./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:53:10,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:53:10,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:53:10,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:53:10,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:53:10,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:53:10,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:53:10,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:53:10,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:53:10,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:53:10,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:53:10,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:53:10,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:53:10,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:53:10,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:53:10,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:53:10,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:53:10,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:53:10,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:53:10,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:53:10,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:53:10,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:53:10,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:53:10,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:53:10,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:53:10,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:53:10,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:53:10,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:53:10,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:53:10,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:53:10,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:53:10,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:53:10,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:53:10,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:53:10,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:53:10,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:53:10,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:53:10,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:53:10,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:53:10,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:53:10,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:53:10,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:53:10,130 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:53:10,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:53:10,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:53:10,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:53:10,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:53:10,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:53:10,132 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:53:10,132 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:53:10,132 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:53:10,132 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:53:10,133 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:53:10,133 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:53:10,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:53:10,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:53:10,134 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:53:10,134 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:53:10,134 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:53:10,134 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:53:10,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:53:10,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:53:10,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:53:10,136 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:53:10,136 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:53:10,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:53:10,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:53:10,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:53:10,137 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:53:10,137 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:53:10,138 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:53:10,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:53:10,138 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:53:10,138 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:53:10,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:53:10,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:53:10,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:53:10,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:53:10,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:53:10,140 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:53:10,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:53:10,140 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:53:10,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:53:10,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:53:10,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-25 23:53:10,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:53:10,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:53:10,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:53:10,416 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:53:10,417 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:53:10,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-25 23:53:13,543 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:53:13,854 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:53:13,854 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-25 23:53:13,862 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data/922676412/1c0a42e9ecc14c4eb5aecf751fb9e45f/FLAG796ca65d4 [2022-11-25 23:53:13,882 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data/922676412/1c0a42e9ecc14c4eb5aecf751fb9e45f [2022-11-25 23:53:13,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:53:13,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:53:13,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:53:13,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:53:13,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:53:13,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:53:13" (1/1) ... [2022-11-25 23:53:13,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300c5b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:13, skipping insertion in model container [2022-11-25 23:53:13,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:53:13" (1/1) ... [2022-11-25 23:53:13,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:53:13,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:53:14,183 WARN L237 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_f3375046-02e6-41da-94e7-960797cb0de0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-25 23:53:14,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:53:14,208 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 23:53:14,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12eeab08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:14, skipping insertion in model container [2022-11-25 23:53:14,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:53:14,210 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 23:53:14,211 INFO L158 Benchmark]: Toolchain (without parser) took 323.88ms. Allocated memory is still 199.2MB. Free memory was 166.3MB in the beginning and 155.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:53:14,212 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 151.0MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:53:14,213 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.92ms. Allocated memory is still 199.2MB. Free memory was 166.3MB in the beginning and 155.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:53:14,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 151.0MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 315.92ms. Allocated memory is still 199.2MB. Free memory was 166.3MB in the beginning and 155.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:53:16,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:53:16,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:53:16,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:53:16,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:53:16,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:53:16,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:53:16,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:53:16,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:53:16,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:53:16,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:53:16,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:53:16,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:53:16,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:53:16,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:53:16,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:53:16,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:53:16,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:53:16,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:53:16,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:53:16,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:53:16,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:53:16,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:53:16,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:53:16,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:53:16,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:53:16,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:53:16,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:53:16,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:53:16,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:53:16,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:53:16,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:53:16,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:53:16,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:53:16,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:53:16,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:53:16,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:53:16,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:53:16,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:53:16,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:53:16,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:53:16,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 23:53:16,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:53:16,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:53:16,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:53:16,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:53:16,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:53:16,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:53:16,723 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:53:16,723 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:53:16,723 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:53:16,723 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:53:16,724 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:53:16,725 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:53:16,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:53:16,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:53:16,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:53:16,726 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:53:16,726 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:53:16,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:53:16,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:53:16,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:53:16,727 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:53:16,727 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:53:16,727 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:53:16,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:53:16,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:53:16,728 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:53:16,728 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:53:16,729 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:53:16,729 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:53:16,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:53:16,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:53:16,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:53:16,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:53:16,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:53:16,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:53:16,730 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:53:16,731 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:53:16,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:53:16,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:53:16,731 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_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-25 23:53:17,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:53:17,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:53:17,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:53:17,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:53:17,125 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:53:17,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-25 23:53:20,214 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:53:20,477 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:53:20,478 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-25 23:53:20,485 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data/3259c7b27/3191f5329f7d405880dc8057957217a5/FLAG99e846209 [2022-11-25 23:53:20,504 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/data/3259c7b27/3191f5329f7d405880dc8057957217a5 [2022-11-25 23:53:20,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:53:20,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:53:20,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:53:20,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:53:20,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:53:20,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b86e54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20, skipping insertion in model container [2022-11-25 23:53:20,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:53:20,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:53:20,719 WARN L237 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_f3375046-02e6-41da-94e7-960797cb0de0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-25 23:53:20,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:53:20,743 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 23:53:20,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:53:20,763 WARN L237 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_f3375046-02e6-41da-94e7-960797cb0de0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-25 23:53:20,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:53:20,786 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:53:20,821 WARN L237 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_f3375046-02e6-41da-94e7-960797cb0de0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-25 23:53:20,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:53:20,862 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:53:20,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20 WrapperNode [2022-11-25 23:53:20,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:53:20,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:53:20,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:53:20,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:53:20,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,942 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 122 [2022-11-25 23:53:20,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:53:20,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:53:20,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:53:20,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:53:20,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:20,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:21,002 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:21,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:21,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:53:21,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:53:21,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:53:21,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:53:21,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (1/1) ... [2022-11-25 23:53:21,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:53:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:21,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:53:21,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:53:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:53:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:53:21,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:53:21,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 23:53:21,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:53:21,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:53:21,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:53:21,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:53:21,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:53:21,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:53:21,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:53:21,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:53:21,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 23:53:21,107 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:53:21,265 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:53:21,267 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:53:21,906 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:53:21,916 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:53:21,916 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 23:53:21,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:53:21 BoogieIcfgContainer [2022-11-25 23:53:21,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:53:21,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:53:21,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:53:21,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:53:21,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:53:20" (1/3) ... [2022-11-25 23:53:21,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ec1ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:53:21, skipping insertion in model container [2022-11-25 23:53:21,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:53:20" (2/3) ... [2022-11-25 23:53:21,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ec1ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:53:21, skipping insertion in model container [2022-11-25 23:53:21,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:53:21" (3/3) ... [2022-11-25 23:53:21,940 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-25 23:53:21,958 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:53:21,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-25 23:53:21,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:53:22,112 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 23:53:22,160 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:53:22,176 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 252 transitions, 520 flow [2022-11-25 23:53:22,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 252 transitions, 520 flow [2022-11-25 23:53:22,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 252 transitions, 520 flow [2022-11-25 23:53:22,330 INFO L130 PetriNetUnfolder]: 21/250 cut-off events. [2022-11-25 23:53:22,330 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 23:53:22,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 21/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 396 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 164. Up to 3 conditions per place. [2022-11-25 23:53:22,355 INFO L119 LiptonReduction]: Number of co-enabled transitions 4636 [2022-11-25 23:53:54,142 INFO L134 LiptonReduction]: Checked pairs total: 7943 [2022-11-25 23:53:54,142 INFO L136 LiptonReduction]: Total number of compositions: 295 [2022-11-25 23:53:54,151 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 57 transitions, 130 flow [2022-11-25 23:53:54,205 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 729 states, 443 states have (on average 4.6613995485327315) internal successors, (2065), 728 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:54,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:53:54,230 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6bcc3f08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:53:54,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-11-25 23:53:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 443 states have (on average 4.6613995485327315) internal successors, (2065), 728 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:54,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:53:54,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:54,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:53:54,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:53:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash 31611, now seen corresponding path program 1 times [2022-11-25 23:53:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:54,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091483354] [2022-11-25 23:53:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:54,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:54,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:53:54,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 23:53:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:53:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:54,541 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 23:53:54,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 23:53:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:54,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:53:54,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091483354] [2022-11-25 23:53:54,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091483354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:53:54,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:53:54,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:53:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613496795] [2022-11-25 23:53:54,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:53:54,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:53:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:53:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:53:54,641 INFO L87 Difference]: Start difference. First operand has 729 states, 443 states have (on average 4.6613995485327315) internal successors, (2065), 728 states have internal predecessors, (2065), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:54,982 INFO L93 Difference]: Finished difference Result 486 states and 1382 transitions. [2022-11-25 23:53:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:53:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-25 23:53:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:55,001 INFO L225 Difference]: With dead ends: 486 [2022-11-25 23:53:55,001 INFO L226 Difference]: Without dead ends: 486 [2022-11-25 23:53:55,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:53:55,006 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:55,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:53:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-25 23:53:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2022-11-25 23:53:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 319 states have (on average 4.332288401253918) internal successors, (1382), 485 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1382 transitions. [2022-11-25 23:53:55,081 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1382 transitions. Word has length 2 [2022-11-25 23:53:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:55,081 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 1382 transitions. [2022-11-25 23:53:55,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1382 transitions. [2022-11-25 23:53:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:53:55,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:55,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:53:55,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:55,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:55,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:53:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:55,295 INFO L85 PathProgramCache]: Analyzing trace with hash 31612, now seen corresponding path program 1 times [2022-11-25 23:53:55,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:55,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619105289] [2022-11-25 23:53:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:55,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:55,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:55,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:53:55,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 23:53:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:53:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:55,483 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:53:55,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:53:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:55,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:53:55,509 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619105289] [2022-11-25 23:53:55,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619105289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:53:55,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:53:55,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:53:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390200830] [2022-11-25 23:53:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:53:55,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:53:55,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:53:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:53:55,512 INFO L87 Difference]: Start difference. First operand 486 states and 1382 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:56,104 INFO L93 Difference]: Finished difference Result 969 states and 2761 transitions. [2022-11-25 23:53:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:53:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-25 23:53:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:56,113 INFO L225 Difference]: With dead ends: 969 [2022-11-25 23:53:56,113 INFO L226 Difference]: Without dead ends: 969 [2022-11-25 23:53:56,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:53:56,115 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:56,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:53:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-11-25 23:53:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 488. [2022-11-25 23:53:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 321 states have (on average 4.32398753894081) internal successors, (1388), 487 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1388 transitions. [2022-11-25 23:53:56,180 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1388 transitions. Word has length 2 [2022-11-25 23:53:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:56,180 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 1388 transitions. [2022-11-25 23:53:56,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1388 transitions. [2022-11-25 23:53:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:53:56,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:56,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:53:56,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:56,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:53:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:56,396 INFO L85 PathProgramCache]: Analyzing trace with hash 987621, now seen corresponding path program 1 times [2022-11-25 23:53:56,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:56,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723316350] [2022-11-25 23:53:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:56,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:56,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:56,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:53:56,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 23:53:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:56,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:53:56,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:56,550 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:53:56,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:53:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:56,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:56,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:56,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723316350] [2022-11-25 23:53:56,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723316350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:56,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1341704227] [2022-11-25 23:53:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:56,878 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:53:56,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:53:56,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:53:56,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-25 23:53:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:57,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:53:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:57,101 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:53:57,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:53:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:57,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:57,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1341704227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:57,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137561040] [2022-11-25 23:53:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:57,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:57,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:57,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:57,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:53:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:57,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:53:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:57,409 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:53:57,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:53:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:57,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:57,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137561040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:57,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:53:57,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-25 23:53:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196912566] [2022-11-25 23:53:57,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:57,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:53:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:53:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:53:57,644 INFO L87 Difference]: Start difference. First operand 488 states and 1388 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:00,210 INFO L93 Difference]: Finished difference Result 1937 states and 5525 transitions. [2022-11-25 23:54:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:54:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 3 [2022-11-25 23:54:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:00,224 INFO L225 Difference]: With dead ends: 1937 [2022-11-25 23:54:00,224 INFO L226 Difference]: Without dead ends: 1937 [2022-11-25 23:54:00,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:54:00,226 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 325 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:00,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 0 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 23:54:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-11-25 23:54:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 494. [2022-11-25 23:54:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 327 states have (on average 4.299694189602446) internal successors, (1406), 493 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1406 transitions. [2022-11-25 23:54:00,260 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1406 transitions. Word has length 3 [2022-11-25 23:54:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:00,261 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 1406 transitions. [2022-11-25 23:54:00,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1406 transitions. [2022-11-25 23:54:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:54:00,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:00,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:54:00,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:00,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:00,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:00,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:00,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash 988926, now seen corresponding path program 1 times [2022-11-25 23:54:00,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:00,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236432452] [2022-11-25 23:54:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:00,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:00,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:00,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:00,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 23:54:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:54:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:01,023 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:54:01,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 23:54:01,044 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-25 23:54:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:01,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 23:54:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:01,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:01,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236432452] [2022-11-25 23:54:01,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236432452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:01,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:01,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:54:01,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128176383] [2022-11-25 23:54:01,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:01,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:54:01,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:54:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:54:01,164 INFO L87 Difference]: Start difference. First operand 494 states and 1406 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:01,480 INFO L93 Difference]: Finished difference Result 395 states and 1079 transitions. [2022-11-25 23:54:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-25 23:54:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:01,483 INFO L225 Difference]: With dead ends: 395 [2022-11-25 23:54:01,483 INFO L226 Difference]: Without dead ends: 395 [2022-11-25 23:54:01,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:54:01,484 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:01,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:54:01,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-25 23:54:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-11-25 23:54:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 274 states have (on average 3.937956204379562) internal successors, (1079), 394 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1079 transitions. [2022-11-25 23:54:01,499 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1079 transitions. Word has length 3 [2022-11-25 23:54:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:01,499 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 1079 transitions. [2022-11-25 23:54:01,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1079 transitions. [2022-11-25 23:54:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:54:01,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:01,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:54:01,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:01,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:01,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash 988927, now seen corresponding path program 1 times [2022-11-25 23:54:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:01,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60993990] [2022-11-25 23:54:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:01,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:01,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:01,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 23:54:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:01,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:54:01,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:01,856 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 23:54:01,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 23:54:01,916 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:54:01,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:54:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:01,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:01,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60993990] [2022-11-25 23:54:01,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60993990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:01,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:01,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:54:01,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647044260] [2022-11-25 23:54:01,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:01,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:54:01,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:54:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:54:01,951 INFO L87 Difference]: Start difference. First operand 395 states and 1079 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:02,273 INFO L93 Difference]: Finished difference Result 296 states and 752 transitions. [2022-11-25 23:54:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-25 23:54:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:02,275 INFO L225 Difference]: With dead ends: 296 [2022-11-25 23:54:02,275 INFO L226 Difference]: Without dead ends: 296 [2022-11-25 23:54:02,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:54:02,276 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:02,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:54:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-25 23:54:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-11-25 23:54:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 221 states have (on average 3.4027149321266967) internal successors, (752), 295 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 752 transitions. [2022-11-25 23:54:02,286 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 752 transitions. Word has length 3 [2022-11-25 23:54:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:02,287 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 752 transitions. [2022-11-25 23:54:02,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 752 transitions. [2022-11-25 23:54:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:54:02,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:02,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:54:02,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:02,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:02,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:02,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash 950381445, now seen corresponding path program 1 times [2022-11-25 23:54:02,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:02,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66376041] [2022-11-25 23:54:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:02,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:02,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:02,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 23:54:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:02,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:54:02,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:02,633 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 23:54:02,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-25 23:54:02,673 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:54:02,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:54:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:02,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:02,688 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66376041] [2022-11-25 23:54:02,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66376041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:02,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:02,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:54:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639843303] [2022-11-25 23:54:02,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:02,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:54:02,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:54:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:54:02,690 INFO L87 Difference]: Start difference. First operand 296 states and 752 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:02,943 INFO L93 Difference]: Finished difference Result 275 states and 707 transitions. [2022-11-25 23:54:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-25 23:54:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:02,946 INFO L225 Difference]: With dead ends: 275 [2022-11-25 23:54:02,946 INFO L226 Difference]: Without dead ends: 275 [2022-11-25 23:54:02,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:54:02,947 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:02,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:54:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-25 23:54:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-11-25 23:54:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 214 states have (on average 3.303738317757009) internal successors, (707), 274 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 707 transitions. [2022-11-25 23:54:02,959 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 707 transitions. Word has length 5 [2022-11-25 23:54:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:02,960 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 707 transitions. [2022-11-25 23:54:02,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 707 transitions. [2022-11-25 23:54:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:54:02,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:02,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:54:02,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:03,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:03,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash 950381446, now seen corresponding path program 1 times [2022-11-25 23:54:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415009993] [2022-11-25 23:54:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:03,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:03,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:03,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:03,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 23:54:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:54:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:03,332 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-25 23:54:03,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-25 23:54:03,347 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 24 [2022-11-25 23:54:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:03,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 23:54:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:03,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:03,463 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:03,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415009993] [2022-11-25 23:54:03,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415009993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:03,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:03,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:54:03,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189905265] [2022-11-25 23:54:03,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:03,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:54:03,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:54:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:54:03,465 INFO L87 Difference]: Start difference. First operand 275 states and 707 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:03,825 INFO L93 Difference]: Finished difference Result 254 states and 662 transitions. [2022-11-25 23:54:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:03,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-25 23:54:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:03,827 INFO L225 Difference]: With dead ends: 254 [2022-11-25 23:54:03,828 INFO L226 Difference]: Without dead ends: 254 [2022-11-25 23:54:03,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:54:03,829 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:03,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:54:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-25 23:54:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-11-25 23:54:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 207 states have (on average 3.1980676328502415) internal successors, (662), 253 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 662 transitions. [2022-11-25 23:54:03,838 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 662 transitions. Word has length 5 [2022-11-25 23:54:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:03,838 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 662 transitions. [2022-11-25 23:54:03,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 662 transitions. [2022-11-25 23:54:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:54:03,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:03,839 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-25 23:54:03,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:04,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:04,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash -634958404, now seen corresponding path program 2 times [2022-11-25 23:54:04,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682047711] [2022-11-25 23:54:04,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:54:04,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:04,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:04,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:04,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 23:54:04,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:54:04,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:04,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:54:04,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:04,226 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:54:04,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:54:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:04,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:05,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:05,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682047711] [2022-11-25 23:54:05,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682047711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:05,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109460568] [2022-11-25 23:54:05,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:54:05,271 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:05,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:05,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:05,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-25 23:54:05,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:54:05,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:54:05,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:05,507 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:54:05,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:54:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:05,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:05,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1109460568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012463366] [2022-11-25 23:54:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:54:05,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:05,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:05,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:54:05,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:54:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:05,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:54:05,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:06,009 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:54:06,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:54:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:06,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:06,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012463366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:06,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:06,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-25 23:54:06,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311142755] [2022-11-25 23:54:06,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:06,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:54:06,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:06,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:54:06,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:54:06,289 INFO L87 Difference]: Start difference. First operand 254 states and 662 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:10,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:11,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:12,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:14,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:16,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:21,404 INFO L93 Difference]: Finished difference Result 2194 states and 5797 transitions. [2022-11-25 23:54:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:54:21,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 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 6 [2022-11-25 23:54:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:21,418 INFO L225 Difference]: With dead ends: 2194 [2022-11-25 23:54:21,419 INFO L226 Difference]: Without dead ends: 2194 [2022-11-25 23:54:21,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:54:21,421 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 858 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 82 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:21,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 0 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1130 Invalid, 2 Unknown, 0 Unchecked, 13.6s Time] [2022-11-25 23:54:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2022-11-25 23:54:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 265. [2022-11-25 23:54:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 218 states have (on average 3.1422018348623855) internal successors, (685), 264 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 685 transitions. [2022-11-25 23:54:21,450 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 685 transitions. Word has length 6 [2022-11-25 23:54:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:21,450 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 685 transitions. [2022-11-25 23:54:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 685 transitions. [2022-11-25 23:54:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:54:21,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:21,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:54:21,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:21,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:21,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:22,071 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -602946855, now seen corresponding path program 1 times [2022-11-25 23:54:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529939031] [2022-11-25 23:54:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:22,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:22,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:22,073 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:22,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 23:54:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:54:22,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:22,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:54:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:22,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:22,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529939031] [2022-11-25 23:54:22,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529939031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:22,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:22,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:54:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871811538] [2022-11-25 23:54:22,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:22,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:54:22,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:54:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:54:22,262 INFO L87 Difference]: Start difference. First operand 265 states and 685 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:22,746 INFO L93 Difference]: Finished difference Result 473 states and 1225 transitions. [2022-11-25 23:54:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:54:22,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-25 23:54:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:22,750 INFO L225 Difference]: With dead ends: 473 [2022-11-25 23:54:22,750 INFO L226 Difference]: Without dead ends: 473 [2022-11-25 23:54:22,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:54:22,752 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:22,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:54:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-25 23:54:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 281. [2022-11-25 23:54:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 234 states have (on average 3.376068376068376) internal successors, (790), 280 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 790 transitions. [2022-11-25 23:54:22,763 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 790 transitions. Word has length 6 [2022-11-25 23:54:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:22,765 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 790 transitions. [2022-11-25 23:54:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 790 transitions. [2022-11-25 23:54:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:54:22,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:22,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:54:22,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:22,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:22,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash -602947009, now seen corresponding path program 1 times [2022-11-25 23:54:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:22,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234594708] [2022-11-25 23:54:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:22,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:22,979 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:22,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 23:54:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:54:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:23,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:23,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:23,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234594708] [2022-11-25 23:54:23,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234594708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:23,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:23,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:54:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108340562] [2022-11-25 23:54:23,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:23,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:54:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:54:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:54:23,138 INFO L87 Difference]: Start difference. First operand 281 states and 790 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:23,681 INFO L93 Difference]: Finished difference Result 389 states and 1025 transitions. [2022-11-25 23:54:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:54:23,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-25 23:54:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:23,684 INFO L225 Difference]: With dead ends: 389 [2022-11-25 23:54:23,684 INFO L226 Difference]: Without dead ends: 389 [2022-11-25 23:54:23,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:54:23,685 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:23,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:54:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-25 23:54:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 324. [2022-11-25 23:54:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 277 states have (on average 3.288808664259928) internal successors, (911), 323 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 911 transitions. [2022-11-25 23:54:23,708 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 911 transitions. Word has length 6 [2022-11-25 23:54:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:23,709 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 911 transitions. [2022-11-25 23:54:23,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 911 transitions. [2022-11-25 23:54:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:54:23,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:23,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:23,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:23,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:23,923 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1823145000, now seen corresponding path program 1 times [2022-11-25 23:54:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:23,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843731367] [2022-11-25 23:54:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:23,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:23,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:23,926 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:23,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 23:54:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:54:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:54:24,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:24,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:24,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843731367] [2022-11-25 23:54:24,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843731367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:24,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:24,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:54:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737651072] [2022-11-25 23:54:24,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:54:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:54:24,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:54:24,075 INFO L87 Difference]: Start difference. First operand 324 states and 911 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:24,628 INFO L93 Difference]: Finished difference Result 454 states and 1223 transitions. [2022-11-25 23:54:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:54:24,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-25 23:54:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:24,631 INFO L225 Difference]: With dead ends: 454 [2022-11-25 23:54:24,631 INFO L226 Difference]: Without dead ends: 454 [2022-11-25 23:54:24,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:54:24,632 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:24,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:54:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-25 23:54:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 324. [2022-11-25 23:54:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 277 states have (on average 3.288808664259928) internal successors, (911), 323 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 911 transitions. [2022-11-25 23:54:24,643 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 911 transitions. Word has length 7 [2022-11-25 23:54:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:24,643 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 911 transitions. [2022-11-25 23:54:24,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 911 transitions. [2022-11-25 23:54:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:54:24,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:24,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:24,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:24,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash 648877514, now seen corresponding path program 1 times [2022-11-25 23:54:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:24,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442703652] [2022-11-25 23:54:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:24,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:24,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:24,858 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:24,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 23:54:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:54:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:25,041 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 23:54:25,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 23:54:25,077 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:54:25,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:54:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:25,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:25,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442703652] [2022-11-25 23:54:25,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442703652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:25,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:25,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:54:25,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949100476] [2022-11-25 23:54:25,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:25,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:54:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:54:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:54:25,096 INFO L87 Difference]: Start difference. First operand 324 states and 911 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:25,355 INFO L93 Difference]: Finished difference Result 260 states and 722 transitions. [2022-11-25 23:54:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:54:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-25 23:54:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:25,358 INFO L225 Difference]: With dead ends: 260 [2022-11-25 23:54:25,358 INFO L226 Difference]: Without dead ends: 260 [2022-11-25 23:54:25,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:54:25,359 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:25,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:54:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-25 23:54:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-11-25 23:54:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 230 states have (on average 3.139130434782609) internal successors, (722), 259 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 722 transitions. [2022-11-25 23:54:25,375 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 722 transitions. Word has length 8 [2022-11-25 23:54:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:25,376 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 722 transitions. [2022-11-25 23:54:25,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 722 transitions. [2022-11-25 23:54:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:54:25,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:25,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:25,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:25,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:25,590 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:54:25,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 648877515, now seen corresponding path program 1 times [2022-11-25 23:54:25,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:25,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098711259] [2022-11-25 23:54:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:25,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:25,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:25,592 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:25,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 23:54:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:54:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:25,821 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:54:25,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:54:25,922 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 23:54:25,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:54:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:26,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:27,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:27,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098711259] [2022-11-25 23:54:27,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098711259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:27,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [746212513] [2022-11-25 23:54:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:27,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:27,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:27,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-25 23:54:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:54:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:27,552 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:54:27,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:54:27,621 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 23:54:27,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 23:54:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:27,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:54:27,845 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:54:27,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:54:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:54:27,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:54:28,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [746212513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:28,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986831917] [2022-11-25 23:54:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:28,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:28,688 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:28,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:54:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:54:28,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:28,861 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:54:28,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:54:29,063 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 23:54:29,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:54:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:29,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986831917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:29,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4, 4, 6, 6] total 20 [2022-11-25 23:54:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729820702] [2022-11-25 23:54:29,804 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:54:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:54:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:54:29,805 INFO L87 Difference]: Start difference. First operand 260 states and 722 transitions. Second operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2022-11-25 23:54:44,526 WARN L233 SmtUtils]: Spent 14.12s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:54:51,408 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:54:59,485 WARN L233 SmtUtils]: Spent 7.20s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:55:16,196 WARN L233 SmtUtils]: Spent 16.36s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:55:37,737 WARN L233 SmtUtils]: Spent 21.13s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:55:45,962 WARN L233 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:01,418 WARN L233 SmtUtils]: Spent 11.46s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:10,801 WARN L233 SmtUtils]: Spent 7.39s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:23,142 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:36,584 WARN L233 SmtUtils]: Spent 10.93s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:49,531 WARN L233 SmtUtils]: Spent 12.28s on a formula simplification. DAG size of input: 62 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:56,500 INFO L93 Difference]: Finished difference Result 2605 states and 6827 transitions. [2022-11-25 23:56:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 23:56:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 8 [2022-11-25 23:56:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:56,513 INFO L225 Difference]: With dead ends: 2605 [2022-11-25 23:56:56,513 INFO L226 Difference]: Without dead ends: 2605 [2022-11-25 23:56:56,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 142.4s TimeCoverageRelationStatistics Valid=625, Invalid=2345, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 23:56:56,515 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1265 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:56,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 0 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-25 23:56:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-11-25 23:56:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 285. [2022-11-25 23:56:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 259 states have (on average 3.1776061776061777) internal successors, (823), 284 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 823 transitions. [2022-11-25 23:56:56,552 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 823 transitions. Word has length 8 [2022-11-25 23:56:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:56,552 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 823 transitions. [2022-11-25 23:56:56,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2022-11-25 23:56:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 823 transitions. [2022-11-25 23:56:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:56:56,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:56,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:56,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:56,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:56,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:57,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:57,161 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:56:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash 648877667, now seen corresponding path program 1 times [2022-11-25 23:56:57,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:57,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863467685] [2022-11-25 23:56:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:57,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:57,164 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:57,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 23:56:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:57,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:56:57,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:57,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:56:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:56:57,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:57,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863467685] [2022-11-25 23:56:57,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863467685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:57,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:57,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:56:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405328225] [2022-11-25 23:56:57,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:57,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:56:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:56:57,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:56:57,327 INFO L87 Difference]: Start difference. First operand 285 states and 823 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:57,554 INFO L93 Difference]: Finished difference Result 227 states and 635 transitions. [2022-11-25 23:56:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:56:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-25 23:56:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:57,556 INFO L225 Difference]: With dead ends: 227 [2022-11-25 23:56:57,557 INFO L226 Difference]: Without dead ends: 227 [2022-11-25 23:56:57,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:56:57,557 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:57,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:56:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-25 23:56:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-25 23:56:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 213 states have (on average 2.9812206572769955) internal successors, (635), 226 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 635 transitions. [2022-11-25 23:56:57,564 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 635 transitions. Word has length 8 [2022-11-25 23:56:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:57,564 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 635 transitions. [2022-11-25 23:56:57,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 635 transitions. [2022-11-25 23:56:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:56:57,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:57,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:57,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:57,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:57,778 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:56:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 389851498, now seen corresponding path program 1 times [2022-11-25 23:56:57,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:57,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462788436] [2022-11-25 23:56:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:57,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:57,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:57,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:57,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 23:56:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:56:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:57,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:57,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462788436] [2022-11-25 23:56:57,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462788436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:57,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:57,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:56:57,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040184641] [2022-11-25 23:56:57,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:57,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:56:57,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:56:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:56:57,981 INFO L87 Difference]: Start difference. First operand 227 states and 635 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:58,413 INFO L93 Difference]: Finished difference Result 271 states and 720 transitions. [2022-11-25 23:56:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:56:58,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-25 23:56:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:58,414 INFO L225 Difference]: With dead ends: 271 [2022-11-25 23:56:58,414 INFO L226 Difference]: Without dead ends: 271 [2022-11-25 23:56:58,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:56:58,415 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:58,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 4 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:56:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-25 23:56:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 250. [2022-11-25 23:56:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 236 states have (on average 2.940677966101695) internal successors, (694), 249 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 694 transitions. [2022-11-25 23:56:58,423 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 694 transitions. Word has length 8 [2022-11-25 23:56:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:58,423 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 694 transitions. [2022-11-25 23:56:58,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 694 transitions. [2022-11-25 23:56:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:56:58,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:58,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:58,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-25 23:56:58,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:58,636 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:56:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash -302969581, now seen corresponding path program 1 times [2022-11-25 23:56:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:58,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597657507] [2022-11-25 23:56:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:58,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:58,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:58,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:58,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 23:56:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:58,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:56:58,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:56:58,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:58,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597657507] [2022-11-25 23:56:58,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597657507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:58,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:58,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:56:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696717114] [2022-11-25 23:56:58,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:58,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:56:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:56:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:56:58,846 INFO L87 Difference]: Start difference. First operand 250 states and 694 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:59,300 INFO L93 Difference]: Finished difference Result 295 states and 771 transitions. [2022-11-25 23:56:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:56:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-25 23:56:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:59,302 INFO L225 Difference]: With dead ends: 295 [2022-11-25 23:56:59,303 INFO L226 Difference]: Without dead ends: 295 [2022-11-25 23:56:59,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:56:59,303 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:59,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:56:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-25 23:56:59,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 229. [2022-11-25 23:56:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 215 states have (on average 2.916279069767442) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2022-11-25 23:56:59,310 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 9 [2022-11-25 23:56:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:59,311 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2022-11-25 23:56:59,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2022-11-25 23:56:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:56:59,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:59,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:59,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:59,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:59,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:56:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash 802375221, now seen corresponding path program 1 times [2022-11-25 23:56:59,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:59,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719484921] [2022-11-25 23:56:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:59,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:59,527 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:59,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 23:56:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:59,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:56:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:59,807 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:56:59,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:56:59,883 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 23:56:59,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 23:57:00,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:00,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:57:00,041 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:57:00,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:57:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:57:00,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:57:02,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:57:02,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719484921] [2022-11-25 23:57:02,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719484921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:02,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707122151] [2022-11-25 23:57:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:02,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:57:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:57:02,837 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:57:02,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-25 23:57:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:03,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:57:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:03,176 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:57:03,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:57:03,253 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 23:57:03,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 23:57:03,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:03,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:57:03,420 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:57:03,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:57:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:57:03,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:57:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707122151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326780651] [2022-11-25 23:57:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:03,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:03,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:03,779 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:03,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 23:57:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:03,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:57:03,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:03,984 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:57:03,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:57:04,150 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 23:57:04,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:57:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:04,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:09,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326780651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:09,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:57:09,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 6, 6] total 18 [2022-11-25 23:57:09,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336457207] [2022-11-25 23:57:09,567 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:09,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:57:09,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:57:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:57:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=307, Unknown=2, NotChecked=0, Total=380 [2022-11-25 23:57:09,568 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-11-25 23:57:28,589 WARN L233 SmtUtils]: Spent 18.61s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:37,890 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:53,940 WARN L233 SmtUtils]: Spent 15.31s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:16,629 WARN L233 SmtUtils]: Spent 22.38s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:34,328 WARN L233 SmtUtils]: Spent 17.37s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:42,599 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:59,805 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:59:05,311 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:59:12,728 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:59:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:20,645 INFO L93 Difference]: Finished difference Result 1861 states and 5022 transitions. [2022-11-25 23:59:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 23:59:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 10 [2022-11-25 23:59:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:20,656 INFO L225 Difference]: With dead ends: 1861 [2022-11-25 23:59:20,656 INFO L226 Difference]: Without dead ends: 1861 [2022-11-25 23:59:20,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 134.4s TimeCoverageRelationStatistics Valid=450, Invalid=1528, Unknown=2, NotChecked=0, Total=1980 [2022-11-25 23:59:20,657 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1232 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:20,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 0 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-25 23:59:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-25 23:59:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 285. [2022-11-25 23:59:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 271 states have (on average 3.059040590405904) internal successors, (829), 284 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 829 transitions. [2022-11-25 23:59:20,689 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 829 transitions. Word has length 10 [2022-11-25 23:59:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:20,690 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 829 transitions. [2022-11-25 23:59:20,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-11-25 23:59:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 829 transitions. [2022-11-25 23:59:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:59:20,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:20,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:20,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-25 23:59:20,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:21,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:21,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:59:21,305 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:59:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash 802375184, now seen corresponding path program 1 times [2022-11-25 23:59:21,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:59:21,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774137302] [2022-11-25 23:59:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:21,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:59:21,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:59:21,307 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:59:21,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 23:59:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:59:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:21,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:21,775 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 21 [2022-11-25 23:59:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:21,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:59:21,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774137302] [2022-11-25 23:59:21,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774137302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:21,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695755617] [2022-11-25 23:59:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:21,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:59:21,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:59:21,875 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:59:21,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-25 23:59:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:59:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:22,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:59:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:22,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:22,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [695755617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419992128] [2022-11-25 23:59:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:22,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:22,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:22,735 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:22,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 23:59:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:59:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:22,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:59:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:22,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:23,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419992128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:23,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:59:23,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-25 23:59:23,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191482081] [2022-11-25 23:59:23,126 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:23,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:59:23,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:59:23,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:59:23,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:59:23,127 INFO L87 Difference]: Start difference. First operand 285 states and 829 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:26,519 INFO L93 Difference]: Finished difference Result 1028 states and 2931 transitions. [2022-11-25 23:59:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:59:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 10 [2022-11-25 23:59:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:26,525 INFO L225 Difference]: With dead ends: 1028 [2022-11-25 23:59:26,525 INFO L226 Difference]: Without dead ends: 1028 [2022-11-25 23:59:26,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:59:26,526 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 459 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:26,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 0 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 23:59:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-11-25 23:59:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 307. [2022-11-25 23:59:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 293 states have (on average 3.1160409556313993) internal successors, (913), 306 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 913 transitions. [2022-11-25 23:59:26,549 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 913 transitions. Word has length 10 [2022-11-25 23:59:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:26,549 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 913 transitions. [2022-11-25 23:59:26,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:26,550 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 913 transitions. [2022-11-25 23:59:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:59:26,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:26,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:26,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-25 23:59:26,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:26,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:27,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:59:27,163 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:59:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash 801059195, now seen corresponding path program 1 times [2022-11-25 23:59:27,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:59:27,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551469234] [2022-11-25 23:59:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:59:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:59:27,165 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:59:27,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-25 23:59:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:59:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:59:27,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:59:27,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:59:27,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551469234] [2022-11-25 23:59:27,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551469234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:59:27,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:59:27,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:59:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561513629] [2022-11-25 23:59:27,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:59:27,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:59:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:59:27,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:59:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:59:27,363 INFO L87 Difference]: Start difference. First operand 307 states and 913 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:28,004 INFO L93 Difference]: Finished difference Result 499 states and 1421 transitions. [2022-11-25 23:59:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:59:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-25 23:59:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:28,008 INFO L225 Difference]: With dead ends: 499 [2022-11-25 23:59:28,008 INFO L226 Difference]: Without dead ends: 499 [2022-11-25 23:59:28,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:59:28,009 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:28,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:59:28,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-25 23:59:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 347. [2022-11-25 23:59:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 333 states have (on average 3.15015015015015) internal successors, (1049), 346 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1049 transitions. [2022-11-25 23:59:28,018 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1049 transitions. Word has length 10 [2022-11-25 23:59:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:28,019 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 1049 transitions. [2022-11-25 23:59:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1049 transitions. [2022-11-25 23:59:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:59:28,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:28,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:28,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:59:28,232 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:59:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 801060666, now seen corresponding path program 1 times [2022-11-25 23:59:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:59:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775988237] [2022-11-25 23:59:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:28,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:59:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:59:28,234 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:59:28,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-25 23:59:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:28,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:59:28,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:28,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:59:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:59:28,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:59:29,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:59:29,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775988237] [2022-11-25 23:59:29,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775988237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:29,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [836030478] [2022-11-25 23:59:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:29,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:59:29,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:59:29,192 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:59:29,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-25 23:59:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:59:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:29,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:29,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [836030478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:29,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357704732] [2022-11-25 23:59:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:29,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:29,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:29,962 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:29,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 23:59:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:59:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:30,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:59:30,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357704732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:30,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:59:30,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 21 [2022-11-25 23:59:30,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365154548] [2022-11-25 23:59:30,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:30,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:59:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:59:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:59:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:59:30,257 INFO L87 Difference]: Start difference. First operand 347 states and 1049 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:36,522 INFO L93 Difference]: Finished difference Result 1249 states and 3553 transitions. [2022-11-25 23:59:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:59:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:59:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:36,529 INFO L225 Difference]: With dead ends: 1249 [2022-11-25 23:59:36,529 INFO L226 Difference]: Without dead ends: 1249 [2022-11-25 23:59:36,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:59:36,530 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 742 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:36,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 0 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-25 23:59:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-25 23:59:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 543. [2022-11-25 23:59:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 529 states have (on average 3.5160680529300565) internal successors, (1860), 542 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1860 transitions. [2022-11-25 23:59:36,551 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1860 transitions. Word has length 10 [2022-11-25 23:59:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:36,551 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 1860 transitions. [2022-11-25 23:59:36,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1860 transitions. [2022-11-25 23:59:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:59:36,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:36,552 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-11-25 23:59:36,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:36,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:36,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:59:37,160 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-25 23:59:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash -302389802, now seen corresponding path program 1 times [2022-11-25 23:59:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:59:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355762233] [2022-11-25 23:59:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:37,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:59:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:59:37,162 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:59:37,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-25 23:59:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:59:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:37,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:59:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:37,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:39,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:59:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355762233] [2022-11-25 23:59:39,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355762233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033993624] [2022-11-25 23:59:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:39,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:59:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:59:39,880 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:59:39,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-25 23:59:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:40,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:59:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:40,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:59:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:40,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:42,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033993624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:42,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816599225] [2022-11-25 23:59:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:42,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:42,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:42,995 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:43,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 23:59:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:59:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:43,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:59:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:43,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:44,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816599225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:44,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:59:44,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-11-25 23:59:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208051121] [2022-11-25 23:59:44,161 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:44,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 23:59:44,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:59:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 23:59:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:59:44,163 INFO L87 Difference]: Start difference. First operand 543 states and 1860 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:49,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:59:51,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:59:53,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:59:55,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:59:56,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:59:58,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:00,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:02,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:04,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:06,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:08,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:10,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:11,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:15,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:17,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:18,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:20,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:21,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:23,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:25,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:30,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:32,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:37,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:39,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:00:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:55,616 INFO L93 Difference]: Finished difference Result 5961 states and 20589 transitions. [2022-11-26 00:00:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:00:55,620 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 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 10 [2022-11-26 00:00:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:55,637 INFO L225 Difference]: With dead ends: 5961 [2022-11-26 00:00:55,637 INFO L226 Difference]: Without dead ends: 5961 [2022-11-26 00:00:55,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=977, Invalid=1885, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:00:55,638 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2283 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 67 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2283 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:55,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2283 Valid, 0 Invalid, 3727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3649 Invalid, 11 Unknown, 0 Unchecked, 59.2s Time] [2022-11-26 00:00:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2022-11-26 00:00:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 568. [2022-11-26 00:00:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 554 states have (on average 3.4458483754512637) internal successors, (1909), 567 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1909 transitions. [2022-11-26 00:00:55,687 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1909 transitions. Word has length 10 [2022-11-26 00:00:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:55,687 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 1909 transitions. [2022-11-26 00:00:55,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1909 transitions. [2022-11-26 00:00:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:00:55,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:55,688 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:55,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:55,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:56,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:00:56,301 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:00:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -127686572, now seen corresponding path program 2 times [2022-11-26 00:00:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:00:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238988824] [2022-11-26 00:00:56,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:00:56,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:00:56,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:00:56,304 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:00:56,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-26 00:00:56,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 00:00:56,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:00:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:00:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:56,522 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:00:56,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:00:56,600 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:00:56,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:00:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:56,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:00:56,731 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:00:56,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:00:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:00:56,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:00:56,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:00:56,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238988824] [2022-11-26 00:00:56,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238988824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:56,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:56,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:00:56,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942914512] [2022-11-26 00:00:56,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:56,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:00:56,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:00:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:00:56,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:56,817 INFO L87 Difference]: Start difference. First operand 568 states and 1909 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:57,299 INFO L93 Difference]: Finished difference Result 638 states and 2044 transitions. [2022-11-26 00:00:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:00:57,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 11 [2022-11-26 00:00:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:57,303 INFO L225 Difference]: With dead ends: 638 [2022-11-26 00:00:57,304 INFO L226 Difference]: Without dead ends: 638 [2022-11-26 00:00:57,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:57,305 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:57,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:00:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-26 00:00:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 536. [2022-11-26 00:00:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 522 states have (on average 3.388888888888889) internal successors, (1769), 535 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1769 transitions. [2022-11-26 00:00:57,322 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1769 transitions. Word has length 11 [2022-11-26 00:00:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:57,323 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 1769 transitions. [2022-11-26 00:00:57,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1769 transitions. [2022-11-26 00:00:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:00:57,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:57,324 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:57,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:57,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:00:57,536 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:00:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash 707011007, now seen corresponding path program 1 times [2022-11-26 00:00:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:00:57,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891726987] [2022-11-26 00:00:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:57,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:00:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:00:57,538 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:00:57,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-26 00:00:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:57,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:00:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:00:57,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:00:58,039 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:00:58,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891726987] [2022-11-26 00:00:58,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891726987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231779968] [2022-11-26 00:00:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:58,040 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:00:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:00:58,041 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:00:58,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-26 00:00:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:58,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:00:58,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:00:58,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:00:58,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1231779968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108499164] [2022-11-26 00:00:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:58,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:58,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:58,423 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:00:58,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-26 00:00:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:58,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:00:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:00:58,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:00:58,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108499164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:58,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:00:58,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-26 00:00:58,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98334319] [2022-11-26 00:00:58,681 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:00:58,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:00:58,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:00:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:00:58,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:00:58,682 INFO L87 Difference]: Start difference. First operand 536 states and 1769 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:00,394 INFO L93 Difference]: Finished difference Result 867 states and 2616 transitions. [2022-11-26 00:01:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:01:00,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:01:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:00,398 INFO L225 Difference]: With dead ends: 867 [2022-11-26 00:01:00,398 INFO L226 Difference]: Without dead ends: 867 [2022-11-26 00:01:00,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:01:00,399 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:00,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 2 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 00:01:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-26 00:01:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 553. [2022-11-26 00:01:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 539 states have (on average 3.3469387755102042) internal successors, (1804), 552 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1804 transitions. [2022-11-26 00:01:00,415 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1804 transitions. Word has length 11 [2022-11-26 00:01:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:00,416 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 1804 transitions. [2022-11-26 00:01:00,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1804 transitions. [2022-11-26 00:01:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:01:00,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:00,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:00,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:00,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:00,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-26 00:01:01,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:01:01,030 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:01:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash -896168008, now seen corresponding path program 1 times [2022-11-26 00:01:01,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:01:01,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358233891] [2022-11-26 00:01:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:01,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:01:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:01:01,032 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:01:01,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-26 00:01:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:01:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:01,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:01,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:01:01,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358233891] [2022-11-26 00:01:01,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358233891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:01,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [922602632] [2022-11-26 00:01:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:01,539 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:01:01,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:01:01,540 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:01:01,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-26 00:01:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:01,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:01:01,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:01,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:01,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [922602632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:01,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919736647] [2022-11-26 00:01:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:01,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:01,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:01,938 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:01,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-26 00:01:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:01:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:02,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:02,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919736647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:02,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:01:02,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-26 00:01:02,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635191110] [2022-11-26 00:01:02,234 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:02,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:01:02,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:01:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:01:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:01:02,236 INFO L87 Difference]: Start difference. First operand 553 states and 1804 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:03,722 INFO L93 Difference]: Finished difference Result 742 states and 2239 transitions. [2022-11-26 00:01:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:01:03,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:01:03,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:03,725 INFO L225 Difference]: With dead ends: 742 [2022-11-26 00:01:03,725 INFO L226 Difference]: Without dead ends: 742 [2022-11-26 00:01:03,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:01:03,726 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 126 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:03,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 18 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:01:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-11-26 00:01:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 610. [2022-11-26 00:01:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 596 states have (on average 3.3322147651006713) internal successors, (1986), 609 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1986 transitions. [2022-11-26 00:01:03,743 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1986 transitions. Word has length 11 [2022-11-26 00:01:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:03,744 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 1986 transitions. [2022-11-26 00:01:03,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1986 transitions. [2022-11-26 00:01:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:01:03,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:03,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:03,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:03,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:04,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:04,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:04,349 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:01:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1807896202, now seen corresponding path program 2 times [2022-11-26 00:01:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:01:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489531204] [2022-11-26 00:01:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:01:04,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:01:04,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:01:04,351 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:01:04,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-26 00:01:04,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:01:04,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:01:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:04,629 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:01:04,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-26 00:01:04,704 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:01:04,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:01:04,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:04,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:01:04,814 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:01:04,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:01:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:04,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:05,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:01:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489531204] [2022-11-26 00:01:05,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489531204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2125129976] [2022-11-26 00:01:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:01:05,920 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:01:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:01:05,921 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:01:05,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-26 00:01:06,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:01:06,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:01:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:06,369 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:01:06,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:01:06,445 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:01:06,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:01:06,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:06,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-26 00:01:06,692 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:01:06,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:01:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:07,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:12,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2125129976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:12,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997098625] [2022-11-26 00:01:12,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:01:12,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:12,183 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:12,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-26 00:01:12,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:01:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:01:12,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:12,489 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:01:12,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:01:12,562 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:01:12,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:01:12,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:12,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-26 00:01:12,791 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:01:12,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:01:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:13,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:15,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997098625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:15,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:01:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 27 [2022-11-26 00:01:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694480920] [2022-11-26 00:01:15,208 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:01:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:01:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:01:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:01:15,209 INFO L87 Difference]: Start difference. First operand 610 states and 1986 transitions. Second operand has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:35,349 INFO L93 Difference]: Finished difference Result 3231 states and 8895 transitions. [2022-11-26 00:01:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-26 00:01:35,350 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:01:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:35,361 INFO L225 Difference]: With dead ends: 3231 [2022-11-26 00:01:35,361 INFO L226 Difference]: Without dead ends: 3231 [2022-11-26 00:01:35,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1133, Invalid=4567, Unknown=0, NotChecked=0, Total=5700 [2022-11-26 00:01:35,363 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1529 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:35,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 0 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-11-26 00:01:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2022-11-26 00:01:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 740. [2022-11-26 00:01:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 726 states have (on average 3.349862258953168) internal successors, (2432), 739 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2432 transitions. [2022-11-26 00:01:35,404 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2432 transitions. Word has length 12 [2022-11-26 00:01:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:35,404 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 2432 transitions. [2022-11-26 00:01:35,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2432 transitions. [2022-11-26 00:01:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:01:35,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:35,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:35,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:35,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:35,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-26 00:01:36,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:36,018 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:01:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:36,019 INFO L85 PathProgramCache]: Analyzing trace with hash 883892079, now seen corresponding path program 2 times [2022-11-26 00:01:36,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:01:36,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474304959] [2022-11-26 00:01:36,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:01:36,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:01:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:01:36,020 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:01:36,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-26 00:01:36,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:01:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:01:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:36,315 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:01:36,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-26 00:01:36,384 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:01:36,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:01:36,472 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:01:36,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:01:36,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:01:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:36,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:01:37,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:01:37,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474304959] [2022-11-26 00:01:37,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474304959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:37,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239679720] [2022-11-26 00:01:37,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:01:37,666 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:01:37,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:01:37,671 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:01:37,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-26 00:01:38,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:01:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:01:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:38,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:01:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:38,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:39,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1239679720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:39,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732960618] [2022-11-26 00:01:39,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:01:39,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:39,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:39,475 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:39,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-26 00:01:39,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:01:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:01:39,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:40,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:01:40,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732960618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:40,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:01:40,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 6, 6] total 34 [2022-11-26 00:01:40,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233208797] [2022-11-26 00:01:40,727 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:40,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:01:40,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:01:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:01:40,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:01:40,729 INFO L87 Difference]: Start difference. First operand 740 states and 2432 transitions. Second operand has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:58,087 INFO L93 Difference]: Finished difference Result 1283 states and 3711 transitions. [2022-11-26 00:01:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:01:58,090 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 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 12 [2022-11-26 00:01:58,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:58,094 INFO L225 Difference]: With dead ends: 1283 [2022-11-26 00:01:58,094 INFO L226 Difference]: Without dead ends: 1283 [2022-11-26 00:01:58,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=570, Invalid=3212, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 00:01:58,096 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 849 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:58,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 0 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3908 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-11-26 00:01:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-11-26 00:01:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 594. [2022-11-26 00:01:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 580 states have (on average 3.4017241379310343) internal successors, (1973), 593 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1973 transitions. [2022-11-26 00:01:58,117 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1973 transitions. Word has length 12 [2022-11-26 00:01:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:58,117 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 1973 transitions. [2022-11-26 00:01:58,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1973 transitions. [2022-11-26 00:01:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:01:58,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:58,119 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-26 00:01:58,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:58,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:58,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:58,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:01:58,727 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:01:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:58,727 INFO L85 PathProgramCache]: Analyzing trace with hash 41358405, now seen corresponding path program 3 times [2022-11-26 00:01:58,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:01:58,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589894002] [2022-11-26 00:01:58,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:01:58,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:01:58,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:01:58,729 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:01:58,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-26 00:01:59,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:01:59,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:01:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:59,091 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:01:59,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:01:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:01:59,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:03,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:02:03,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589894002] [2022-11-26 00:02:03,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589894002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:03,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188994769] [2022-11-26 00:02:03,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:02:03,243 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:02:03,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:02:03,244 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:02:03,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-26 00:02:04,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:02:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:02:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:02:04,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:04,524 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:02:04,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:02:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:04,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:05,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1188994769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:05,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800141471] [2022-11-26 00:02:05,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:02:05,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:05,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:05,161 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:05,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-26 00:02:09,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:02:09,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:02:09,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:02:09,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:09,871 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:02:09,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:02:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800141471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:10,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:02:10,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 24 [2022-11-26 00:02:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181383727] [2022-11-26 00:02:10,599 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:10,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:02:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:02:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:02:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:02:10,601 INFO L87 Difference]: Start difference. First operand 594 states and 1973 transitions. Second operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:27,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:29,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:31,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:33,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:35,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:37,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:39,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:41,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:43,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:45,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:02:47,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:03:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:01,733 INFO L93 Difference]: Finished difference Result 6833 states and 23926 transitions. [2022-11-26 00:03:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:03:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 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 13 [2022-11-26 00:03:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:01,755 INFO L225 Difference]: With dead ends: 6833 [2022-11-26 00:03:01,756 INFO L226 Difference]: Without dead ends: 6833 [2022-11-26 00:03:01,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:03:01,757 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2925 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4334 mSolverCounterSat, 312 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2925 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 4334 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:01,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2925 Valid, 0 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 4334 Invalid, 9 Unknown, 0 Unchecked, 32.9s Time] [2022-11-26 00:03:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6833 states. [2022-11-26 00:03:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6833 to 604. [2022-11-26 00:03:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 590 states have (on average 3.3745762711864407) internal successors, (1991), 603 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1991 transitions. [2022-11-26 00:03:01,842 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1991 transitions. Word has length 13 [2022-11-26 00:03:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:01,842 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 1991 transitions. [2022-11-26 00:03:01,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1991 transitions. [2022-11-26 00:03:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:03:01,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:01,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:01,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:02,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:02,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:02,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:02,450 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:03:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash -169447586, now seen corresponding path program 1 times [2022-11-26 00:03:02,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:03:02,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84427793] [2022-11-26 00:03:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:02,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:03:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:03:02,453 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:03:02,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-26 00:03:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:03:02,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:02,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:03,245 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 23 [2022-11-26 00:03:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:03,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:03:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84427793] [2022-11-26 00:03:03,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84427793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117721588] [2022-11-26 00:03:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:03,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:03:03,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:03:03,473 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:03:03,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-26 00:03:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:03,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:03:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:03,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:03:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:04,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:05,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2117721588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:05,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807642373] [2022-11-26 00:03:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:05,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:05,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:03:05,002 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:03:05,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-26 00:03:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:05,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:03:05,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:05,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:03:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:05,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:05,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807642373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:05,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:03:05,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 25 [2022-11-26 00:03:05,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051845845] [2022-11-26 00:03:05,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:03:05,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:03:05,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:03:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:03:05,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:03:05,757 INFO L87 Difference]: Start difference. First operand 604 states and 1991 transitions. Second operand has 26 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:11,694 INFO L93 Difference]: Finished difference Result 2789 states and 8691 transitions. [2022-11-26 00:03:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:03:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:03:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:11,700 INFO L225 Difference]: With dead ends: 2789 [2022-11-26 00:03:11,700 INFO L226 Difference]: Without dead ends: 2789 [2022-11-26 00:03:11,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=435, Invalid=1545, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:03:11,701 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1179 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:11,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 0 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-26 00:03:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2022-11-26 00:03:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 604. [2022-11-26 00:03:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 590 states have (on average 3.2864406779661017) internal successors, (1939), 603 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1939 transitions. [2022-11-26 00:03:11,741 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1939 transitions. Word has length 13 [2022-11-26 00:03:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:11,742 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 1939 transitions. [2022-11-26 00:03:11,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1939 transitions. [2022-11-26 00:03:11,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:03:11,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:11,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:11,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:11,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:12,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:12,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:03:12,351 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:03:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash 205062102, now seen corresponding path program 1 times [2022-11-26 00:03:12,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:03:12,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88629848] [2022-11-26 00:03:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:12,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:03:12,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:03:12,353 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:03:12,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-26 00:03:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:03:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:03:12,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:03:12,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:03:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88629848] [2022-11-26 00:03:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88629848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:03:12,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:03:12,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:03:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524718054] [2022-11-26 00:03:12,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:03:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:03:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:03:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:03:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:03:12,724 INFO L87 Difference]: Start difference. First operand 604 states and 1939 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:13,300 INFO L93 Difference]: Finished difference Result 661 states and 2040 transitions. [2022-11-26 00:03:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:03:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-26 00:03:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:13,303 INFO L225 Difference]: With dead ends: 661 [2022-11-26 00:03:13,304 INFO L226 Difference]: Without dead ends: 638 [2022-11-26 00:03:13,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:03:13,304 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:13,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:03:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-26 00:03:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 604. [2022-11-26 00:03:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 590 states have (on average 3.259322033898305) internal successors, (1923), 603 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1923 transitions. [2022-11-26 00:03:13,320 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1923 transitions. Word has length 13 [2022-11-26 00:03:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:13,321 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 1923 transitions. [2022-11-26 00:03:13,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1923 transitions. [2022-11-26 00:03:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:03:13,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:13,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:13,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:03:13,534 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:03:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1897496774, now seen corresponding path program 2 times [2022-11-26 00:03:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:03:13,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667709018] [2022-11-26 00:03:13,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:03:13,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:03:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:03:13,536 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:03:13,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-26 00:03:13,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 00:03:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:03:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:03:13,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:03:13,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:03:13,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667709018] [2022-11-26 00:03:13,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667709018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:03:13,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:03:13,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:03:13,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108908289] [2022-11-26 00:03:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:03:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:03:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:03:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:03:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:03:13,869 INFO L87 Difference]: Start difference. First operand 604 states and 1923 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:14,399 INFO L93 Difference]: Finished difference Result 673 states and 2061 transitions. [2022-11-26 00:03:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:03:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-26 00:03:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:14,402 INFO L225 Difference]: With dead ends: 673 [2022-11-26 00:03:14,402 INFO L226 Difference]: Without dead ends: 660 [2022-11-26 00:03:14,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:03:14,403 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:14,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:03:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-26 00:03:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 604. [2022-11-26 00:03:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 590 states have (on average 3.2457627118644066) internal successors, (1915), 603 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1915 transitions. [2022-11-26 00:03:14,419 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1915 transitions. Word has length 13 [2022-11-26 00:03:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:14,419 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 1915 transitions. [2022-11-26 00:03:14,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1915 transitions. [2022-11-26 00:03:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:03:14,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:14,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:14,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:03:14,633 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:03:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash -957902806, now seen corresponding path program 3 times [2022-11-26 00:03:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:03:14,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111308103] [2022-11-26 00:03:14,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:03:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:03:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:03:14,634 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:03:14,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-26 00:03:14,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:03:14,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:03:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:14,963 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:03:14,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:03:15,039 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:03:15,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:03:15,127 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:03:15,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:03:15,148 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:03:15,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:03:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:03:15,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:03:16,509 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:03:16,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111308103] [2022-11-26 00:03:16,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111308103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:16,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2082806661] [2022-11-26 00:03:16,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:03:16,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:03:16,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:03:16,510 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:03:16,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-26 00:03:16,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:03:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:03:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:16,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:03:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:17,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:18,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2082806661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:18,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097747770] [2022-11-26 00:03:18,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:03:18,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:03:18,706 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:03:18,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-26 00:03:18,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:03:18,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:03:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:18,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:03:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:19,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:03:19,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097747770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:19,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:03:19,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8, 8, 8, 8] total 29 [2022-11-26 00:03:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110971246] [2022-11-26 00:03:19,968 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:03:19,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:03:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:03:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:03:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:03:19,969 INFO L87 Difference]: Start difference. First operand 604 states and 1915 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:46,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:03:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:59,881 INFO L93 Difference]: Finished difference Result 2541 states and 7355 transitions. [2022-11-26 00:03:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-26 00:03:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:03:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:59,902 INFO L225 Difference]: With dead ends: 2541 [2022-11-26 00:03:59,902 INFO L226 Difference]: Without dead ends: 2541 [2022-11-26 00:03:59,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=733, Invalid=3689, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:03:59,904 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2293 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2293 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:59,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2293 Valid, 0 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2285 Invalid, 1 Unknown, 0 Unchecked, 17.0s Time] [2022-11-26 00:03:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2022-11-26 00:03:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1072. [2022-11-26 00:03:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1058 states have (on average 3.8005671077504726) internal successors, (4021), 1071 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 4021 transitions. [2022-11-26 00:03:59,942 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 4021 transitions. Word has length 14 [2022-11-26 00:03:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:59,943 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 4021 transitions. [2022-11-26 00:03:59,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 4021 transitions. [2022-11-26 00:03:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:03:59,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:59,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:59,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:00,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:00,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:00,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:00,553 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:04:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:00,554 INFO L85 PathProgramCache]: Analyzing trace with hash -957902843, now seen corresponding path program 2 times [2022-11-26 00:04:00,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:00,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077839686] [2022-11-26 00:04:00,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:04:00,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:00,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:00,556 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:00,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-26 00:04:00,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:04:00,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:04:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:00,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:04:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:01,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:02,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077839686] [2022-11-26 00:04:02,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077839686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1975351981] [2022-11-26 00:04:02,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:04:02,292 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:02,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:04:02,292 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:04:02,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-26 00:04:02,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:04:02,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:04:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:02,801 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:04:02,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:04:02,990 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-26 00:04:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:03,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:04,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1975351981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:04,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305538848] [2022-11-26 00:04:04,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:04:04,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:04,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:04,406 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:04,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-26 00:04:04,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:04:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:04,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:04:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:05,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:05,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305538848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:05,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:04:05,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 7, 7, 7] total 33 [2022-11-26 00:04:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092698878] [2022-11-26 00:04:05,418 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:04:05,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:04:05,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:05,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:04:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:04:05,421 INFO L87 Difference]: Start difference. First operand 1072 states and 4021 transitions. Second operand has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:34,752 INFO L93 Difference]: Finished difference Result 2079 states and 5818 transitions. [2022-11-26 00:04:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-26 00:04:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:04:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:34,760 INFO L225 Difference]: With dead ends: 2079 [2022-11-26 00:04:34,760 INFO L226 Difference]: Without dead ends: 2079 [2022-11-26 00:04:34,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=906, Invalid=4794, Unknown=0, NotChecked=0, Total=5700 [2022-11-26 00:04:34,761 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1657 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5081 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:34,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1657 Valid, 0 Invalid, 5100 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 5081 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2022-11-26 00:04:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-11-26 00:04:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 879. [2022-11-26 00:04:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 865 states have (on average 3.428901734104046) internal successors, (2966), 878 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2966 transitions. [2022-11-26 00:04:34,794 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2966 transitions. Word has length 14 [2022-11-26 00:04:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:34,796 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 2966 transitions. [2022-11-26 00:04:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2966 transitions. [2022-11-26 00:04:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:04:34,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:34,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:34,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:35,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:35,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:35,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:35,403 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:04:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2073529958, now seen corresponding path program 1 times [2022-11-26 00:04:35,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:35,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780034185] [2022-11-26 00:04:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:35,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:35,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:35,406 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:35,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-26 00:04:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:04:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:35,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:35,778 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 9 [2022-11-26 00:04:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:35,966 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780034185] [2022-11-26 00:04:35,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780034185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [157855048] [2022-11-26 00:04:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:35,966 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:04:35,969 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:04:35,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-26 00:04:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:04:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:04:36,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:36,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [157855048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:36,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:04:36,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6] total 11 [2022-11-26 00:04:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747250453] [2022-11-26 00:04:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:04:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:04:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:04:36,270 INFO L87 Difference]: Start difference. First operand 879 states and 2966 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:36,684 INFO L93 Difference]: Finished difference Result 917 states and 3027 transitions. [2022-11-26 00:04:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:04:36,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:04:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:36,687 INFO L225 Difference]: With dead ends: 917 [2022-11-26 00:04:36,687 INFO L226 Difference]: Without dead ends: 917 [2022-11-26 00:04:36,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:04:36,687 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:36,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:04:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-11-26 00:04:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 811. [2022-11-26 00:04:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 800 states have (on average 3.45) internal successors, (2760), 810 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2760 transitions. [2022-11-26 00:04:36,723 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2760 transitions. Word has length 14 [2022-11-26 00:04:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:36,724 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 2760 transitions. [2022-11-26 00:04:36,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2760 transitions. [2022-11-26 00:04:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:04:36,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:36,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:36,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:36,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:37,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:37,134 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:04:37,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2073531276, now seen corresponding path program 3 times [2022-11-26 00:04:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:37,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016519255] [2022-11-26 00:04:37,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:04:37,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:37,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:37,136 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:37,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-26 00:04:37,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:04:37,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:04:37,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:37,544 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:04:37,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:04:37,623 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-26 00:04:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:37,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:38,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016519255] [2022-11-26 00:04:38,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016519255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1340869374] [2022-11-26 00:04:38,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:04:38,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:04:38,287 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:04:38,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-26 00:04:38,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:04:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:04:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:39,010 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:04:39,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:04:39,157 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:04:39,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-26 00:04:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:39,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:41,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1340869374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:41,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420185490] [2022-11-26 00:04:41,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:04:41,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:41,072 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:41,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-26 00:04:41,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:04:41,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:04:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:41,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:04:42,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420185490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:42,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:04:42,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10, 10, 7, 7] total 31 [2022-11-26 00:04:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832863834] [2022-11-26 00:04:42,198 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:04:42,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 00:04:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 00:04:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:04:42,199 INFO L87 Difference]: Start difference. First operand 811 states and 2760 transitions. Second operand has 33 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:54,359 INFO L93 Difference]: Finished difference Result 1498 states and 4317 transitions. [2022-11-26 00:04:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:04:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:04:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:54,364 INFO L225 Difference]: With dead ends: 1498 [2022-11-26 00:04:54,364 INFO L226 Difference]: Without dead ends: 1498 [2022-11-26 00:04:54,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=634, Invalid=2018, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:04:54,365 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 761 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:54,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 0 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-26 00:04:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-11-26 00:04:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 769. [2022-11-26 00:04:54,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 758 states have (on average 3.4155672823219) internal successors, (2589), 768 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2589 transitions. [2022-11-26 00:04:54,383 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2589 transitions. Word has length 14 [2022-11-26 00:04:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:54,383 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 2589 transitions. [2022-11-26 00:04:54,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2589 transitions. [2022-11-26 00:04:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:04:54,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:54,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:54,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:54,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:54,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-26 00:04:54,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:54,999 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:04:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash 274539040, now seen corresponding path program 1 times [2022-11-26 00:04:55,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:55,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767211621] [2022-11-26 00:04:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:55,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:55,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:55,001 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:55,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-26 00:04:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:55,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:04:55,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:55,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:55,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:55,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767211621] [2022-11-26 00:04:55,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767211621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:55,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:55,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:04:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840664039] [2022-11-26 00:04:55,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:55,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:04:55,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:04:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:04:55,197 INFO L87 Difference]: Start difference. First operand 769 states and 2589 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:55,428 INFO L93 Difference]: Finished difference Result 769 states and 2455 transitions. [2022-11-26 00:04:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:04:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:04:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:55,431 INFO L225 Difference]: With dead ends: 769 [2022-11-26 00:04:55,431 INFO L226 Difference]: Without dead ends: 769 [2022-11-26 00:04:55,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:04:55,432 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:55,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:04:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-11-26 00:04:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2022-11-26 00:04:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 758 states have (on average 3.2387862796833775) internal successors, (2455), 768 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2455 transitions. [2022-11-26 00:04:55,447 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2455 transitions. Word has length 14 [2022-11-26 00:04:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:55,447 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 2455 transitions. [2022-11-26 00:04:55,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2455 transitions. [2022-11-26 00:04:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:04:55,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:55,448 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:55,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:55,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:55,649 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:04:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1882379381, now seen corresponding path program 4 times [2022-11-26 00:04:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:55,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476862550] [2022-11-26 00:04:55,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:04:55,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:55,650 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:55,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-26 00:04:55,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:04:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:04:55,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:55,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:04:56,051 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-26 00:04:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:56,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:56,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:56,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476862550] [2022-11-26 00:04:56,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476862550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:56,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [671754961] [2022-11-26 00:04:56,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:04:56,639 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:04:56,643 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:04:56,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-26 00:04:57,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:04:57,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:57,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:04:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:57,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:57,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [671754961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990420431] [2022-11-26 00:04:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:04:57,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:57,464 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:57,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-26 00:04:57,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:04:57,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:04:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:57,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:04:57,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990420431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:57,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:04:57,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 22 [2022-11-26 00:04:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205530213] [2022-11-26 00:04:57,996 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:04:57,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:04:57,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:04:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:04:57,999 INFO L87 Difference]: Start difference. First operand 769 states and 2455 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:01,182 INFO L93 Difference]: Finished difference Result 1155 states and 3257 transitions. [2022-11-26 00:05:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:05:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:05:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:01,186 INFO L225 Difference]: With dead ends: 1155 [2022-11-26 00:05:01,186 INFO L226 Difference]: Without dead ends: 1155 [2022-11-26 00:05:01,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:05:01,187 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 391 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:01,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 2 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:05:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-11-26 00:05:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 648. [2022-11-26 00:05:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 637 states have (on average 3.152276295133438) internal successors, (2008), 647 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2008 transitions. [2022-11-26 00:05:01,200 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2008 transitions. Word has length 15 [2022-11-26 00:05:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:01,200 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 2008 transitions. [2022-11-26 00:05:01,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2008 transitions. [2022-11-26 00:05:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:05:01,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:01,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:01,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:01,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:01,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:01,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:05:01,802 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:05:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1497017036, now seen corresponding path program 1 times [2022-11-26 00:05:01,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:01,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183736741] [2022-11-26 00:05:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:01,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:05:01,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:01,804 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:05:01,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-26 00:05:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:05:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:02,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:02,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:02,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183736741] [2022-11-26 00:05:02,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183736741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:02,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:02,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:05:02,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448133733] [2022-11-26 00:05:02,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:05:02,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:02,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:05:02,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:02,440 INFO L87 Difference]: Start difference. First operand 648 states and 2008 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:03,677 INFO L93 Difference]: Finished difference Result 680 states and 2063 transitions. [2022-11-26 00:05:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:05:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:05:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:03,680 INFO L225 Difference]: With dead ends: 680 [2022-11-26 00:05:03,680 INFO L226 Difference]: Without dead ends: 648 [2022-11-26 00:05:03,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:05:03,680 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:03,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 5 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:05:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-11-26 00:05:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2022-11-26 00:05:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 637 states have (on average 3.1507064364207222) internal successors, (2007), 647 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2007 transitions. [2022-11-26 00:05:03,691 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2007 transitions. Word has length 15 [2022-11-26 00:05:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:03,691 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 2007 transitions. [2022-11-26 00:05:03,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2007 transitions. [2022-11-26 00:05:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:05:03,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:03,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:03,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:03,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:05:03,905 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-26 00:05:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1795689175, now seen corresponding path program 5 times [2022-11-26 00:05:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:03,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982468074] [2022-11-26 00:05:03,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:05:03,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:05:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:03,908 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:05:03,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-26 00:05:04,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-26 00:05:04,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:05:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:04,402 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:05:04,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:05:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:04,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-26 00:05:04,603 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:05:04,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:05:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:05:05,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:07,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:05:07,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 87 [2022-11-26 00:05:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:05:08,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:08,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982468074] [2022-11-26 00:05:08,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982468074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:08,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23206041] [2022-11-26 00:05:08,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:05:08,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:08,514 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:08,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-26 00:05:10,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-26 00:05:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:05:10,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:10,885 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:05:10,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:05:10,963 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:05:10,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:05:11,427 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:05:11,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:05:11,452 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:05:11,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:05:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:05:11,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:05:14,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23206041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503794076] [2022-11-26 00:05:14,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:05:14,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:14,790 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:14,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3375046-02e6-41da-94e7-960797cb0de0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-26 00:05:18,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-26 00:05:18,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:18,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-26 00:05:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:18,158 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:05:18,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:05:18,597 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:05:18,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-26 00:05:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:19,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:36,775 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:05:44,056 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:05:52,905 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:05:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:52,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503794076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:52,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:05:52,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 9, 12, 13] total 44 [2022-11-26 00:05:52,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799884231] [2022-11-26 00:05:52,906 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:52,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-26 00:05:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-26 00:05:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1817, Unknown=4, NotChecked=0, Total=2070 [2022-11-26 00:05:52,908 INFO L87 Difference]: Start difference. First operand 648 states and 2007 transitions. Second operand has 46 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:39,452 WARN L233 SmtUtils]: Spent 33.98s on a formula simplification. DAG size of input: 124 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:07:16,542 WARN L233 SmtUtils]: Spent 29.66s on a formula simplification. DAG size of input: 98 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:07:45,496 WARN L233 SmtUtils]: Spent 21.15s on a formula simplification. DAG size of input: 155 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:08:10,759 WARN L233 SmtUtils]: Spent 19.69s on a formula simplification. DAG size of input: 89 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)