors, (1721), 454 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1721 transitions. [2021-10-16 02:10:17,928 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1721 transitions. Word has length 28 [2021-10-16 02:10:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:17,928 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1721 transitions. [2021-10-16 02:10:17,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1721 transitions. [2021-10-16 02:10:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:10:17,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:17,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:17,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:18,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:18,145 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:18,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2063297347, now seen corresponding path program 1 times [2021-10-16 02:10:18,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:18,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296134628] [2021-10-16 02:10:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:18,146 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:18,147 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:18,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:10:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:10:18,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:18,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:10:19,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:19,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296134628] [2021-10-16 02:10:19,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296134628] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:10:19,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:10:19,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-16 02:10:19,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615749974] [2021-10-16 02:10:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:10:19,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:10:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:10:19,114 INFO L87 Difference]: Start difference. First operand 455 states and 1721 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:19,236 INFO L93 Difference]: Finished difference Result 561 states and 1983 transitions. [2021-10-16 02:10:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:10:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-10-16 02:10:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:19,241 INFO L225 Difference]: With dead ends: 561 [2021-10-16 02:10:19,241 INFO L226 Difference]: Without dead ends: 457 [2021-10-16 02:10:19,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:10:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-10-16 02:10:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2021-10-16 02:10:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.7785087719298245) internal successors, (1723), 456 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1723 transitions. [2021-10-16 02:10:19,259 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1723 transitions. Word has length 28 [2021-10-16 02:10:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:19,260 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1723 transitions. [2021-10-16 02:10:19,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1723 transitions. [2021-10-16 02:10:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:10:19,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:19,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:19,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-16 02:10:19,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:19,476 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1815954431, now seen corresponding path program 1 times [2021-10-16 02:10:19,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:19,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557680309] [2021-10-16 02:10:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:19,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:19,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:19,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:19,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:10:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:10:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:20,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:20,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:20,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557680309] [2021-10-16 02:10:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557680309] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:20,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896527525] [2021-10-16 02:10:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:20,356 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:10:20,359 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:10:20,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 02:10:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:10:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:21,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [896527525] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:21,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004816835] [2021-10-16 02:10:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:21,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:21,203 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:21,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:10:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:10:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:21,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:21,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004816835] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:21,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:10:21,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 3, 3] total 14 [2021-10-16 02:10:21,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317901650] [2021-10-16 02:10:21,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 02:10:21,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 02:10:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:10:21,885 INFO L87 Difference]: Start difference. First operand 457 states and 1723 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 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) [2021-10-16 02:10:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:22,411 INFO L93 Difference]: Finished difference Result 809 states and 2929 transitions. [2021-10-16 02:10:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:10:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 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) Word has length 29 [2021-10-16 02:10:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:22,419 INFO L225 Difference]: With dead ends: 809 [2021-10-16 02:10:22,419 INFO L226 Difference]: Without dead ends: 734 [2021-10-16 02:10:22,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:10:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-10-16 02:10:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 370. [2021-10-16 02:10:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.7642276422764227) internal successors, (1389), 369 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1389 transitions. [2021-10-16 02:10:22,438 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1389 transitions. Word has length 29 [2021-10-16 02:10:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:22,438 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1389 transitions. [2021-10-16 02:10:22,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 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) [2021-10-16 02:10:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1389 transitions. [2021-10-16 02:10:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-16 02:10:22,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:22,440 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:22,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:22,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-16 02:10:22,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-10-16 02:10:23,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:23,056 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash -759618039, now seen corresponding path program 1 times [2021-10-16 02:10:23,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:23,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924135004] [2021-10-16 02:10:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:23,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:23,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:23,058 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:23,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:10:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:23,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:10:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:23,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:24,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:24,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924135004] [2021-10-16 02:10:24,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924135004] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:10:24,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:10:24,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-16 02:10:24,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410443235] [2021-10-16 02:10:24,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:10:24,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:10:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:10:24,284 INFO L87 Difference]: Start difference. First operand 370 states and 1389 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:24,642 INFO L93 Difference]: Finished difference Result 510 states and 1881 transitions. [2021-10-16 02:10:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:10:24,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-16 02:10:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:24,649 INFO L225 Difference]: With dead ends: 510 [2021-10-16 02:10:24,649 INFO L226 Difference]: Without dead ends: 510 [2021-10-16 02:10:24,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:10:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-10-16 02:10:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 334. [2021-10-16 02:10:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.7387387387387387) internal successors, (1245), 333 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1245 transitions. [2021-10-16 02:10:24,664 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1245 transitions. Word has length 31 [2021-10-16 02:10:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:24,664 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1245 transitions. [2021-10-16 02:10:24,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1245 transitions. [2021-10-16 02:10:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-16 02:10:24,666 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:24,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:24,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:24,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:24,880 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1982432841, now seen corresponding path program 1 times [2021-10-16 02:10:24,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:24,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685300614] [2021-10-16 02:10:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:24,881 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:24,882 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:24,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:10:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:10:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:25,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:26,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:26,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685300614] [2021-10-16 02:10:26,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685300614] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:26,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2125087806] [2021-10-16 02:10:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:26,033 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:10:26,033 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:10:26,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:10:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:10:26,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:27,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:27,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2125087806] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:27,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690191540] [2021-10-16 02:10:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:27,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:27,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:27,251 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:27,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:10:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:10:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:28,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:10:28,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690191540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:28,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:10:28,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-10-16 02:10:28,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622393097] [2021-10-16 02:10:28,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:10:28,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:10:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:10:28,372 INFO L87 Difference]: Start difference. First operand 334 states and 1245 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:28,682 INFO L93 Difference]: Finished difference Result 736 states and 2822 transitions. [2021-10-16 02:10:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:10:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-16 02:10:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:28,692 INFO L225 Difference]: With dead ends: 736 [2021-10-16 02:10:28,692 INFO L226 Difference]: Without dead ends: 736 [2021-10-16 02:10:28,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:10:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-10-16 02:10:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 414. [2021-10-16 02:10:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.803874092009685) internal successors, (1571), 413 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1571 transitions. [2021-10-16 02:10:28,710 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1571 transitions. Word has length 31 [2021-10-16 02:10:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:28,711 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1571 transitions. [2021-10-16 02:10:28,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1571 transitions. [2021-10-16 02:10:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 02:10:28,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:28,713 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:28,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-10-16 02:10:28,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:29,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:29,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:29,318 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 02:10:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1641885365, now seen corresponding path program 1 times [2021-10-16 02:10:29,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:29,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106051700] [2021-10-16 02:10:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:29,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:29,320 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:29,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:10:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:30,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-16 02:10:30,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:30,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:10:30,783 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 24 treesize of output 22 [2021-10-16 02:13:40,390 WARN L207 SmtUtils]: Spent 3.14 m on a formula simplification. DAG size of input: 375 DAG size of output: 102 [2021-10-16 02:13:40,392 INFO L354 Elim1Store]: treesize reduction 2204, result has 11.5 percent of original size [2021-10-16 02:13:40,392 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 125 treesize of output 333 [2021-10-16 02:15:58,163 WARN L207 SmtUtils]: Spent 1.44 m on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2021-10-16 02:18:50,090 WARN L207 SmtUtils]: Spent 2.45 m on a formula simplification. DAG size of input: 635 DAG size of output: 108 [2021-10-16 02:18:50,091 INFO L354 Elim1Store]: treesize reduction 3614, result has 6.9 percent of original size [2021-10-16 02:18:50,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 81 case distinctions, treesize of input 291 treesize of output 400 [2021-10-16 02:18:57,566 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-16 02:18:57,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:57,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106051700] [2021-10-16 02:18:57,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/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") [2021-10-16 02:18:57,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676688441] [2021-10-16 02:18:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:57,567 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:18:57,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:18:57,572 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:18:57,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-16 02:18:57,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:18:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:59,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-16 02:18:59,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:59,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-16 02:18:59,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382866803] [2021-10-16 02:18:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:59,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:18:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:18:59,794 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:18:59,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 02:19:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:19:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-16 02:19:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:19:00,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-16 02:19:00,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:19:00,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:19:00,882 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:19:00,882 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:19:00,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:19:00,894 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 02:19:00,895 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-16 02:19:00,895 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-16 02:19:00,895 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-16 02:19:00,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:19:01,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:19:01,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:19:01,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835bbe58-1585-41df-8f8c-9210ac5cbea4/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:19:01,502 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 02:19:01,503 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:19:01,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:19:01 BasicIcfg [2021-10-16 02:19:01,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:19:01,531 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:19:01,531 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:19:01,531 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:19:01,532 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:37" (3/4) ... [2021-10-16 02:19:01,535 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:19:01,535 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:19:01,536 INFO L168 Benchmark]: Toolchain (without parser) took 566487.78 ms. Allocated memory was 60.8 MB in the beginning and 174.1 MB in the end (delta: 113.2 MB). Free memory was 40.4 MB in the beginning and 83.0 MB in the end (delta: -42.7 MB). Peak memory consumption was 71.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:01,537 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 60.8 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:19:01,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 475.02 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 39.7 MB in the end (delta: 428.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:01,538 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.95 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 37.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:01,538 INFO L168 Benchmark]: Boogie Preprocessor took 84.71 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 34.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:01,539 INFO L168 Benchmark]: RCFGBuilder took 1874.01 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 34.7 MB in the beginning and 40.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:01,539 INFO L168 Benchmark]: TraceAbstraction took 563954.34 ms. Allocated memory was 79.7 MB in the beginning and 174.1 MB in the end (delta: 94.4 MB). Free memory was 39.9 MB in the beginning and 83.0 MB in the end (delta: -43.1 MB). Peak memory consumption was 51.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:01,540 INFO L168 Benchmark]: Witness Printer took 4.56 ms. Allocated memory is still 174.1 MB. Free memory is still 83.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:19:01,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 60.8 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 475.02 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 39.7 MB in the end (delta: 428.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.95 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 37.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 84.71 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 34.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1874.01 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 34.7 MB in the beginning and 40.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 563954.34 ms. Allocated memory was 79.7 MB in the beginning and 174.1 MB in the end (delta: 94.4 MB). Free memory was 39.9 MB in the beginning and 83.0 MB in the end (delta: -43.1 MB). Peak memory consumption was 51.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.56 ms. Allocated memory is still 174.1 MB. Free memory is still 83.0 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: 27208.5ms, 214 PlacesBefore, 44 PlacesAfterwards, 223 TransitionsBefore, 38 TransitionsAfterwards, 1224 CoEnabledTransitionPairs, 7 FixpointIterations, 154 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 26 TrivialYvCompositions, 8 ConcurrentYvCompositions, 15 ChoiceCompositions, 226 TotalNumberOfCompositions, 2319 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1885, positive: 1807, positive conditional: 0, positive unconditional: 1807, negative: 78, negative conditional: 0, negative unconditional: 78, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 877, positive: 858, positive conditional: 0, positive unconditional: 858, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 877, positive: 856, positive conditional: 0, positive unconditional: 856, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 21, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 776, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 770, negative conditional: 0, negative unconditional: 770, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1885, positive: 949, positive conditional: 0, positive unconditional: 949, negative: 59, negative conditional: 0, negative unconditional: 59, unknown: 877, unknown conditional: 0, unknown unconditional: 877] , Statistics on independence cache: Total cache size (in pairs): 129, Positive cache size: 122, Positive conditional cache size: 0, Positive unconditional cache size: 122, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 127]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 int *q1, *q2, *f; [L42] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, total; [L101] 0 pthread_t t1, t2, t3, t4; [L103] 0 N = __VERIFIER_nondet_int() [L104] 0 n1 = __VERIFIER_nondet_int() [L105] 0 n2 = __VERIFIER_nondet_int() [L106] 0 q1_front = __VERIFIER_nondet_int() [L107] 0 q1_back = q1_front [L108] 0 q2_front = __VERIFIER_nondet_int() [L109] 0 q2_back = q2_front [L38] COND TRUE 0 !cond [L38] COND TRUE 0 !cond [L136] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L137] 0 int i = 0; [L137] COND TRUE 0 i < size [L138] 0 arr[i] = __VERIFIER_nondet_int() [L137] 0 i++ [L137] COND FALSE 0 !(i < size) [L140] 0 return arr; [L110] 0 q1 = create_fresh_int_array(n1) [L38] COND FALSE 0 !(!cond) [L38] COND TRUE 0 !cond [L136] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L137] 0 int i = 0; [L137] COND TRUE 0 i < size [L138] 0 arr[i] = __VERIFIER_nondet_int() [L137] 0 i++ [L140] 0 return arr; [L111] 0 q2 = create_fresh_int_array(n2) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L136] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L137] 0 int i = 0; [L137] COND TRUE 0 i < size [L138] 0 arr[i] = __VERIFIER_nondet_int() [L137] 0 i++ [L137] COND FALSE 0 !(i < size) [L140] 0 return arr; [L112] 0 f = create_fresh_int_array(N) [L38] COND TRUE 0 !cond [L117] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L48] COND TRUE 1 i < N [L38] COND TRUE 1 !cond [L51] 1 q1[q1_back] [L51] 1 f[i] [L38] COND TRUE 1 !cond [L38] COND FALSE 1 !(!cond) [L53] 1 q1_back++ [L54] 1 i++ [L118] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L62] COND TRUE 2 j < N [L38] COND FALSE 2 !(!cond) [L65] 2 f[j] [L38] COND TRUE 2 !cond [L66] 2 q2[q2_back] [L66] 2 f[j] [L38] COND FALSE 2 !(!cond) [L38] COND FALSE 2 !(!cond) [L68] 2 q2_back++ [L69] 2 j++ [L62] COND FALSE 2 !(j < N) [L73] 2 return 0; [L119] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L77] COND TRUE 3 i < N || q1_front < q1_back [L38] COND FALSE 3 !(!cond) [L80] EXPR 3 q1[q1_front] [L38] COND TRUE 3 !cond [L38] COND TRUE 3 !cond [L146] 3 return a + b; [L80] 3 total = plus(total, q1[q1_front]) [L81] 3 q1_front++ [L77] COND FALSE 3 !(i < N || q1_front < q1_back) [L85] 3 return 0; [L58] 1 return 0; [L120] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L89] COND TRUE 4 j < N || q2_front < q2_back [L38] COND TRUE 4 !cond [L92] EXPR 4 q2[q2_front] [L38] COND FALSE 4 !(!cond) [L38] COND TRUE 4 !cond [L146] 4 return a + b; [L92] 4 total = plus(total, q2[q2_front]) [L93] 4 q2_front++ [L97] 4 return 0; [L121] 0 \read(t1) [L121] FCALL, JOIN 1 pthread_join(t1, 0) [L122] 0 \read(t2) [L122] FCALL, JOIN 2 pthread_join(t2, 0) [L123] 0 \read(t3) [L123] FCALL, JOIN 3 pthread_join(t3, 0) [L124] 0 \read(t4) [L124] FCALL, JOIN 4 pthread_join(t4, 0) [L38] COND FALSE 0 !(!cond) [L127] 0 reach_error() - UnprovableResult [Line: 120]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 118]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 117]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 119]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 226 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 563748.9ms, OverallIterations: 13, TraceHistogramMax: 1, EmptinessCheckTime: 45.7ms, AutomataDifference: 3597.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27285.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 432 SDtfs, 1054 SDslu, 1343 SDs, 0 SdLazy, 681 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2560.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1043 GetRequests, 945 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1849.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=712occurred in iteration=5, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 368.6ms AutomataMinimizationTime, 12 MinimizatonAttempts, 2468 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 450.1ms SsaConstructionTime, 2269.8ms SatisfiabilityAnalysisTime, 8655.7ms InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1028 ConstructedInterpolants, 23 QuantifiedInterpolants, 5145 SizeOfPredicates, 102 NumberOfNonLiveVariables, 3203 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 38 InterpolantComputations, 15 PerfectInterpolantSequences, 93/118 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...