./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0 --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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-e04fb08 [2022-11-16 16:30:35,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:30:35,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:30:35,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:30:35,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:30:35,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:30:35,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:30:35,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:30:35,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:30:35,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:30:35,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:30:35,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:30:35,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:30:35,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:30:35,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:30:35,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:30:35,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:30:35,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:30:35,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:30:35,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:30:35,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:30:35,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:30:35,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:30:35,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:30:35,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:30:35,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:30:35,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:30:35,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:30:35,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:30:35,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:30:35,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:30:35,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:30:35,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:30:35,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:30:36,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:30:36,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:30:36,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:30:36,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:30:36,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:30:36,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:30:36,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:30:36,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 16:30:36,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:30:36,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:30:36,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:30:36,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:30:36,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:30:36,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:30:36,053 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:30:36,053 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:30:36,053 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:30:36,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:30:36,054 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:30:36,054 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:30:36,055 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:30:36,055 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:30:36,055 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:30:36,055 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:30:36,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:30:36,056 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:30:36,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:30:36,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:30:36,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:30:36,057 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:30:36,057 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:30:36,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:30:36,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:30:36,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:30:36,058 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:30:36,058 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:30:36,058 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:30:36,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:30:36,059 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:30:36,059 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:30:36,059 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:30:36,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:30:36,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:30:36,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:30:36,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:30:36,060 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:30:36,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:30:36,060 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:30:36,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:30:36,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:30:36,062 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-11-16 16:30:36,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:30:36,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:30:36,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:30:36,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:30:36,480 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:30:36,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-16 16:30:36,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/9f973ac23/51e9dcbebf3242ccb77a3f11bfc47f0a/FLAGe3ec378a4 [2022-11-16 16:30:37,226 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:30:37,228 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-16 16:30:37,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/9f973ac23/51e9dcbebf3242ccb77a3f11bfc47f0a/FLAGe3ec378a4 [2022-11-16 16:30:37,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/9f973ac23/51e9dcbebf3242ccb77a3f11bfc47f0a [2022-11-16 16:30:37,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:30:37,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:30:37,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:30:37,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:30:37,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:30:37,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:30:37" (1/1) ... [2022-11-16 16:30:37,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17843b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:37, skipping insertion in model container [2022-11-16 16:30:37,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:30:37" (1/1) ... [2022-11-16 16:30:37,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:30:37,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:30:37,870 WARN L229 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-16 16:30:37,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:30:37,890 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) [2022-11-16 16:30:37,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a4a3c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:37, skipping insertion in model container [2022-11-16 16:30:37,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:30:37,892 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 16:30:37,894 INFO L158 Benchmark]: Toolchain (without parser) took 313.14ms. Allocated memory is still 115.3MB. Free memory was 79.8MB in the beginning and 91.1MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 16:30:37,895 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory was 86.2MB in the beginning and 86.2MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:30:37,896 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.83ms. Allocated memory is still 115.3MB. Free memory was 79.6MB in the beginning and 91.1MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 16:30:37,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory was 86.2MB in the beginning and 86.2MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.83ms. Allocated memory is still 115.3MB. Free memory was 79.6MB in the beginning and 91.1MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0 --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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-e04fb08 [2022-11-16 16:30:40,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:30:40,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:30:40,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:30:40,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:30:40,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:30:40,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:30:40,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:30:40,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:30:40,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:30:40,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:30:40,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:30:40,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:30:40,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:30:40,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:30:40,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:30:40,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:30:40,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:30:40,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:30:40,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:30:40,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:30:40,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:30:40,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:30:40,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:30:40,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:30:40,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:30:40,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:30:40,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:30:40,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:30:40,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:30:40,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:30:40,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:30:40,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:30:40,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:30:40,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:30:40,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:30:40,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:30:40,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:30:40,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:30:40,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:30:40,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:30:40,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-16 16:30:40,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:30:40,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:30:40,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:30:40,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:30:40,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:30:40,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:30:40,304 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:30:40,304 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:30:40,305 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:30:40,305 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:30:40,305 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:30:40,305 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:30:40,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:30:40,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:30:40,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:30:40,307 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:30:40,307 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:30:40,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:30:40,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:30:40,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:30:40,308 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:30:40,308 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:30:40,308 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:30:40,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:30:40,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:30:40,309 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 16:30:40,309 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 16:30:40,309 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:30:40,309 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:30:40,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:30:40,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 16:30:40,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:30:40,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:30:40,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:30:40,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:30:40,311 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 16:30:40,311 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:40,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:30:40,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 16:30:40,312 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-11-16 16:30:40,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:30:40,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:30:40,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:30:40,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:30:40,760 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:30:40,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-16 16:30:40,850 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/79b646374/16341935341b4fbb9280dd7eada9d5fa/FLAG936388fbb [2022-11-16 16:30:41,342 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:30:41,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-16 16:30:41,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/79b646374/16341935341b4fbb9280dd7eada9d5fa/FLAG936388fbb [2022-11-16 16:30:41,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/data/79b646374/16341935341b4fbb9280dd7eada9d5fa [2022-11-16 16:30:41,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:30:41,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:30:41,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:30:41,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:30:41,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:30:41,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:30:41" (1/1) ... [2022-11-16 16:30:41,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@910b28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:41, skipping insertion in model container [2022-11-16 16:30:41,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:30:41" (1/1) ... [2022-11-16 16:30:41,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:30:41,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:30:41,943 WARN L229 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-16 16:30:41,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:30:42,010 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 16:30:42,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:30:42,057 WARN L229 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-16 16:30:42,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:30:42,073 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:30:42,118 WARN L229 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_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-16 16:30:42,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:30:42,160 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:30:42,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42 WrapperNode [2022-11-16 16:30:42,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:30:42,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:30:42,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:30:42,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:30:42,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,235 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-11-16 16:30:42,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:30:42,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:30:42,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:30:42,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:30:42,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:30:42,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:30:42,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:30:42,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:30:42,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (1/1) ... [2022-11-16 16:30:42,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:30:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:30:42,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:30:42,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:30:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:30:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 16:30:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:30:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 16:30:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 16:30:42,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 16:30:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 16:30:42,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 16:30:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 16:30:42,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 16:30:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 16:30:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:30:42,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:30:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:30:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 16:30:42,412 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 16:30:42,637 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:30:42,646 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:30:43,334 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:30:43,347 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:30:43,348 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 16:30:43,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:30:43 BoogieIcfgContainer [2022-11-16 16:30:43,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:30:43,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:30:43,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:30:43,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:30:43,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:30:41" (1/3) ... [2022-11-16 16:30:43,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a852cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:30:43, skipping insertion in model container [2022-11-16 16:30:43,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:30:42" (2/3) ... [2022-11-16 16:30:43,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a852cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:30:43, skipping insertion in model container [2022-11-16 16:30:43,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:30:43" (3/3) ... [2022-11-16 16:30:43,368 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-11-16 16:30:43,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:30:43,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-16 16:30:43,383 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 16:30:43,569 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 16:30:43,632 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:30:43,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 211 transitions, 446 flow [2022-11-16 16:30:43,652 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 211 transitions, 446 flow [2022-11-16 16:30:43,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 211 transitions, 446 flow [2022-11-16 16:30:43,746 INFO L130 PetriNetUnfolder]: 15/208 cut-off events. [2022-11-16 16:30:43,746 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 16:30:43,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 15/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 328 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2022-11-16 16:30:43,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2022-11-16 16:31:21,334 INFO L134 LiptonReduction]: Checked pairs total: 8025 [2022-11-16 16:31:21,334 INFO L136 LiptonReduction]: Total number of compositions: 230 [2022-11-16 16:31:21,342 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2022-11-16 16:31:21,506 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:21,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:31:21,532 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;@7a604b22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:31:21,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-16 16:31:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:31:21,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:21,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:31:21,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 26030, now seen corresponding path program 1 times [2022-11-16 16:31:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798073755] [2022-11-16 16:31:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:21,569 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 [2022-11-16 16:31:21,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:21,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:21,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:31:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:21,974 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 16:31:21,975 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 16:31:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:22,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:22,021 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798073755] [2022-11-16 16:31:22,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798073755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:22,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:22,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:31:22,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645005976] [2022-11-16 16:31:22,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:22,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:22,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:22,071 INFO L87 Difference]: Start difference. First operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 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) [2022-11-16 16:31:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:22,439 INFO L93 Difference]: Finished difference Result 1600 states and 6035 transitions. [2022-11-16 16:31:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:22,442 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 [2022-11-16 16:31:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:22,511 INFO L225 Difference]: With dead ends: 1600 [2022-11-16 16:31:22,512 INFO L226 Difference]: Without dead ends: 1600 [2022-11-16 16:31:22,513 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 [2022-11-16 16:31:22,516 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:22,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:31:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2022-11-16 16:31:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1600. [2022-11-16 16:31:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1325 states have (on average 4.554716981132075) internal successors, (6035), 1599 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6035 transitions. [2022-11-16 16:31:22,684 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6035 transitions. Word has length 2 [2022-11-16 16:31:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:22,685 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 6035 transitions. [2022-11-16 16:31:22,687 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) [2022-11-16 16:31:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6035 transitions. [2022-11-16 16:31:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:31:22,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:22,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:31:22,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:22,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash 26031, now seen corresponding path program 1 times [2022-11-16 16:31:22,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:22,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381895968] [2022-11-16 16:31:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:22,918 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 [2022-11-16 16:31:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:22,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:22,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:31:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:23,206 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:23,206 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:23,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:23,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:23,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381895968] [2022-11-16 16:31:23,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381895968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:23,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:23,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:31:23,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840194195] [2022-11-16 16:31:23,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:23,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:23,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:23,250 INFO L87 Difference]: Start difference. First operand 1600 states and 6035 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) [2022-11-16 16:31:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:23,901 INFO L93 Difference]: Finished difference Result 3198 states and 12068 transitions. [2022-11-16 16:31:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:23,902 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 [2022-11-16 16:31:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:23,931 INFO L225 Difference]: With dead ends: 3198 [2022-11-16 16:31:23,931 INFO L226 Difference]: Without dead ends: 3198 [2022-11-16 16:31:23,931 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 [2022-11-16 16:31:23,933 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:23,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:31:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-11-16 16:31:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 1601. [2022-11-16 16:31:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1326 states have (on average 4.5542986425339365) internal successors, (6039), 1600 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 6039 transitions. [2022-11-16 16:31:24,034 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 6039 transitions. Word has length 2 [2022-11-16 16:31:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:24,035 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 6039 transitions. [2022-11-16 16:31:24,035 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) [2022-11-16 16:31:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 6039 transitions. [2022-11-16 16:31:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:31:24,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:24,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:31:24,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:24,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:24,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash 26232, now seen corresponding path program 1 times [2022-11-16 16:31:24,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:24,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260277709] [2022-11-16 16:31:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:24,257 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 [2022-11-16 16:31:24,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:24,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:24,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:31:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:24,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:24,403 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260277709] [2022-11-16 16:31:24,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260277709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:24,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:24,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:31:24,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400566652] [2022-11-16 16:31:24,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:24,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:24,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:24,409 INFO L87 Difference]: Start difference. First operand 1601 states and 6039 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) [2022-11-16 16:31:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:24,805 INFO L93 Difference]: Finished difference Result 1601 states and 6036 transitions. [2022-11-16 16:31:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:24,806 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 [2022-11-16 16:31:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:24,820 INFO L225 Difference]: With dead ends: 1601 [2022-11-16 16:31:24,820 INFO L226 Difference]: Without dead ends: 1601 [2022-11-16 16:31:24,821 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 [2022-11-16 16:31:24,828 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:24,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:31:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-11-16 16:31:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2022-11-16 16:31:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1326 states have (on average 4.552036199095022) internal successors, (6036), 1600 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 6036 transitions. [2022-11-16 16:31:24,974 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 6036 transitions. Word has length 2 [2022-11-16 16:31:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:24,975 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 6036 transitions. [2022-11-16 16:31:24,975 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) [2022-11-16 16:31:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 6036 transitions. [2022-11-16 16:31:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:31:24,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:24,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:31:25,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:25,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:25,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:25,178 INFO L85 PathProgramCache]: Analyzing trace with hash 811695, now seen corresponding path program 1 times [2022-11-16 16:31:25,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:25,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945170974] [2022-11-16 16:31:25,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:25,179 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 [2022-11-16 16:31:25,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:25,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:25,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:31:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:31:25,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:25,460 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:25,460 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:25,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:25,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945170974] [2022-11-16 16:31:25,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945170974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1258431811] [2022-11-16 16:31:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:25,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:25,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:25,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-16 16:31:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:26,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:31:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:26,245 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:26,246 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:26,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:26,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1258431811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481993679] [2022-11-16 16:31:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:26,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:26,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:26,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 16:31:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:31:26,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:26,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:26,621 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:26,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:26,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481993679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:26,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:31:26,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-16 16:31:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940490575] [2022-11-16 16:31:26,844 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:31:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:31:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:31:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:31:26,845 INFO L87 Difference]: Start difference. First operand 1601 states and 6036 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) [2022-11-16 16:31:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:29,233 INFO L93 Difference]: Finished difference Result 4798 states and 18106 transitions. [2022-11-16 16:31:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:31:29,234 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 [2022-11-16 16:31:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:29,292 INFO L225 Difference]: With dead ends: 4798 [2022-11-16 16:31:29,292 INFO L226 Difference]: Without dead ends: 4798 [2022-11-16 16:31:29,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:31:29,293 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 279 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:29,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 12 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-16 16:31:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2022-11-16 16:31:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 1604. [2022-11-16 16:31:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1329 states have (on average 4.55079006772009) internal successors, (6048), 1603 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 6048 transitions. [2022-11-16 16:31:29,426 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 6048 transitions. Word has length 3 [2022-11-16 16:31:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:29,427 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 6048 transitions. [2022-11-16 16:31:29,427 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) [2022-11-16 16:31:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 6048 transitions. [2022-11-16 16:31:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:31:29,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:29,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:31:29,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:29,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:29,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:30,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:30,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash 811896, now seen corresponding path program 1 times [2022-11-16 16:31:30,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:30,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689416642] [2022-11-16 16:31:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:30,030 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 [2022-11-16 16:31:30,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:30,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:30,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:30,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:30,216 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-16 16:31:30,217 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 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-16 16:31:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:30,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:30,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689416642] [2022-11-16 16:31:30,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689416642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:30,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:30,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:31:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687428532] [2022-11-16 16:31:30,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:30,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:30,320 INFO L87 Difference]: Start difference. First operand 1604 states and 6048 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) [2022-11-16 16:31:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:30,581 INFO L93 Difference]: Finished difference Result 1603 states and 6044 transitions. [2022-11-16 16:31:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:30,582 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 [2022-11-16 16:31:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:30,603 INFO L225 Difference]: With dead ends: 1603 [2022-11-16 16:31:30,603 INFO L226 Difference]: Without dead ends: 1603 [2022-11-16 16:31:30,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:30,605 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:30,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-16 16:31:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-11-16 16:31:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1603. [2022-11-16 16:31:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1329 states have (on average 4.54778028592927) internal successors, (6044), 1602 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 6044 transitions. [2022-11-16 16:31:30,677 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 6044 transitions. Word has length 3 [2022-11-16 16:31:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:30,677 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 6044 transitions. [2022-11-16 16:31:30,677 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) [2022-11-16 16:31:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 6044 transitions. [2022-11-16 16:31:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:31:30,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:30,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:31:30,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:30,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 811897, now seen corresponding path program 1 times [2022-11-16 16:31:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:30,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517760504] [2022-11-16 16:31:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:30,913 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 [2022-11-16 16:31:30,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:30,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:30,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:31:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:31,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:31,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:31,145 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-16 16:31:31,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-16 16:31:31,188 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:31:31,188 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 23 treesize of output 19 [2022-11-16 16:31:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:31,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:31,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:31,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517760504] [2022-11-16 16:31:31,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517760504] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:31,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:31:31,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-16 16:31:31,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391252470] [2022-11-16 16:31:31,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:31,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:31:31,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:31,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:31:31,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:31,439 INFO L87 Difference]: Start difference. First operand 1603 states and 6044 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) [2022-11-16 16:31:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:31,779 INFO L93 Difference]: Finished difference Result 1308 states and 4780 transitions. [2022-11-16 16:31:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:31,780 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 [2022-11-16 16:31:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:31,790 INFO L225 Difference]: With dead ends: 1308 [2022-11-16 16:31:31,790 INFO L226 Difference]: Without dead ends: 1308 [2022-11-16 16:31:31,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:31,791 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:31,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:31:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-11-16 16:31:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1308. [2022-11-16 16:31:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1099 states have (on average 4.34940855323021) internal successors, (4780), 1307 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4780 transitions. [2022-11-16 16:31:31,851 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4780 transitions. Word has length 3 [2022-11-16 16:31:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:31,852 INFO L495 AbstractCegarLoop]: Abstraction has 1308 states and 4780 transitions. [2022-11-16 16:31:31,853 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) [2022-11-16 16:31:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4780 transitions. [2022-11-16 16:31:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:31:31,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:31,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:31:31,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:32,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:32,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:32,069 INFO L85 PathProgramCache]: Analyzing trace with hash 780251839, now seen corresponding path program 1 times [2022-11-16 16:31:32,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:32,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637918988] [2022-11-16 16:31:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:32,070 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 [2022-11-16 16:31:32,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:32,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:32,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:31:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:32,288 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:31:32,289 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 16:31:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:32,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:32,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:32,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637918988] [2022-11-16 16:31:32,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637918988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:32,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:32,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:31:32,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662727034] [2022-11-16 16:31:32,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:32,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:32,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:32,473 INFO L87 Difference]: Start difference. First operand 1308 states and 4780 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) [2022-11-16 16:31:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:32,635 INFO L93 Difference]: Finished difference Result 1308 states and 4786 transitions. [2022-11-16 16:31:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:32,636 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 [2022-11-16 16:31:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:32,644 INFO L225 Difference]: With dead ends: 1308 [2022-11-16 16:31:32,644 INFO L226 Difference]: Without dead ends: 1308 [2022-11-16 16:31:32,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:32,645 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:32,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-16 16:31:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-11-16 16:31:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1308. [2022-11-16 16:31:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1099 states have (on average 4.3548680618744315) internal successors, (4786), 1307 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4786 transitions. [2022-11-16 16:31:32,692 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4786 transitions. Word has length 5 [2022-11-16 16:31:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:32,692 INFO L495 AbstractCegarLoop]: Abstraction has 1308 states and 4786 transitions. [2022-11-16 16:31:32,693 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) [2022-11-16 16:31:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4786 transitions. [2022-11-16 16:31:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:31:32,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:32,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:31:32,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:32,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 780251840, now seen corresponding path program 1 times [2022-11-16 16:31:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:32,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691679203] [2022-11-16 16:31:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:32,908 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 [2022-11-16 16:31:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:32,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:32,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:33,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:33,199 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 16:31:33,200 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 16:31:33,215 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 [2022-11-16 16:31:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:33,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:33,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:33,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691679203] [2022-11-16 16:31:33,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691679203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1499328760] [2022-11-16 16:31:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:33,807 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:33,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:33,811 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:33,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-16 16:31:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:31:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:34,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:34,160 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 16:31:34,161 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 16:31:34,179 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 42 treesize of output 38 [2022-11-16 16:31:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:34,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:34,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1499328760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:34,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:34,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:34,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920584902] [2022-11-16 16:31:34,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:34,298 INFO L87 Difference]: Start difference. First operand 1308 states and 4786 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) [2022-11-16 16:31:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:34,450 INFO L93 Difference]: Finished difference Result 1307 states and 4783 transitions. [2022-11-16 16:31:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:34,451 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 [2022-11-16 16:31:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:34,458 INFO L225 Difference]: With dead ends: 1307 [2022-11-16 16:31:34,458 INFO L226 Difference]: Without dead ends: 1307 [2022-11-16 16:31:34,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:34,461 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:34,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:31:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-11-16 16:31:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1307. [2022-11-16 16:31:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1098 states have (on average 4.356102003642987) internal successors, (4783), 1306 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4783 transitions. [2022-11-16 16:31:34,510 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4783 transitions. Word has length 5 [2022-11-16 16:31:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:34,511 INFO L495 AbstractCegarLoop]: Abstraction has 1307 states and 4783 transitions. [2022-11-16 16:31:34,511 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) [2022-11-16 16:31:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4783 transitions. [2022-11-16 16:31:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:31:34,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:34,512 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 16:31:34,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:34,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:34,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:34,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:34,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1583897169, now seen corresponding path program 2 times [2022-11-16 16:31:34,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:34,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216606462] [2022-11-16 16:31:34,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:31:34,926 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 [2022-11-16 16:31:34,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:34,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:34,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:31:35,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:31:35,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:31:35,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:31:35,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:35,203 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:35,203 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:35,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:36,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:36,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216606462] [2022-11-16 16:31:36,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216606462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:36,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1905717081] [2022-11-16 16:31:36,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:31:36,147 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:36,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:36,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:36,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-16 16:31:36,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:31:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:31:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:36,524 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:36,525 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:36,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:37,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1905717081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:37,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277723365] [2022-11-16 16:31:37,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:31:37,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:37,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:37,797 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:37,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 16:31:37,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:31:37,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:31:37,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:38,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:38,124 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:38,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:38,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277723365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:38,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:31:38,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-16 16:31:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882268829] [2022-11-16 16:31:38,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:31:38,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 16:31:38,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 16:31:38,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-16 16:31:38,415 INFO L87 Difference]: Start difference. First operand 1307 states and 4783 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:46,066 INFO L93 Difference]: Finished difference Result 11713 states and 42971 transitions. [2022-11-16 16:31:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:31:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2022-11-16 16:31:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:46,151 INFO L225 Difference]: With dead ends: 11713 [2022-11-16 16:31:46,151 INFO L226 Difference]: Without dead ends: 11713 [2022-11-16 16:31:46,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:31:46,154 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1496 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:46,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1496 Valid, 78 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 16:31:46,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11713 states. [2022-11-16 16:31:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11713 to 1313. [2022-11-16 16:31:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1104 states have (on average 4.343297101449275) internal successors, (4795), 1312 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 4795 transitions. [2022-11-16 16:31:46,299 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 4795 transitions. Word has length 6 [2022-11-16 16:31:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:46,300 INFO L495 AbstractCegarLoop]: Abstraction has 1313 states and 4795 transitions. [2022-11-16 16:31:46,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 4795 transitions. [2022-11-16 16:31:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:31:46,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:46,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:31:46,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:46,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:46,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-11-16 16:31:46,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:46,915 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1582003359, now seen corresponding path program 1 times [2022-11-16 16:31:46,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:46,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333634302] [2022-11-16 16:31:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:46,916 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 [2022-11-16 16:31:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:46,917 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:46,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 16:31:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:47,147 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 16:31:47,147 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 16:31:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:47,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:47,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:47,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333634302] [2022-11-16 16:31:47,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333634302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:47,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:47,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:31:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39967165] [2022-11-16 16:31:47,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:47,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:31:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:31:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:31:47,192 INFO L87 Difference]: Start difference. First operand 1313 states and 4795 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-16 16:31:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:47,452 INFO L93 Difference]: Finished difference Result 863 states and 3140 transitions. [2022-11-16 16:31:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:31:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-16 16:31:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:47,457 INFO L225 Difference]: With dead ends: 863 [2022-11-16 16:31:47,457 INFO L226 Difference]: Without dead ends: 863 [2022-11-16 16:31:47,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:31:47,458 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 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 [2022-11-16 16:31:47,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:31:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-16 16:31:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-11-16 16:31:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 760 states have (on average 4.131578947368421) internal successors, (3140), 862 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3140 transitions. [2022-11-16 16:31:47,485 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3140 transitions. Word has length 6 [2022-11-16 16:31:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:47,486 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 3140 transitions. [2022-11-16 16:31:47,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-16 16:31:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3140 transitions. [2022-11-16 16:31:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:31:47,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:47,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:31:47,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:47,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:47,699 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1582003357, now seen corresponding path program 1 times [2022-11-16 16:31:47,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:47,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114631558] [2022-11-16 16:31:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:47,700 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 [2022-11-16 16:31:47,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:47,702 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:47,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:31:47,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:47,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:48,126 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 [2022-11-16 16:31:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:48,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114631558] [2022-11-16 16:31:48,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114631558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676113385] [2022-11-16 16:31:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:48,225 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:48,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:48,226 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:48,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-16 16:31:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:31:48,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:48,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:48,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676113385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:48,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310514221] [2022-11-16 16:31:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:48,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:48,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:48,970 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:48,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 16:31:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:31:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:49,222 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:49,223 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:49,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:49,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310514221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:49,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:31:49,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 19 [2022-11-16 16:31:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101896518] [2022-11-16 16:31:49,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:49,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:31:49,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:31:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:31:49,555 INFO L87 Difference]: Start difference. First operand 863 states and 3140 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) [2022-11-16 16:31:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:50,212 INFO L93 Difference]: Finished difference Result 1356 states and 4953 transitions. [2022-11-16 16:31:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:31:50,213 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 [2022-11-16 16:31:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:50,220 INFO L225 Difference]: With dead ends: 1356 [2022-11-16 16:31:50,220 INFO L226 Difference]: Without dead ends: 1356 [2022-11-16 16:31:50,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-16 16:31:50,221 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:50,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 7 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:31:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-11-16 16:31:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 978. [2022-11-16 16:31:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 875 states have (on average 4.332571428571429) internal successors, (3791), 977 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3791 transitions. [2022-11-16 16:31:50,260 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3791 transitions. Word has length 6 [2022-11-16 16:31:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:50,260 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 3791 transitions. [2022-11-16 16:31:50,260 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) [2022-11-16 16:31:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3791 transitions. [2022-11-16 16:31:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:31:50,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:50,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:50,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:50,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:50,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:50,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1797462721, now seen corresponding path program 1 times [2022-11-16 16:31:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:50,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836688963] [2022-11-16 16:31:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:50,875 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 [2022-11-16 16:31:50,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:50,876 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:50,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (20)] Waiting until timeout for monitored process [2022-11-16 16:31:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:31:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:51,061 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:31:51,061 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 16:31:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:51,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:51,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836688963] [2022-11-16 16:31:51,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836688963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:51,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:51,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:31:51,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054558358] [2022-11-16 16:31:51,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:51,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:51,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:51,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:51,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:51,231 INFO L87 Difference]: Start difference. First operand 978 states and 3791 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:51,415 INFO L93 Difference]: Finished difference Result 979 states and 3793 transitions. [2022-11-16 16:31:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-16 16:31:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:51,420 INFO L225 Difference]: With dead ends: 979 [2022-11-16 16:31:51,421 INFO L226 Difference]: Without dead ends: 979 [2022-11-16 16:31:51,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:51,422 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:51,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-16 16:31:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-11-16 16:31:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 979. [2022-11-16 16:31:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 876 states have (on average 4.329908675799087) internal successors, (3793), 978 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3793 transitions. [2022-11-16 16:31:51,477 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3793 transitions. Word has length 7 [2022-11-16 16:31:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:51,477 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 3793 transitions. [2022-11-16 16:31:51,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3793 transitions. [2022-11-16 16:31:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:31:51,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:51,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:51,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (20)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:51,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:51,691 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1797462720, now seen corresponding path program 1 times [2022-11-16 16:31:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:51,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328182271] [2022-11-16 16:31:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:51,693 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 [2022-11-16 16:31:51,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:51,694 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:51,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:51,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:51,973 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 16:31:51,973 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 16:31:51,989 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 [2022-11-16 16:31:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:52,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:52,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:52,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328182271] [2022-11-16 16:31:52,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328182271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:52,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419169054] [2022-11-16 16:31:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:52,594 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:52,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:52,595 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:52,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-16 16:31:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:52,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:31:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:52,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:52,942 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 16:31:52,942 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 16:31:52,959 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 [2022-11-16 16:31:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:53,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:53,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419169054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:53,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:53,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:53,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527112744] [2022-11-16 16:31:53,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:53,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:53,100 INFO L87 Difference]: Start difference. First operand 979 states and 3793 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:53,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:53,298 INFO L93 Difference]: Finished difference Result 979 states and 3792 transitions. [2022-11-16 16:31:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:53,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-16 16:31:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:53,302 INFO L225 Difference]: With dead ends: 979 [2022-11-16 16:31:53,302 INFO L226 Difference]: Without dead ends: 979 [2022-11-16 16:31:53,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:53,303 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:53,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-16 16:31:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-11-16 16:31:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 979. [2022-11-16 16:31:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 876 states have (on average 4.328767123287672) internal successors, (3792), 978 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3792 transitions. [2022-11-16 16:31:53,337 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3792 transitions. Word has length 7 [2022-11-16 16:31:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:53,337 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 3792 transitions. [2022-11-16 16:31:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3792 transitions. [2022-11-16 16:31:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:31:53,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:53,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:53,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:53,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:53,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:53,742 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1797463062, now seen corresponding path program 1 times [2022-11-16 16:31:53,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:53,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282793864] [2022-11-16 16:31:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:53,743 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 [2022-11-16 16:31:53,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:53,744 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:53,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:53,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:31:53,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:53,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:54,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:54,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282793864] [2022-11-16 16:31:54,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282793864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:54,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1370909830] [2022-11-16 16:31:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:54,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:54,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:54,143 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:54,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-16 16:31:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:31:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:54,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:54,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1370909830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627983303] [2022-11-16 16:31:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:54,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:54,481 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:54,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 16:31:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:31:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:54,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:54,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627983303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:54,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:31:54,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2022-11-16 16:31:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864232825] [2022-11-16 16:31:54,687 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:31:54,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:31:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:31:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:31:54,688 INFO L87 Difference]: Start difference. First operand 979 states and 3792 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:56,305 INFO L93 Difference]: Finished difference Result 1470 states and 5374 transitions. [2022-11-16 16:31:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:31:56,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:31:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:56,310 INFO L225 Difference]: With dead ends: 1470 [2022-11-16 16:31:56,310 INFO L226 Difference]: Without dead ends: 1470 [2022-11-16 16:31:56,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:31:56,311 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 277 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:56,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 34 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 16:31:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-11-16 16:31:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1212. [2022-11-16 16:31:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1109 states have (on average 4.186654643823264) internal successors, (4643), 1211 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 4643 transitions. [2022-11-16 16:31:56,351 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 4643 transitions. Word has length 7 [2022-11-16 16:31:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:56,351 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 4643 transitions. [2022-11-16 16:31:56,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 4643 transitions. [2022-11-16 16:31:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:31:56,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:56,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:56,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:31:56,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:56,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 16:31:56,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:56,965 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:56,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1797242476, now seen corresponding path program 1 times [2022-11-16 16:31:56,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:56,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878231243] [2022-11-16 16:31:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:56,966 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 [2022-11-16 16:31:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:56,968 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:56,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (26)] Waiting until timeout for monitored process [2022-11-16 16:31:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:57,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:31:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:57,178 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:31:57,178 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 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-16 16:31:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:57,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:57,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878231243] [2022-11-16 16:31:57,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878231243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:57,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:57,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:31:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608989994] [2022-11-16 16:31:57,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:57,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:57,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:57,210 INFO L87 Difference]: Start difference. First operand 1212 states and 4643 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:57,423 INFO L93 Difference]: Finished difference Result 1153 states and 4444 transitions. [2022-11-16 16:31:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-16 16:31:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:57,427 INFO L225 Difference]: With dead ends: 1153 [2022-11-16 16:31:57,427 INFO L226 Difference]: Without dead ends: 1153 [2022-11-16 16:31:57,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:57,428 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:57,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:31:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-11-16 16:31:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1153. [2022-11-16 16:31:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1062 states have (on average 4.184557438794727) internal successors, (4444), 1152 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 4444 transitions. [2022-11-16 16:31:57,465 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 4444 transitions. Word has length 7 [2022-11-16 16:31:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:57,466 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 4444 transitions. [2022-11-16 16:31:57,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 4444 transitions. [2022-11-16 16:31:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:31:57,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:57,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:57,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (26)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:57,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:57,681 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1797242475, now seen corresponding path program 1 times [2022-11-16 16:31:57,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:57,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060842051] [2022-11-16 16:31:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:57,682 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 [2022-11-16 16:31:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:57,683 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:57,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:31:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:57,996 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:31:57,997 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:31:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:58,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:58,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060842051] [2022-11-16 16:31:58,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060842051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2020639697] [2022-11-16 16:31:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:58,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:58,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:58,583 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:58,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-16 16:31:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:58,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:58,966 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 16:31:58,966 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 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-16 16:31:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:59,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:59,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2020639697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:59,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:59,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:59,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280910295] [2022-11-16 16:31:59,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:59,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:59,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:59,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:59,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:59,085 INFO L87 Difference]: Start difference. First operand 1153 states and 4444 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:59,236 INFO L93 Difference]: Finished difference Result 1153 states and 4460 transitions. [2022-11-16 16:31:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-16 16:31:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:59,240 INFO L225 Difference]: With dead ends: 1153 [2022-11-16 16:31:59,240 INFO L226 Difference]: Without dead ends: 1153 [2022-11-16 16:31:59,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:59,241 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:59,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-16 16:31:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-11-16 16:31:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1153. [2022-11-16 16:31:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1062 states have (on average 4.199623352165725) internal successors, (4460), 1152 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 4460 transitions. [2022-11-16 16:31:59,277 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 4460 transitions. Word has length 7 [2022-11-16 16:31:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:59,277 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 4460 transitions. [2022-11-16 16:31:59,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:31:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 4460 transitions. [2022-11-16 16:31:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:31:59,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:59,279 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:59,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:59,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:31:59,682 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:31:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1647900950, now seen corresponding path program 2 times [2022-11-16 16:31:59,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:59,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255577325] [2022-11-16 16:31:59,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:31:59,684 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 [2022-11-16 16:31:59,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:59,685 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:31:59,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:31:59,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:31:59,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:31:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:59,924 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:31:59,924 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 16:32:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:00,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:00,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255577325] [2022-11-16 16:32:00,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255577325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:00,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:32:00,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:32:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119156644] [2022-11-16 16:32:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:32:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:32:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:32:00,215 INFO L87 Difference]: Start difference. First operand 1153 states and 4460 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-16 16:32:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:00,384 INFO L93 Difference]: Finished difference Result 1154 states and 4463 transitions. [2022-11-16 16:32:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:32:00,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 8 [2022-11-16 16:32:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:00,389 INFO L225 Difference]: With dead ends: 1154 [2022-11-16 16:32:00,389 INFO L226 Difference]: Without dead ends: 1154 [2022-11-16 16:32:00,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:32:00,391 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:00,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 16:32:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-11-16 16:32:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1154. [2022-11-16 16:32:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1063 states have (on average 4.198494825964252) internal successors, (4463), 1153 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 4463 transitions. [2022-11-16 16:32:00,422 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 4463 transitions. Word has length 8 [2022-11-16 16:32:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:00,423 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 4463 transitions. [2022-11-16 16:32:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-16 16:32:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 4463 transitions. [2022-11-16 16:32:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:32:00,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:00,424 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:00,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:32:00,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:00,631 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1647900949, now seen corresponding path program 1 times [2022-11-16 16:32:00,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:00,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680352655] [2022-11-16 16:32:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:00,632 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 [2022-11-16 16:32:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:00,633 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:00,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:32:00,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:00,929 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 16:32:00,929 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 16:32:00,955 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 14 treesize of output 12 [2022-11-16 16:32:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:01,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:01,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680352655] [2022-11-16 16:32:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680352655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [332163019] [2022-11-16 16:32:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:01,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:01,966 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:01,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-16 16:32:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:32:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:02,393 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 16:32:02,394 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 16:32:02,411 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 [2022-11-16 16:32:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:02,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:02,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [332163019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:02,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:32:02,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:32:02,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758195427] [2022-11-16 16:32:02,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:02,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:32:02,584 INFO L87 Difference]: Start difference. First operand 1154 states and 4463 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:32:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:02,753 INFO L93 Difference]: Finished difference Result 1154 states and 4462 transitions. [2022-11-16 16:32:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 8 [2022-11-16 16:32:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:02,759 INFO L225 Difference]: With dead ends: 1154 [2022-11-16 16:32:02,759 INFO L226 Difference]: Without dead ends: 1154 [2022-11-16 16:32:02,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:32:02,760 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:02,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 16:32:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-11-16 16:32:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1154. [2022-11-16 16:32:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1063 states have (on average 4.1975540921919094) internal successors, (4462), 1153 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 4462 transitions. [2022-11-16 16:32:02,831 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 4462 transitions. Word has length 8 [2022-11-16 16:32:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:02,832 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 4462 transitions. [2022-11-16 16:32:02,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-16 16:32:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 4462 transitions. [2022-11-16 16:32:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:32:02,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:02,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:02,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:03,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:03,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:03,245 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:03,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1647898772, now seen corresponding path program 1 times [2022-11-16 16:32:03,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:03,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070398006] [2022-11-16 16:32:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:03,247 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 [2022-11-16 16:32:03,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:03,247 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:03,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:32:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:32:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:03,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:03,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070398006] [2022-11-16 16:32:03,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070398006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:03,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:32:03,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:32:03,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819506765] [2022-11-16 16:32:03,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:03,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:03,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:03,382 INFO L87 Difference]: Start difference. First operand 1154 states and 4462 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-16 16:32:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:03,736 INFO L93 Difference]: Finished difference Result 1509 states and 5463 transitions. [2022-11-16 16:32:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:03,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 8 [2022-11-16 16:32:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:03,742 INFO L225 Difference]: With dead ends: 1509 [2022-11-16 16:32:03,742 INFO L226 Difference]: Without dead ends: 1509 [2022-11-16 16:32:03,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:03,743 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:03,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 5 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:32:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-11-16 16:32:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1154. [2022-11-16 16:32:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1063 states have (on average 4.094073377234243) internal successors, (4352), 1153 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 4352 transitions. [2022-11-16 16:32:03,782 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 4352 transitions. Word has length 8 [2022-11-16 16:32:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:03,782 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 4352 transitions. [2022-11-16 16:32:03,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-16 16:32:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 4352 transitions. [2022-11-16 16:32:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:32:03,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:03,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:03,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:32:03,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:03,995 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash 120051573, now seen corresponding path program 1 times [2022-11-16 16:32:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:03,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500970631] [2022-11-16 16:32:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:03,995 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 [2022-11-16 16:32:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:03,996 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:03,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (33)] Waiting until timeout for monitored process [2022-11-16 16:32:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:04,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:32:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:04,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:04,405 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 [2022-11-16 16:32:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:04,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:04,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500970631] [2022-11-16 16:32:04,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500970631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:04,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [287738464] [2022-11-16 16:32:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:04,478 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:04,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-16 16:32:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:32:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:04,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:05,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [287738464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:05,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21079908] [2022-11-16 16:32:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:05,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:32:05,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:32:05,208 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:32:05,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 16:32:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:32:05,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:05,478 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:32:05,478 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:32:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:05,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:06,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21079908] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 16:32:06,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-16 16:32:06,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4, 4] total 21 [2022-11-16 16:32:06,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794367920] [2022-11-16 16:32:06,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:32:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:32:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-16 16:32:06,104 INFO L87 Difference]: Start difference. First operand 1154 states and 4352 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 16:32:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:07,884 INFO L93 Difference]: Finished difference Result 1535 states and 6088 transitions. [2022-11-16 16:32:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:32:07,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2022-11-16 16:32:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:07,889 INFO L225 Difference]: With dead ends: 1535 [2022-11-16 16:32:07,890 INFO L226 Difference]: Without dead ends: 1535 [2022-11-16 16:32:07,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-11-16 16:32:07,890 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 171 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:07,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 7 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 16:32:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-11-16 16:32:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1336. [2022-11-16 16:32:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1245 states have (on average 4.470682730923695) internal successors, (5566), 1335 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 5566 transitions. [2022-11-16 16:32:07,929 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 5566 transitions. Word has length 8 [2022-11-16 16:32:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:07,930 INFO L495 AbstractCegarLoop]: Abstraction has 1336 states and 5566 transitions. [2022-11-16 16:32:07,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 16:32:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 5566 transitions. [2022-11-16 16:32:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:32:07,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:07,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:07,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (33)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:08,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-16 16:32:08,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-16 16:32:08,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:08,543 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash 120051592, now seen corresponding path program 1 times [2022-11-16 16:32:08,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:08,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944010208] [2022-11-16 16:32:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:08,544 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 [2022-11-16 16:32:08,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:08,545 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:08,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:32:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:32:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:08,841 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:32:08,841 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:32:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:09,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:09,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:09,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944010208] [2022-11-16 16:32:09,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944010208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:09,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:32:09,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:32:09,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327186224] [2022-11-16 16:32:09,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:09,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:32:09,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:32:09,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:32:09,033 INFO L87 Difference]: Start difference. First operand 1336 states and 5566 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) [2022-11-16 16:32:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:09,285 INFO L93 Difference]: Finished difference Result 1336 states and 5562 transitions. [2022-11-16 16:32:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:32:09,286 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 [2022-11-16 16:32:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:09,290 INFO L225 Difference]: With dead ends: 1336 [2022-11-16 16:32:09,290 INFO L226 Difference]: Without dead ends: 1336 [2022-11-16 16:32:09,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:32:09,291 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:09,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-11-16 16:32:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-11-16 16:32:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1336. [2022-11-16 16:32:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1245 states have (on average 4.467469879518072) internal successors, (5562), 1335 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 5562 transitions. [2022-11-16 16:32:09,325 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 5562 transitions. Word has length 8 [2022-11-16 16:32:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:09,325 INFO L495 AbstractCegarLoop]: Abstraction has 1336 states and 5562 transitions. [2022-11-16 16:32:09,326 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) [2022-11-16 16:32:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 5562 transitions. [2022-11-16 16:32:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:09,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:09,327 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:09,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:32:09,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:09,538 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 454680347, now seen corresponding path program 1 times [2022-11-16 16:32:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:09,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236684155] [2022-11-16 16:32:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:09,539 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 [2022-11-16 16:32:09,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:09,540 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:09,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:09,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:32:09,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:09,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:09,828 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 [2022-11-16 16:32:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:09,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:09,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236684155] [2022-11-16 16:32:09,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236684155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:09,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1024011793] [2022-11-16 16:32:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:09,977 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:09,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:09,978 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:09,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-16 16:32:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:10,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:32:10,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:10,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:11,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1024011793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:11,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055879735] [2022-11-16 16:32:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:11,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:32:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:32:11,059 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:32:11,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 16:32:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:32:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:11,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:11,284 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 [2022-11-16 16:32:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:11,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055879735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:11,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:32:11,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 6, 4, 4] total 20 [2022-11-16 16:32:11,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313273424] [2022-11-16 16:32:11,330 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:32:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 16:32:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 16:32:11,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-11-16 16:32:11,331 INFO L87 Difference]: Start difference. First operand 1336 states and 5562 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2022-11-16 16:32:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:22,871 INFO L93 Difference]: Finished difference Result 5989 states and 23915 transitions. [2022-11-16 16:32:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 16:32:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 9 [2022-11-16 16:32:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:22,892 INFO L225 Difference]: With dead ends: 5989 [2022-11-16 16:32:22,892 INFO L226 Difference]: Without dead ends: 5989 [2022-11-16 16:32:22,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=571, Invalid=1879, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 16:32:22,893 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1495 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:22,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1495 Valid, 190 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-16 16:32:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5989 states. [2022-11-16 16:32:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5989 to 1857. [2022-11-16 16:32:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1766 states have (on average 4.570215175537939) internal successors, (8071), 1856 states have internal predecessors, (8071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 8071 transitions. [2022-11-16 16:32:23,007 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 8071 transitions. Word has length 9 [2022-11-16 16:32:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:23,007 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 8071 transitions. [2022-11-16 16:32:23,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2022-11-16 16:32:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 8071 transitions. [2022-11-16 16:32:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:23,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:23,008 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:23,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:23,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:23,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-16 16:32:23,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:23,615 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 454680370, now seen corresponding path program 1 times [2022-11-16 16:32:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:23,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407351022] [2022-11-16 16:32:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:23,616 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 [2022-11-16 16:32:23,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:23,617 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:23,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:32:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:23,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:32:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:23,897 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:32:23,898 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 16:32:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:24,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:24,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:24,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407351022] [2022-11-16 16:32:24,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407351022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:24,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:32:24,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:32:24,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89706295] [2022-11-16 16:32:24,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:24,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:24,112 INFO L87 Difference]: Start difference. First operand 1857 states and 8071 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-16 16:32:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:24,255 INFO L93 Difference]: Finished difference Result 1858 states and 8078 transitions. [2022-11-16 16:32:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 9 [2022-11-16 16:32:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:24,263 INFO L225 Difference]: With dead ends: 1858 [2022-11-16 16:32:24,263 INFO L226 Difference]: Without dead ends: 1858 [2022-11-16 16:32:24,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:24,264 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:24,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-16 16:32:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-11-16 16:32:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1858. [2022-11-16 16:32:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1767 states have (on average 4.57159026598755) internal successors, (8078), 1857 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 8078 transitions. [2022-11-16 16:32:24,315 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 8078 transitions. Word has length 9 [2022-11-16 16:32:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:24,315 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 8078 transitions. [2022-11-16 16:32:24,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-16 16:32:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 8078 transitions. [2022-11-16 16:32:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:24,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:24,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:24,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:32:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:24,517 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash 454680371, now seen corresponding path program 1 times [2022-11-16 16:32:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:24,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772093160] [2022-11-16 16:32:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:24,518 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 [2022-11-16 16:32:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:24,518 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:24,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:24,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:32:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:24,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:24,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:24,816 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 16:32:24,816 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 16:32:24,831 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 14 treesize of output 12 [2022-11-16 16:32:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:25,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:25,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:25,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772093160] [2022-11-16 16:32:25,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772093160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:25,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574534268] [2022-11-16 16:32:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:25,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:25,845 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:25,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-16 16:32:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:26,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:32:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:26,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:26,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:26,340 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 16:32:26,341 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 16:32:26,358 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 [2022-11-16 16:32:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:32:26,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:26,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574534268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:26,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:32:26,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:32:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461605456] [2022-11-16 16:32:26,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:26,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:26,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:32:26,551 INFO L87 Difference]: Start difference. First operand 1858 states and 8078 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-16 16:32:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:26,694 INFO L93 Difference]: Finished difference Result 1857 states and 8074 transitions. [2022-11-16 16:32:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:26,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 9 [2022-11-16 16:32:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:26,702 INFO L225 Difference]: With dead ends: 1857 [2022-11-16 16:32:26,702 INFO L226 Difference]: Without dead ends: 1857 [2022-11-16 16:32:26,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:32:26,703 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:26,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-16 16:32:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-16 16:32:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1856. [2022-11-16 16:32:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1765 states have (on average 4.573371104815864) internal successors, (8072), 1855 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 8072 transitions. [2022-11-16 16:32:26,749 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 8072 transitions. Word has length 9 [2022-11-16 16:32:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:26,749 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 8072 transitions. [2022-11-16 16:32:26,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-16 16:32:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 8072 transitions. [2022-11-16 16:32:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:26,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:26,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:26,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:32:26,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-16 16:32:27,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:27,150 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash -784804843, now seen corresponding path program 1 times [2022-11-16 16:32:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:27,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395948142] [2022-11-16 16:32:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:27,151 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 [2022-11-16 16:32:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:27,153 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:27,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:32:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:32:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:27,445 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:32:27,445 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:32:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:27,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:28,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395948142] [2022-11-16 16:32:28,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395948142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:28,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1507708653] [2022-11-16 16:32:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:28,044 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:28,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:28,045 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:28,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-16 16:32:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:32:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:28,428 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 16:32:28,429 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 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-16 16:32:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:28,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:28,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1507708653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:28,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:32:28,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:32:28,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407044992] [2022-11-16 16:32:28,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:28,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:28,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:32:28,565 INFO L87 Difference]: Start difference. First operand 1856 states and 8072 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:28,722 INFO L93 Difference]: Finished difference Result 1859 states and 8080 transitions. [2022-11-16 16:32:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2022-11-16 16:32:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:28,729 INFO L225 Difference]: With dead ends: 1859 [2022-11-16 16:32:28,729 INFO L226 Difference]: Without dead ends: 1859 [2022-11-16 16:32:28,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:32:28,730 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:28,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-16 16:32:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2022-11-16 16:32:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1859. [2022-11-16 16:32:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1768 states have (on average 4.570135746606335) internal successors, (8080), 1858 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 8080 transitions. [2022-11-16 16:32:28,813 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 8080 transitions. Word has length 9 [2022-11-16 16:32:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:28,813 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 8080 transitions. [2022-11-16 16:32:28,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 8080 transitions. [2022-11-16 16:32:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:28,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:28,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:28,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:29,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:29,218 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash -573148113, now seen corresponding path program 1 times [2022-11-16 16:32:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362555746] [2022-11-16 16:32:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:29,219 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 [2022-11-16 16:32:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:29,220 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:29,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (45)] Waiting until timeout for monitored process [2022-11-16 16:32:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:32:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:29,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:32:29,513 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:32:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:29,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:29,707 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362555746] [2022-11-16 16:32:29,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362555746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:29,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:32:29,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:32:29,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605031123] [2022-11-16 16:32:29,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:29,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:32:29,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:32:29,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:32:29,709 INFO L87 Difference]: Start difference. First operand 1859 states and 8080 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-16 16:32:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:29,947 INFO L93 Difference]: Finished difference Result 1872 states and 8151 transitions. [2022-11-16 16:32:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:32:29,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2022-11-16 16:32:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:29,953 INFO L225 Difference]: With dead ends: 1872 [2022-11-16 16:32:29,953 INFO L226 Difference]: Without dead ends: 1872 [2022-11-16 16:32:29,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:32:29,954 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:29,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-16 16:32:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-11-16 16:32:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1866. [2022-11-16 16:32:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1775 states have (on average 4.571267605633802) internal successors, (8114), 1865 states have internal predecessors, (8114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 8114 transitions. [2022-11-16 16:32:30,027 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 8114 transitions. Word has length 9 [2022-11-16 16:32:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:30,028 INFO L495 AbstractCegarLoop]: Abstraction has 1866 states and 8114 transitions. [2022-11-16 16:32:30,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-16 16:32:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 8114 transitions. [2022-11-16 16:32:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:30,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:30,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:30,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (45)] Ended with exit code 0 [2022-11-16 16:32:30,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:30,240 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash -573146618, now seen corresponding path program 1 times [2022-11-16 16:32:30,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:30,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416699216] [2022-11-16 16:32:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:30,242 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 [2022-11-16 16:32:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:30,243 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:30,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:32:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:32:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:30,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:30,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:30,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416699216] [2022-11-16 16:32:30,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416699216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:30,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:32:30,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:32:30,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776099858] [2022-11-16 16:32:30,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:30,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:30,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:30,422 INFO L87 Difference]: Start difference. First operand 1866 states and 8114 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-11-16 16:32:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:30,660 INFO L93 Difference]: Finished difference Result 1411 states and 5859 transitions. [2022-11-16 16:32:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:30,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2022-11-16 16:32:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:30,664 INFO L225 Difference]: With dead ends: 1411 [2022-11-16 16:32:30,665 INFO L226 Difference]: Without dead ends: 1411 [2022-11-16 16:32:30,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:30,665 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:30,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:32:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-11-16 16:32:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1411. [2022-11-16 16:32:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1347 states have (on average 4.349665924276169) internal successors, (5859), 1410 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 5859 transitions. [2022-11-16 16:32:30,713 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 5859 transitions. Word has length 9 [2022-11-16 16:32:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:30,713 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 5859 transitions. [2022-11-16 16:32:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-11-16 16:32:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 5859 transitions. [2022-11-16 16:32:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:30,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:30,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:30,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:30,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:30,915 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -573367731, now seen corresponding path program 1 times [2022-11-16 16:32:30,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:30,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070185571] [2022-11-16 16:32:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:30,915 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 [2022-11-16 16:32:30,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:30,916 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:30,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:31,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:32:31,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:31,222 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:32:31,223 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:32:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:31,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:31,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070185571] [2022-11-16 16:32:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070185571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377458050] [2022-11-16 16:32:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:31,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:31,811 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:31,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-16 16:32:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:32:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:32,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:32,242 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 16:32:32,243 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 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-16 16:32:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:32,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:32,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [377458050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:32,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:32:32,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:32:32,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247108583] [2022-11-16 16:32:32,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:32:32,378 INFO L87 Difference]: Start difference. First operand 1411 states and 5859 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:32,531 INFO L93 Difference]: Finished difference Result 1417 states and 5872 transitions. [2022-11-16 16:32:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2022-11-16 16:32:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:32,536 INFO L225 Difference]: With dead ends: 1417 [2022-11-16 16:32:32,536 INFO L226 Difference]: Without dead ends: 1417 [2022-11-16 16:32:32,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:32:32,537 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:32,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-16 16:32:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2022-11-16 16:32:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1417. [2022-11-16 16:32:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1353 states have (on average 4.339985218033998) internal successors, (5872), 1416 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 5872 transitions. [2022-11-16 16:32:32,584 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 5872 transitions. Word has length 9 [2022-11-16 16:32:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:32,585 INFO L495 AbstractCegarLoop]: Abstraction has 1417 states and 5872 transitions. [2022-11-16 16:32:32,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 5872 transitions. [2022-11-16 16:32:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:32:32,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:32,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:32,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:32,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:32,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:32,986 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash -573367173, now seen corresponding path program 1 times [2022-11-16 16:32:32,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543022445] [2022-11-16 16:32:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:32,987 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 [2022-11-16 16:32:32,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:32,988 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:32,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (49)] Waiting until timeout for monitored process [2022-11-16 16:32:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:33,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:32:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:33,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:33,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:33,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543022445] [2022-11-16 16:32:33,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543022445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:33,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945731306] [2022-11-16 16:32:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:33,444 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:33,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:33,445 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:33,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-16 16:32:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:32:33,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:33,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:33,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945731306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790489361] [2022-11-16 16:32:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:32:33,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:32:33,900 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:32:33,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-16 16:32:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:32:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:34,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790489361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:34,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:32:34,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5, 5] total 12 [2022-11-16 16:32:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768543449] [2022-11-16 16:32:34,169 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:32:34,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 16:32:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 16:32:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:32:34,170 INFO L87 Difference]: Start difference. First operand 1417 states and 5872 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:34,938 INFO L93 Difference]: Finished difference Result 1509 states and 5983 transitions. [2022-11-16 16:32:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:32:34,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2022-11-16 16:32:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:34,945 INFO L225 Difference]: With dead ends: 1509 [2022-11-16 16:32:34,945 INFO L226 Difference]: Without dead ends: 1509 [2022-11-16 16:32:34,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:32:34,946 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:34,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 18 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 65 Unchecked, 0.7s Time] [2022-11-16 16:32:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-11-16 16:32:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1446. [2022-11-16 16:32:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1382 states have (on average 4.240231548480463) internal successors, (5860), 1445 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 5860 transitions. [2022-11-16 16:32:35,002 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 5860 transitions. Word has length 9 [2022-11-16 16:32:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:35,003 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 5860 transitions. [2022-11-16 16:32:35,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 5860 transitions. [2022-11-16 16:32:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:32:35,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:35,004 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:35,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (49)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:35,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:35,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-16 16:32:35,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:35,618 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1845018029, now seen corresponding path program 1 times [2022-11-16 16:32:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:35,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815979247] [2022-11-16 16:32:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:35,620 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 [2022-11-16 16:32:35,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:35,620 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:35,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:32:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:32:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:35,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:36,488 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 35 treesize of output 29 [2022-11-16 16:32:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:36,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815979247] [2022-11-16 16:32:36,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815979247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555162883] [2022-11-16 16:32:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:36,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:36,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:36,903 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:36,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-16 16:32:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:32:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:37,417 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:32:37,418 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:32:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:37,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:39,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555162883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:39,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145686745] [2022-11-16 16:32:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:39,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:32:39,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:32:39,280 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:32:39,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-16 16:32:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:32:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:39,615 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:32:39,615 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:32:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:32:40,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:32:41,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145686745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:41,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:32:41,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 4, 4] total 35 [2022-11-16 16:32:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068303199] [2022-11-16 16:32:41,590 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:32:41,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 16:32:41,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 16:32:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:32:41,593 INFO L87 Difference]: Start difference. First operand 1446 states and 5860 transitions. Second operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:54,492 INFO L93 Difference]: Finished difference Result 2302 states and 8801 transitions. [2022-11-16 16:32:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 16:32:54,494 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2022-11-16 16:32:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:54,501 INFO L225 Difference]: With dead ends: 2302 [2022-11-16 16:32:54,502 INFO L226 Difference]: Without dead ends: 2302 [2022-11-16 16:32:54,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 16:32:54,503 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 801 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:54,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 243 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2310 Invalid, 0 Unknown, 52 Unchecked, 9.5s Time] [2022-11-16 16:32:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2022-11-16 16:32:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1641. [2022-11-16 16:32:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1577 states have (on average 4.310716550412175) internal successors, (6798), 1640 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 6798 transitions. [2022-11-16 16:32:54,562 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 6798 transitions. Word has length 10 [2022-11-16 16:32:54,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:54,562 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 6798 transitions. [2022-11-16 16:32:54,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 6798 transitions. [2022-11-16 16:32:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:32:54,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:54,563 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:54,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-16 16:32:54,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:32:54,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:55,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:55,164 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1210189959, now seen corresponding path program 1 times [2022-11-16 16:32:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:55,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522863064] [2022-11-16 16:32:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:55,165 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 [2022-11-16 16:32:55,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:55,166 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:55,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (55)] Waiting until timeout for monitored process [2022-11-16 16:32:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:55,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:32:55,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:55,424 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:32:55,425 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 16:32:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:32:55,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:55,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:55,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522863064] [2022-11-16 16:32:55,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522863064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:55,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:32:55,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:32:55,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684059951] [2022-11-16 16:32:55,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:55,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:55,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:55,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:55,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:55,645 INFO L87 Difference]: Start difference. First operand 1641 states and 6798 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:55,814 INFO L93 Difference]: Finished difference Result 1643 states and 6802 transitions. [2022-11-16 16:32:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:55,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-11-16 16:32:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:55,820 INFO L225 Difference]: With dead ends: 1643 [2022-11-16 16:32:55,820 INFO L226 Difference]: Without dead ends: 1643 [2022-11-16 16:32:55,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:32:55,821 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:55,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 16:32:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-11-16 16:32:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1643. [2022-11-16 16:32:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1579 states have (on average 4.307789740341988) internal successors, (6802), 1642 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 6802 transitions. [2022-11-16 16:32:55,896 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 6802 transitions. Word has length 10 [2022-11-16 16:32:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:55,897 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 6802 transitions. [2022-11-16 16:32:55,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 6802 transitions. [2022-11-16 16:32:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:32:55,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:55,898 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:55,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (55)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:56,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:56,112 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:32:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:56,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1210189960, now seen corresponding path program 1 times [2022-11-16 16:32:56,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:56,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780267252] [2022-11-16 16:32:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:56,114 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 [2022-11-16 16:32:56,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:56,115 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:32:56,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:32:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:32:56,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:56,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:56,520 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 16:32:56,521 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 16:32:56,551 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 42 treesize of output 38 [2022-11-16 16:32:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:57,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:58,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780267252] [2022-11-16 16:32:58,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780267252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [202993684] [2022-11-16 16:32:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:32:58,893 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:58,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:58,894 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:58,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-16 16:32:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:32:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:59,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:59,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:59,442 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 16:32:59,443 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 16:32:59,460 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 39 treesize of output 37 [2022-11-16 16:32:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:32:59,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:59,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [202993684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:59,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:32:59,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7, 8] total 16 [2022-11-16 16:32:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367790830] [2022-11-16 16:32:59,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:59,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:32:59,643 INFO L87 Difference]: Start difference. First operand 1643 states and 6802 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:59,831 INFO L93 Difference]: Finished difference Result 1643 states and 6800 transitions. [2022-11-16 16:32:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-11-16 16:32:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:59,840 INFO L225 Difference]: With dead ends: 1643 [2022-11-16 16:32:59,840 INFO L226 Difference]: Without dead ends: 1643 [2022-11-16 16:32:59,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:32:59,841 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:59,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 16:32:59,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-11-16 16:32:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1643. [2022-11-16 16:32:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1579 states have (on average 4.306523115896137) internal successors, (6800), 1642 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 6800 transitions. [2022-11-16 16:32:59,900 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 6800 transitions. Word has length 10 [2022-11-16 16:32:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:59,900 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 6800 transitions. [2022-11-16 16:32:59,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:32:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 6800 transitions. [2022-11-16 16:32:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:32:59,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:59,901 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:59,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:33:00,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-16 16:33:00,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:33:00,302 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1210136320, now seen corresponding path program 1 times [2022-11-16 16:33:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:00,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194782135] [2022-11-16 16:33:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:00,303 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 [2022-11-16 16:33:00,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:00,304 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:00,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:33:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:33:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:33:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:33:00,690 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 16:33:00,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 16:33:00,698 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 18 treesize of output 16 [2022-11-16 16:33:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:33:00,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:33:00,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194782135] [2022-11-16 16:33:00,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194782135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:33:00,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:33:00,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:33:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267971620] [2022-11-16 16:33:00,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:33:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:33:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:33:00,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:00,758 INFO L87 Difference]: Start difference. First operand 1643 states and 6800 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:33:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:00,984 INFO L93 Difference]: Finished difference Result 1544 states and 6404 transitions. [2022-11-16 16:33:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:33:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-11-16 16:33:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:00,991 INFO L225 Difference]: With dead ends: 1544 [2022-11-16 16:33:00,991 INFO L226 Difference]: Without dead ends: 1544 [2022-11-16 16:33:00,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:00,991 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:00,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:33:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-11-16 16:33:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1535. [2022-11-16 16:33:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1483 states have (on average 4.304787592717465) internal successors, (6384), 1534 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6384 transitions. [2022-11-16 16:33:01,050 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6384 transitions. Word has length 10 [2022-11-16 16:33:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:01,050 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 6384 transitions. [2022-11-16 16:33:01,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:33:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6384 transitions. [2022-11-16 16:33:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:33:01,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:01,051 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:01,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:01,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:01,252 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1421902201, now seen corresponding path program 2 times [2022-11-16 16:33:01,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:01,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148745045] [2022-11-16 16:33:01,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:33:01,253 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 [2022-11-16 16:33:01,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:01,254 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:01,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:33:01,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:33:01,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:33:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:33:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:01,596 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:33:01,596 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:33:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:33:01,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:33:01,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:01,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148745045] [2022-11-16 16:33:01,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148745045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:33:01,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:33:01,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:33:01,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032507594] [2022-11-16 16:33:01,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:33:01,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:33:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:33:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:33:01,835 INFO L87 Difference]: Start difference. First operand 1535 states and 6384 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-16 16:33:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:02,140 INFO L93 Difference]: Finished difference Result 1541 states and 6411 transitions. [2022-11-16 16:33:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:33:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 10 [2022-11-16 16:33:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:02,147 INFO L225 Difference]: With dead ends: 1541 [2022-11-16 16:33:02,148 INFO L226 Difference]: Without dead ends: 1541 [2022-11-16 16:33:02,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:33:02,148 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:02,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-11-16 16:33:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-11-16 16:33:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1535. [2022-11-16 16:33:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1483 states have (on average 4.304787592717465) internal successors, (6384), 1534 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6384 transitions. [2022-11-16 16:33:02,193 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6384 transitions. Word has length 10 [2022-11-16 16:33:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:02,194 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 6384 transitions. [2022-11-16 16:33:02,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-16 16:33:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6384 transitions. [2022-11-16 16:33:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:33:02,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:02,195 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:02,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:33:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:02,396 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:02,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1421903267, now seen corresponding path program 1 times [2022-11-16 16:33:02,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:02,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147995870] [2022-11-16 16:33:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:02,397 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 [2022-11-16 16:33:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:02,398 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:02,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (60)] Waiting until timeout for monitored process [2022-11-16 16:33:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:02,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:33:02,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:33:02,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:33:02,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:02,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147995870] [2022-11-16 16:33:02,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147995870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:33:02,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:33:02,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:33:02,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536226896] [2022-11-16 16:33:02,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:33:02,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:33:02,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:33:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:02,619 INFO L87 Difference]: Start difference. First operand 1535 states and 6384 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-16 16:33:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:03,007 INFO L93 Difference]: Finished difference Result 2283 states and 9210 transitions. [2022-11-16 16:33:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:33:03,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 10 [2022-11-16 16:33:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:03,016 INFO L225 Difference]: With dead ends: 2283 [2022-11-16 16:33:03,016 INFO L226 Difference]: Without dead ends: 2283 [2022-11-16 16:33:03,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:03,017 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:03,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 5 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:33:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-11-16 16:33:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1715. [2022-11-16 16:33:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1663 states have (on average 4.46662657847264) internal successors, (7428), 1714 states have internal predecessors, (7428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 7428 transitions. [2022-11-16 16:33:03,108 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 7428 transitions. Word has length 10 [2022-11-16 16:33:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:03,109 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 7428 transitions. [2022-11-16 16:33:03,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-16 16:33:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 7428 transitions. [2022-11-16 16:33:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:33:03,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:03,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:03,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (60)] Forceful destruction successful, exit code 0 [2022-11-16 16:33:03,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:03,310 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash -587680497, now seen corresponding path program 1 times [2022-11-16 16:33:03,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:03,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284415612] [2022-11-16 16:33:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:03,311 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 [2022-11-16 16:33:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:03,312 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:03,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:03,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:33:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:03,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:03,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:03,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284415612] [2022-11-16 16:33:03,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284415612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:03,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [96305464] [2022-11-16 16:33:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:33:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:33:03,938 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:33:03,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-16 16:33:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:33:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:04,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:04,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [96305464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:04,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477871024] [2022-11-16 16:33:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:04,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:33:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:33:04,578 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:33:04,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-16 16:33:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:04,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:33:04,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:04,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477871024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:04,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:33:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-16 16:33:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116770442] [2022-11-16 16:33:04,990 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:33:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:33:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:33:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:33:04,991 INFO L87 Difference]: Start difference. First operand 1715 states and 7428 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-16 16:33:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:06,488 INFO L93 Difference]: Finished difference Result 1707 states and 7330 transitions. [2022-11-16 16:33:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:33:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 10 [2022-11-16 16:33:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:06,495 INFO L225 Difference]: With dead ends: 1707 [2022-11-16 16:33:06,495 INFO L226 Difference]: Without dead ends: 1707 [2022-11-16 16:33:06,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:33:06,496 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 128 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:06,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 30 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 16:33:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2022-11-16 16:33:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1695. [2022-11-16 16:33:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1643 states have (on average 4.454047474132684) internal successors, (7318), 1694 states have internal predecessors, (7318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 7318 transitions. [2022-11-16 16:33:06,553 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 7318 transitions. Word has length 10 [2022-11-16 16:33:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:06,555 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 7318 transitions. [2022-11-16 16:33:06,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-16 16:33:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 7318 transitions. [2022-11-16 16:33:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:33:06,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:06,557 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:06,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-16 16:33:06,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-16 16:33:06,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:33:07,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:07,161 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1360984354, now seen corresponding path program 1 times [2022-11-16 16:33:07,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:07,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762927122] [2022-11-16 16:33:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:07,162 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 [2022-11-16 16:33:07,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:07,163 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:07,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:07,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:33:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:07,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:08,280 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 35 treesize of output 29 [2022-11-16 16:33:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:08,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762927122] [2022-11-16 16:33:08,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762927122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097485864] [2022-11-16 16:33:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:08,733 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:33:08,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:33:08,735 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:33:08,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-16 16:33:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:09,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:33:09,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:09,320 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:33:09,321 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:33:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:10,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:11,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097485864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094248265] [2022-11-16 16:33:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:11,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:33:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:33:11,568 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:33:11,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-16 16:33:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:33:11,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:11,988 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:33:11,988 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:33:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:33:12,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:33:14,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094248265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:14,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:33:14,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 4, 4] total 35 [2022-11-16 16:33:14,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254739179] [2022-11-16 16:33:14,199 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:33:14,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 16:33:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 16:33:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:33:14,201 INFO L87 Difference]: Start difference. First operand 1695 states and 7318 transitions. Second operand has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:27,477 INFO L93 Difference]: Finished difference Result 2562 states and 11350 transitions. [2022-11-16 16:33:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 16:33:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-11-16 16:33:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:27,485 INFO L225 Difference]: With dead ends: 2562 [2022-11-16 16:33:27,485 INFO L226 Difference]: Without dead ends: 2562 [2022-11-16 16:33:27,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=593, Invalid=3313, Unknown=0, NotChecked=0, Total=3906 [2022-11-16 16:33:27,486 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 679 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:27,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 339 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2511 Invalid, 0 Unknown, 439 Unchecked, 10.1s Time] [2022-11-16 16:33:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-11-16 16:33:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1785. [2022-11-16 16:33:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1733 states have (on average 4.556260819388344) internal successors, (7896), 1784 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7896 transitions. [2022-11-16 16:33:27,524 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7896 transitions. Word has length 11 [2022-11-16 16:33:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:27,525 INFO L495 AbstractCegarLoop]: Abstraction has 1785 states and 7896 transitions. [2022-11-16 16:33:27,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7896 transitions. [2022-11-16 16:33:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:33:27,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:27,525 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:27,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:33:27,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-16 16:33:27,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-16 16:33:28,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:33:28,126 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:28,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1360982860, now seen corresponding path program 1 times [2022-11-16 16:33:28,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:28,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646837943] [2022-11-16 16:33:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:28,127 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 [2022-11-16 16:33:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:28,130 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:28,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Waiting until timeout for monitored process [2022-11-16 16:33:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:33:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:33:28,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:33:28,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:28,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646837943] [2022-11-16 16:33:28,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646837943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:33:28,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:33:28,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:33:28,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975272666] [2022-11-16 16:33:28,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:33:28,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:33:28,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:33:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:28,326 INFO L87 Difference]: Start difference. First operand 1785 states and 7896 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-11-16 16:33:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:28,672 INFO L93 Difference]: Finished difference Result 1945 states and 8191 transitions. [2022-11-16 16:33:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:33:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 11 [2022-11-16 16:33:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:28,677 INFO L225 Difference]: With dead ends: 1945 [2022-11-16 16:33:28,677 INFO L226 Difference]: Without dead ends: 1945 [2022-11-16 16:33:28,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:28,678 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:28,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 8 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:33:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-11-16 16:33:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1676. [2022-11-16 16:33:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1637 states have (on average 4.43738546120953) internal successors, (7264), 1675 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 7264 transitions. [2022-11-16 16:33:28,731 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 7264 transitions. Word has length 11 [2022-11-16 16:33:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:28,732 INFO L495 AbstractCegarLoop]: Abstraction has 1676 states and 7264 transitions. [2022-11-16 16:33:28,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-11-16 16:33:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 7264 transitions. [2022-11-16 16:33:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:33:28,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:28,733 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:28,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 16:33:28,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:28,948 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1360982837, now seen corresponding path program 1 times [2022-11-16 16:33:28,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:28,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548761342] [2022-11-16 16:33:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:28,949 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 [2022-11-16 16:33:28,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:28,950 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:28,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (68)] Waiting until timeout for monitored process [2022-11-16 16:33:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:29,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:33:29,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:29,247 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:33:29,247 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 16:33:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:33:29,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:33:29,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:29,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548761342] [2022-11-16 16:33:29,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548761342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:33:29,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:33:29,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:33:29,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288775855] [2022-11-16 16:33:29,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:33:29,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:33:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:33:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:29,487 INFO L87 Difference]: Start difference. First operand 1676 states and 7264 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:33:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:29,624 INFO L93 Difference]: Finished difference Result 1675 states and 7261 transitions. [2022-11-16 16:33:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:33:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 11 [2022-11-16 16:33:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:29,630 INFO L225 Difference]: With dead ends: 1675 [2022-11-16 16:33:29,630 INFO L226 Difference]: Without dead ends: 1675 [2022-11-16 16:33:29,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:33:29,631 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:29,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 16:33:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-11-16 16:33:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1675. [2022-11-16 16:33:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1636 states have (on average 4.438264058679707) internal successors, (7261), 1674 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 7261 transitions. [2022-11-16 16:33:29,681 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 7261 transitions. Word has length 11 [2022-11-16 16:33:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:29,681 INFO L495 AbstractCegarLoop]: Abstraction has 1675 states and 7261 transitions. [2022-11-16 16:33:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:33:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 7261 transitions. [2022-11-16 16:33:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:33:29,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:29,682 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:29,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (68)] Ended with exit code 0 [2022-11-16 16:33:29,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:29,883 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:29,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1360982836, now seen corresponding path program 1 times [2022-11-16 16:33:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:29,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034377027] [2022-11-16 16:33:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:29,884 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 [2022-11-16 16:33:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:29,885 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:29,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:30,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:33:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:30,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:33:30,269 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 16:33:30,269 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 16:33:30,285 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 42 treesize of output 38 [2022-11-16 16:33:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:33:30,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:33:31,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034377027] [2022-11-16 16:33:31,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034377027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1416286949] [2022-11-16 16:33:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:33:31,631 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:33:31,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:33:31,632 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:33:31,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-16 16:33:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:33:32,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:33:32,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:32,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:33:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:33:32,178 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 16:33:32,179 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 16:33:32,197 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 42 treesize of output 38 [2022-11-16 16:33:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:33:32,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:33:32,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1416286949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:33:32,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:33:32,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-16 16:33:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889707173] [2022-11-16 16:33:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:33:32,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:33:32,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:33:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:33:32,387 INFO L87 Difference]: Start difference. First operand 1675 states and 7261 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:33:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:32,535 INFO L93 Difference]: Finished difference Result 1674 states and 7258 transitions. [2022-11-16 16:33:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:33:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 11 [2022-11-16 16:33:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:32,540 INFO L225 Difference]: With dead ends: 1674 [2022-11-16 16:33:32,541 INFO L226 Difference]: Without dead ends: 1674 [2022-11-16 16:33:32,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:33:32,541 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:32,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 16:33:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-11-16 16:33:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1674. [2022-11-16 16:33:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1635 states have (on average 4.43914373088685) internal successors, (7258), 1673 states have internal predecessors, (7258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 7258 transitions. [2022-11-16 16:33:32,576 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 7258 transitions. Word has length 11 [2022-11-16 16:33:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:32,576 INFO L495 AbstractCegarLoop]: Abstraction has 1674 states and 7258 transitions. [2022-11-16 16:33:32,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 16:33:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 7258 transitions. [2022-11-16 16:33:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:33:32,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:32,578 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:32,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-16 16:33:32,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:33:32,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:32,982 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:32,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1361031784, now seen corresponding path program 2 times [2022-11-16 16:33:32,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:32,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258423844] [2022-11-16 16:33:32,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:33:32,983 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 [2022-11-16 16:33:32,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:32,984 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:32,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (71)] Waiting until timeout for monitored process [2022-11-16 16:33:33,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:33:33,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:33:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:33:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:33,347 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:33:33,347 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 16:33:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:33,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:34,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:33:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258423844] [2022-11-16 16:33:34,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258423844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1059708122] [2022-11-16 16:33:34,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:33:34,706 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:33:34,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:33:34,706 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:33:34,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-16 16:33:35,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:33:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:33:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:33:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:35,278 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:33:35,278 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:33:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:35,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:33:38,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1059708122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:38,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273727740] [2022-11-16 16:33:38,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:33:38,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:33:38,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:33:38,306 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:33:38,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-16 16:33:38,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:33:38,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:33:38,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:33:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:38,699 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:33:38,699 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:33:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:33:39,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:33:41,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273727740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:41,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:33:41,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 4, 4] total 36 [2022-11-16 16:33:41,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774479046] [2022-11-16 16:33:41,051 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:33:41,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 16:33:41,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:41,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 16:33:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 16:33:41,052 INFO L87 Difference]: Start difference. First operand 1674 states and 7258 transitions. Second operand has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 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) [2022-11-16 16:33:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:33:57,790 INFO L93 Difference]: Finished difference Result 3394 states and 14826 transitions. [2022-11-16 16:33:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 16:33:57,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 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 11 [2022-11-16 16:33:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:33:57,801 INFO L225 Difference]: With dead ends: 3394 [2022-11-16 16:33:57,801 INFO L226 Difference]: Without dead ends: 3394 [2022-11-16 16:33:57,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=526, Invalid=2896, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 16:33:57,802 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1083 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:33:57,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1083 Valid, 237 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2137 Invalid, 0 Unknown, 291 Unchecked, 13.7s Time] [2022-11-16 16:33:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2022-11-16 16:33:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 2164. [2022-11-16 16:33:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2125 states have (on average 4.501647058823529) internal successors, (9566), 2163 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:33:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 9566 transitions. [2022-11-16 16:33:57,853 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 9566 transitions. Word has length 11 [2022-11-16 16:33:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:33:57,853 INFO L495 AbstractCegarLoop]: Abstraction has 2164 states and 9566 transitions. [2022-11-16 16:33:57,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 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) [2022-11-16 16:33:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 9566 transitions. [2022-11-16 16:33:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:33:57,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:33:57,854 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:33:57,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (71)] Forceful destruction successful, exit code 0 [2022-11-16 16:33:58,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-16 16:33:58,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2022-11-16 16:33:58,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:33:58,455 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:33:58,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:33:58,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1151293534, now seen corresponding path program 3 times [2022-11-16 16:33:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:33:58,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819858189] [2022-11-16 16:33:58,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:33:58,456 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 [2022-11-16 16:33:58,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:33:58,457 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:33:58,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:33:58,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:33:58,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:33:58,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:33:58,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:58,832 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:33:58,833 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:33:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:33:59,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:34:00,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:00,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819858189] [2022-11-16 16:34:00,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819858189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:00,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881989172] [2022-11-16 16:34:00,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:34:00,020 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:34:00,021 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:34:00,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-16 16:34:00,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:34:00,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:34:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:00,651 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:00,652 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:34:00,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:34:01,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881989172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:01,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671381782] [2022-11-16 16:34:01,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:34:01,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:01,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:34:01,174 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:34:01,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-16 16:34:01,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:34:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:34:01,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:01,609 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:01,610 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:34:01,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:34:02,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671381782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:02,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:34:02,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 11 [2022-11-16 16:34:02,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566229425] [2022-11-16 16:34:02,106 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:34:02,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 16:34:02,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:02,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 16:34:02,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:34:02,107 INFO L87 Difference]: Start difference. First operand 2164 states and 9566 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-11-16 16:34:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:06,271 INFO L93 Difference]: Finished difference Result 3857 states and 16764 transitions. [2022-11-16 16:34:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:34:06,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2022-11-16 16:34:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:06,287 INFO L225 Difference]: With dead ends: 3857 [2022-11-16 16:34:06,287 INFO L226 Difference]: Without dead ends: 3857 [2022-11-16 16:34:06,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:34:06,287 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 541 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:06,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 35 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 16:34:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2022-11-16 16:34:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 2263. [2022-11-16 16:34:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2224 states have (on average 4.529226618705036) internal successors, (10073), 2262 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 10073 transitions. [2022-11-16 16:34:06,381 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 10073 transitions. Word has length 11 [2022-11-16 16:34:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:06,381 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 10073 transitions. [2022-11-16 16:34:06,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-11-16 16:34:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 10073 transitions. [2022-11-16 16:34:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:06,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:06,382 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:06,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:06,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:06,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 16:34:06,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:34:06,983 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:06,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1140486275, now seen corresponding path program 1 times [2022-11-16 16:34:06,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:06,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647468553] [2022-11-16 16:34:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:06,984 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 [2022-11-16 16:34:06,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:06,985 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:06,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (77)] Waiting until timeout for monitored process [2022-11-16 16:34:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:34:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:07,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:07,560 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 [2022-11-16 16:34:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:07,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:07,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647468553] [2022-11-16 16:34:07,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647468553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1402747108] [2022-11-16 16:34:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:07,767 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:34:07,768 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:34:07,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-16 16:34:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:34:08,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:08,288 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:08,289 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:08,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:09,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1402747108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:09,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991458196] [2022-11-16 16:34:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:09,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:09,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:34:09,327 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:34:09,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-16 16:34:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:34:09,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:09,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:09,688 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:10,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:10,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991458196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:10,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:34:10,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:34:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506786125] [2022-11-16 16:34:10,562 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:34:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:34:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:34:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:34:10,563 INFO L87 Difference]: Start difference. First operand 2263 states and 10073 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:14,462 INFO L93 Difference]: Finished difference Result 2282 states and 10104 transitions. [2022-11-16 16:34:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:34:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:34:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:14,470 INFO L225 Difference]: With dead ends: 2282 [2022-11-16 16:34:14,470 INFO L226 Difference]: Without dead ends: 2282 [2022-11-16 16:34:14,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:34:14,470 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 160 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:14,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 44 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 279 Invalid, 0 Unknown, 11 Unchecked, 1.5s Time] [2022-11-16 16:34:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2022-11-16 16:34:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2270. [2022-11-16 16:34:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2231 states have (on average 4.523532048408785) internal successors, (10092), 2269 states have internal predecessors, (10092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 10092 transitions. [2022-11-16 16:34:14,512 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 10092 transitions. Word has length 11 [2022-11-16 16:34:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:14,513 INFO L495 AbstractCegarLoop]: Abstraction has 2270 states and 10092 transitions. [2022-11-16 16:34:14,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 10092 transitions. [2022-11-16 16:34:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:14,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:14,514 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:14,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-11-16 16:34:14,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (77)] Ended with exit code 0 [2022-11-16 16:34:14,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:15,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:15,116 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1125902015, now seen corresponding path program 2 times [2022-11-16 16:34:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:15,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700785071] [2022-11-16 16:34:15,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:34:15,117 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 [2022-11-16 16:34:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:15,118 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:15,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (80)] Waiting until timeout for monitored process [2022-11-16 16:34:15,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:34:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:34:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:15,463 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:15,463 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:15,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:34:15,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700785071] [2022-11-16 16:34:15,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700785071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:34:15,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:34:15,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:34:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164651786] [2022-11-16 16:34:15,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:34:15,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:34:15,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:34:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:34:15,736 INFO L87 Difference]: Start difference. First operand 2270 states and 10092 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) 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) [2022-11-16 16:34:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:16,493 INFO L93 Difference]: Finished difference Result 3121 states and 12855 transitions. [2022-11-16 16:34:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:34:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) 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 11 [2022-11-16 16:34:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:16,503 INFO L225 Difference]: With dead ends: 3121 [2022-11-16 16:34:16,503 INFO L226 Difference]: Without dead ends: 3121 [2022-11-16 16:34:16,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:34:16,504 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 147 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:16,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 15 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-11-16 16:34:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-11-16 16:34:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2326. [2022-11-16 16:34:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2287 states have (on average 4.535198950590293) internal successors, (10372), 2325 states have internal predecessors, (10372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 10372 transitions. [2022-11-16 16:34:16,555 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 10372 transitions. Word has length 11 [2022-11-16 16:34:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:16,555 INFO L495 AbstractCegarLoop]: Abstraction has 2326 states and 10372 transitions. [2022-11-16 16:34:16,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) 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) [2022-11-16 16:34:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 10372 transitions. [2022-11-16 16:34:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:16,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:16,556 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:16,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (80)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:16,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:34:16,756 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:16,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1136065836, now seen corresponding path program 1 times [2022-11-16 16:34:16,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:16,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097037866] [2022-11-16 16:34:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:16,757 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 [2022-11-16 16:34:16,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:16,758 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:16,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (81)] Waiting until timeout for monitored process [2022-11-16 16:34:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:34:16,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:17,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:17,357 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 [2022-11-16 16:34:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:17,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097037866] [2022-11-16 16:34:17,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097037866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:17,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1090377767] [2022-11-16 16:34:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:17,565 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:34:17,566 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:34:17,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-16 16:34:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:34:17,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:18,117 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:18,117 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:18,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:19,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1090377767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:19,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235548420] [2022-11-16 16:34:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:19,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:34:19,171 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:34:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-16 16:34:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:34:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:19,559 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:19,559 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:20,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:20,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235548420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:20,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:34:20,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:34:20,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887977829] [2022-11-16 16:34:20,401 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:34:20,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:34:20,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:20,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:34:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:34:20,402 INFO L87 Difference]: Start difference. First operand 2326 states and 10372 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:24,773 INFO L93 Difference]: Finished difference Result 2389 states and 10629 transitions. [2022-11-16 16:34:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:34:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:34:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:24,780 INFO L225 Difference]: With dead ends: 2389 [2022-11-16 16:34:24,781 INFO L226 Difference]: Without dead ends: 2389 [2022-11-16 16:34:24,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:34:24,781 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 88 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:24,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 403 Invalid, 0 Unknown, 99 Unchecked, 2.0s Time] [2022-11-16 16:34:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-11-16 16:34:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2375. [2022-11-16 16:34:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2336 states have (on average 4.542808219178082) internal successors, (10612), 2374 states have internal predecessors, (10612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 10612 transitions. [2022-11-16 16:34:24,826 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 10612 transitions. Word has length 11 [2022-11-16 16:34:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:24,826 INFO L495 AbstractCegarLoop]: Abstraction has 2375 states and 10612 transitions. [2022-11-16 16:34:24,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 10612 transitions. [2022-11-16 16:34:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:24,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:24,827 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:24,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (81)] Ended with exit code 0 [2022-11-16 16:34:25,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-16 16:34:25,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-16 16:34:25,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:25,428 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1136112143, now seen corresponding path program 2 times [2022-11-16 16:34:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:25,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128573279] [2022-11-16 16:34:25,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:34:25,429 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 [2022-11-16 16:34:25,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:25,430 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:25,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (84)] Waiting until timeout for monitored process [2022-11-16 16:34:25,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:34:25,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:34:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:25,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:25,803 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:26,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:34:26,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128573279] [2022-11-16 16:34:26,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128573279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:34:26,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:34:26,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:34:26,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416258087] [2022-11-16 16:34:26,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:34:26,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:34:26,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:34:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:34:26,049 INFO L87 Difference]: Start difference. First operand 2375 states and 10612 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 16:34:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:26,634 INFO L93 Difference]: Finished difference Result 1635 states and 7126 transitions. [2022-11-16 16:34:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:34:26,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 11 [2022-11-16 16:34:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:26,639 INFO L225 Difference]: With dead ends: 1635 [2022-11-16 16:34:26,639 INFO L226 Difference]: Without dead ends: 1635 [2022-11-16 16:34:26,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:34:26,640 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 84 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:26,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:34:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-11-16 16:34:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1635. [2022-11-16 16:34:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1620 states have (on average 4.398765432098766) internal successors, (7126), 1634 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 7126 transitions. [2022-11-16 16:34:26,672 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 7126 transitions. Word has length 11 [2022-11-16 16:34:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:26,672 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 7126 transitions. [2022-11-16 16:34:26,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 16:34:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 7126 transitions. [2022-11-16 16:34:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:26,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:26,673 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:26,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (84)] Ended with exit code 0 [2022-11-16 16:34:26,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:34:26,874 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1136111406, now seen corresponding path program 2 times [2022-11-16 16:34:26,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:26,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675596310] [2022-11-16 16:34:26,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:34:26,875 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 [2022-11-16 16:34:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:26,876 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:26,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (85)] Waiting until timeout for monitored process [2022-11-16 16:34:27,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:34:27,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:27,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:34:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:27,244 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:27,244 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:27,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:34:27,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:27,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675596310] [2022-11-16 16:34:27,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675596310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:34:27,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:34:27,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:34:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790796037] [2022-11-16 16:34:27,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:34:27,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:34:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:34:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:34:27,537 INFO L87 Difference]: Start difference. First operand 1635 states and 7126 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 16:34:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:27,788 INFO L93 Difference]: Finished difference Result 1646 states and 7178 transitions. [2022-11-16 16:34:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:34:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 11 [2022-11-16 16:34:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:27,793 INFO L225 Difference]: With dead ends: 1646 [2022-11-16 16:34:27,793 INFO L226 Difference]: Without dead ends: 1646 [2022-11-16 16:34:27,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:34:27,794 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:27,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-16 16:34:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-11-16 16:34:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1642. [2022-11-16 16:34:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1627 states have (on average 4.403196066379841) internal successors, (7164), 1641 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 7164 transitions. [2022-11-16 16:34:27,826 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 7164 transitions. Word has length 11 [2022-11-16 16:34:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:27,827 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 7164 transitions. [2022-11-16 16:34:27,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 16:34:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 7164 transitions. [2022-11-16 16:34:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:27,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:27,828 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:27,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (85)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:28,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:34:28,041 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:28,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1129047219, now seen corresponding path program 3 times [2022-11-16 16:34:28,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:28,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752393684] [2022-11-16 16:34:28,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:34:28,043 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 [2022-11-16 16:34:28,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:28,044 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:28,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (86)] Waiting until timeout for monitored process [2022-11-16 16:34:28,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:34:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:34:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:28,443 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:28,443 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:28,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:34:28,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:28,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752393684] [2022-11-16 16:34:28,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752393684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:34:28,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:34:28,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:34:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183634979] [2022-11-16 16:34:28,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:34:28,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:34:28,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:34:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:34:28,679 INFO L87 Difference]: Start difference. First operand 1642 states and 7164 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) 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) [2022-11-16 16:34:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:29,308 INFO L93 Difference]: Finished difference Result 2459 states and 9691 transitions. [2022-11-16 16:34:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:34:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) 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 11 [2022-11-16 16:34:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:29,315 INFO L225 Difference]: With dead ends: 2459 [2022-11-16 16:34:29,315 INFO L226 Difference]: Without dead ends: 2459 [2022-11-16 16:34:29,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:34:29,316 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:29,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 15 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 58 Unchecked, 0.5s Time] [2022-11-16 16:34:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-11-16 16:34:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1612. [2022-11-16 16:34:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1597 states have (on average 4.385723231058234) internal successors, (7004), 1611 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 7004 transitions. [2022-11-16 16:34:29,350 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 7004 transitions. Word has length 11 [2022-11-16 16:34:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:29,350 INFO L495 AbstractCegarLoop]: Abstraction has 1612 states and 7004 transitions. [2022-11-16 16:34:29,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) 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) [2022-11-16 16:34:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 7004 transitions. [2022-11-16 16:34:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:29,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:29,351 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:29,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (86)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:34:29,552 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1129281269, now seen corresponding path program 1 times [2022-11-16 16:34:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845840498] [2022-11-16 16:34:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:29,553 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 [2022-11-16 16:34:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:29,554 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:29,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (87)] Waiting until timeout for monitored process [2022-11-16 16:34:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:34:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:29,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:29,946 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:30,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:31,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845840498] [2022-11-16 16:34:31,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845840498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060754152] [2022-11-16 16:34:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:31,281 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:34:31,282 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:34:31,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-16 16:34:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:34:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:32,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:32,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2060754152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132206429] [2022-11-16 16:34:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:32,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:32,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:34:32,928 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:34:32,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-16 16:34:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:34:33,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:33,319 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:33,319 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:33,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:33,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132206429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:33,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:34:33,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-16 16:34:33,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572772498] [2022-11-16 16:34:33,894 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:34:33,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:34:33,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:33,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:34:33,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:34:33,895 INFO L87 Difference]: Start difference. First operand 1612 states and 7004 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2022-11-16 16:34:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:36,679 INFO L93 Difference]: Finished difference Result 1799 states and 7572 transitions. [2022-11-16 16:34:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:34:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 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 11 [2022-11-16 16:34:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:36,685 INFO L225 Difference]: With dead ends: 1799 [2022-11-16 16:34:36,685 INFO L226 Difference]: Without dead ends: 1799 [2022-11-16 16:34:36,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:34:36,686 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:36,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 81 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 318 Invalid, 0 Unknown, 154 Unchecked, 1.7s Time] [2022-11-16 16:34:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-11-16 16:34:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1628. [2022-11-16 16:34:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1613 states have (on average 4.386856788592684) internal successors, (7076), 1627 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 7076 transitions. [2022-11-16 16:34:36,718 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 7076 transitions. Word has length 11 [2022-11-16 16:34:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:36,718 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 7076 transitions. [2022-11-16 16:34:36,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2022-11-16 16:34:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 7076 transitions. [2022-11-16 16:34:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:34:36,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:36,719 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:36,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (87)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:36,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2022-11-16 16:34:37,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:37,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:37,320 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1129290786, now seen corresponding path program 3 times [2022-11-16 16:34:37,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:37,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363317831] [2022-11-16 16:34:37,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:34:37,321 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 [2022-11-16 16:34:37,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:37,322 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:37,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (90)] Waiting until timeout for monitored process [2022-11-16 16:34:37,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:34:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:34:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:37,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:37,688 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:34:37,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:34:37,907 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:37,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363317831] [2022-11-16 16:34:37,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363317831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:34:37,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:34:37,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:34:37,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571483200] [2022-11-16 16:34:37,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:34:37,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:34:37,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:37,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:34:37,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:34:37,908 INFO L87 Difference]: Start difference. First operand 1628 states and 7076 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 16:34:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:38,142 INFO L93 Difference]: Finished difference Result 1667 states and 7235 transitions. [2022-11-16 16:34:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:34:38,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 11 [2022-11-16 16:34:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:38,148 INFO L225 Difference]: With dead ends: 1667 [2022-11-16 16:34:38,148 INFO L226 Difference]: Without dead ends: 1667 [2022-11-16 16:34:38,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:34:38,148 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:38,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 11 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-11-16 16:34:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-11-16 16:34:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1639. [2022-11-16 16:34:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1624 states have (on average 4.389778325123153) internal successors, (7129), 1638 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 7129 transitions. [2022-11-16 16:34:38,177 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 7129 transitions. Word has length 11 [2022-11-16 16:34:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:38,177 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 7129 transitions. [2022-11-16 16:34:38,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 16:34:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 7129 transitions. [2022-11-16 16:34:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:34:38,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:38,178 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 16:34:38,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (90)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:38,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:34:38,383 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:34:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:38,383 INFO L85 PathProgramCache]: Analyzing trace with hash -43088465, now seen corresponding path program 3 times [2022-11-16 16:34:38,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:38,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061085586] [2022-11-16 16:34:38,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:34:38,384 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 [2022-11-16 16:34:38,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:38,384 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:34:38,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (91)] Waiting until timeout for monitored process [2022-11-16 16:34:38,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:34:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:38,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:34:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:38,895 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:38,895 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:39,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:42,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:42,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061085586] [2022-11-16 16:34:42,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061085586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [767091836] [2022-11-16 16:34:42,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:34:42,931 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:42,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:34:42,932 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:34:42,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-16 16:34:43,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:34:43,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:34:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:44,122 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:44,122 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:44,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:48,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [767091836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:48,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506210274] [2022-11-16 16:34:48,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:34:48,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:48,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:34:48,122 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:34:48,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-16 16:34:50,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:34:50,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:34:50,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:34:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:50,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:34:50,328 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:34:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:50,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:34:50,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506210274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:50,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:34:50,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-16 16:34:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324353780] [2022-11-16 16:34:50,944 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:34:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 16:34:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 16:34:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 16:34:50,945 INFO L87 Difference]: Start difference. First operand 1639 states and 7129 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:21,489 INFO L93 Difference]: Finished difference Result 23609 states and 108494 transitions. [2022-11-16 16:35:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 16:35:21,491 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:35:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:21,673 INFO L225 Difference]: With dead ends: 23609 [2022-11-16 16:35:21,673 INFO L226 Difference]: Without dead ends: 23609 [2022-11-16 16:35:21,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:35:21,702 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4539 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 4206 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4539 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 4243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:21,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4539 Valid, 423 Invalid, 4243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4206 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2022-11-16 16:35:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2022-11-16 16:35:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 1651. [2022-11-16 16:35:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1636 states have (on average 4.3722493887530565) internal successors, (7153), 1650 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 7153 transitions. [2022-11-16 16:35:22,090 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 7153 transitions. Word has length 12 [2022-11-16 16:35:22,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:22,090 INFO L495 AbstractCegarLoop]: Abstraction has 1651 states and 7153 transitions. [2022-11-16 16:35:22,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 7153 transitions. [2022-11-16 16:35:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:22,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:22,091 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:22,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (92)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:22,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:22,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (91)] Ended with exit code 0 [2022-11-16 16:35:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:22,695 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash 759205390, now seen corresponding path program 1 times [2022-11-16 16:35:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:22,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301420831] [2022-11-16 16:35:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:22,696 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 [2022-11-16 16:35:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:22,697 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:22,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (94)] Waiting until timeout for monitored process [2022-11-16 16:35:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:22,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:35:23,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:23,076 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 16:35:23,076 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 16:35:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:35:23,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:23,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:23,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301420831] [2022-11-16 16:35:23,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301420831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:23,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:35:23,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:35:23,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313345215] [2022-11-16 16:35:23,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:23,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:23,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:35:23,375 INFO L87 Difference]: Start difference. First operand 1651 states and 7153 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:35:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:23,482 INFO L93 Difference]: Finished difference Result 1650 states and 7152 transitions. [2022-11-16 16:35:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:23,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 12 [2022-11-16 16:35:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:23,486 INFO L225 Difference]: With dead ends: 1650 [2022-11-16 16:35:23,487 INFO L226 Difference]: Without dead ends: 1650 [2022-11-16 16:35:23,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:35:23,487 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:23,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-16 16:35:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-16 16:35:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2022-11-16 16:35:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1636 states have (on average 4.371638141809291) internal successors, (7152), 1649 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 7152 transitions. [2022-11-16 16:35:23,516 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 7152 transitions. Word has length 12 [2022-11-16 16:35:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:23,516 INFO L495 AbstractCegarLoop]: Abstraction has 1650 states and 7152 transitions. [2022-11-16 16:35:23,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:35:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 7152 transitions. [2022-11-16 16:35:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:23,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:23,517 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:23,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (94)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:23,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:23,717 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash 759205391, now seen corresponding path program 1 times [2022-11-16 16:35:23,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:23,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240023269] [2022-11-16 16:35:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:23,719 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 [2022-11-16 16:35:23,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:23,719 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (95)] Waiting until timeout for monitored process [2022-11-16 16:35:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 16:35:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:24,184 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 16:35:24,184 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 16:35:24,205 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 14 treesize of output 12 [2022-11-16 16:35:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:25,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:27,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240023269] [2022-11-16 16:35:27,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240023269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [168855736] [2022-11-16 16:35:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:27,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:27,190 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:27,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-16 16:35:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:27,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:35:27,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:27,877 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 16:35:27,877 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 16:35:27,896 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 [2022-11-16 16:35:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:35:28,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:28,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [168855736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:28,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:28,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [9, 10] total 20 [2022-11-16 16:35:28,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721647211] [2022-11-16 16:35:28,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:28,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:28,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:28,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2022-11-16 16:35:28,155 INFO L87 Difference]: Start difference. First operand 1650 states and 7152 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:35:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:28,294 INFO L93 Difference]: Finished difference Result 1649 states and 7151 transitions. [2022-11-16 16:35:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 12 [2022-11-16 16:35:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:28,301 INFO L225 Difference]: With dead ends: 1649 [2022-11-16 16:35:28,301 INFO L226 Difference]: Without dead ends: 1649 [2022-11-16 16:35:28,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2022-11-16 16:35:28,303 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:28,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-16 16:35:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2022-11-16 16:35:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1648. [2022-11-16 16:35:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1635 states have (on average 4.373088685015291) internal successors, (7150), 1647 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 7150 transitions. [2022-11-16 16:35:28,363 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 7150 transitions. Word has length 12 [2022-11-16 16:35:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:28,363 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 7150 transitions. [2022-11-16 16:35:28,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:35:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 7150 transitions. [2022-11-16 16:35:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:28,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:28,364 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:28,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Ended with exit code 0 [2022-11-16 16:35:28,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (95)] Ended with exit code 0 [2022-11-16 16:35:28,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:28,765 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash -943427019, now seen corresponding path program 1 times [2022-11-16 16:35:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:28,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005690817] [2022-11-16 16:35:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:28,766 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 [2022-11-16 16:35:28,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:28,767 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:28,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (97)] Waiting until timeout for monitored process [2022-11-16 16:35:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:35:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:29,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:29,122 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005690817] [2022-11-16 16:35:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005690817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:29,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:35:29,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:35:29,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410452904] [2022-11-16 16:35:29,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:35:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:35:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:35:29,123 INFO L87 Difference]: Start difference. First operand 1648 states and 7150 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:29,823 INFO L93 Difference]: Finished difference Result 2147 states and 9029 transitions. [2022-11-16 16:35:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:35:29,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 12 [2022-11-16 16:35:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:29,830 INFO L225 Difference]: With dead ends: 2147 [2022-11-16 16:35:29,830 INFO L226 Difference]: Without dead ends: 2147 [2022-11-16 16:35:29,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:29,830 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 157 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:29,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 19 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:35:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2022-11-16 16:35:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1774. [2022-11-16 16:35:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1761 states have (on average 4.395797842135151) internal successors, (7741), 1773 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 7741 transitions. [2022-11-16 16:35:29,866 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 7741 transitions. Word has length 12 [2022-11-16 16:35:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:29,866 INFO L495 AbstractCegarLoop]: Abstraction has 1774 states and 7741 transitions. [2022-11-16 16:35:29,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 7741 transitions. [2022-11-16 16:35:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:29,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:29,867 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:29,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (97)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:30,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:30,081 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash -995116326, now seen corresponding path program 1 times [2022-11-16 16:35:30,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:30,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602243781] [2022-11-16 16:35:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:30,082 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 [2022-11-16 16:35:30,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:30,083 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:30,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (98)] Waiting until timeout for monitored process [2022-11-16 16:35:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:35:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:30,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:30,853 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 [2022-11-16 16:35:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:31,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602243781] [2022-11-16 16:35:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602243781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316355141] [2022-11-16 16:35:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:31,064 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:31,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-16 16:35:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:31,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:31,725 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:31,726 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:32,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:32,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [316355141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904782889] [2022-11-16 16:35:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:32,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:35:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:35:32,782 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:35:32,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-16 16:35:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:33,251 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:33,252 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:33,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:34,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904782889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:34,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:35:34,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:35:34,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910529868] [2022-11-16 16:35:34,117 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:35:34,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:35:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:35:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:35:34,118 INFO L87 Difference]: Start difference. First operand 1774 states and 7741 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:38,227 INFO L93 Difference]: Finished difference Result 1799 states and 7796 transitions. [2022-11-16 16:35:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:35:38,229 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2022-11-16 16:35:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:38,234 INFO L225 Difference]: With dead ends: 1799 [2022-11-16 16:35:38,234 INFO L226 Difference]: Without dead ends: 1799 [2022-11-16 16:35:38,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:35:38,234 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 142 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:38,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 56 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 366 Invalid, 0 Unknown, 21 Unchecked, 1.8s Time] [2022-11-16 16:35:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-11-16 16:35:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1774. [2022-11-16 16:35:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1761 states have (on average 4.395797842135151) internal successors, (7741), 1773 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 7741 transitions. [2022-11-16 16:35:38,287 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 7741 transitions. Word has length 12 [2022-11-16 16:35:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:38,287 INFO L495 AbstractCegarLoop]: Abstraction has 1774 states and 7741 transitions. [2022-11-16 16:35:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 7741 transitions. [2022-11-16 16:35:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:38,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:38,288 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:38,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2022-11-16 16:35:38,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:38,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (98)] Ended with exit code 0 [2022-11-16 16:35:38,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:38,889 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash -995334039, now seen corresponding path program 2 times [2022-11-16 16:35:38,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:38,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277986306] [2022-11-16 16:35:38,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:35:38,890 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 [2022-11-16 16:35:38,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:38,891 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:38,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (101)] Waiting until timeout for monitored process [2022-11-16 16:35:39,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:35:39,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:35:39,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:35:39,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:39,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:39,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:39,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277986306] [2022-11-16 16:35:39,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277986306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:39,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:35:39,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:35:39,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215994764] [2022-11-16 16:35:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:39,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:35:39,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:39,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:35:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:35:39,279 INFO L87 Difference]: Start difference. First operand 1774 states and 7741 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:40,013 INFO L93 Difference]: Finished difference Result 2679 states and 10889 transitions. [2022-11-16 16:35:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:35:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 12 [2022-11-16 16:35:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:40,022 INFO L225 Difference]: With dead ends: 2679 [2022-11-16 16:35:40,022 INFO L226 Difference]: Without dead ends: 2679 [2022-11-16 16:35:40,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:40,022 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 151 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:40,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 15 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:35:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2022-11-16 16:35:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1827. [2022-11-16 16:35:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1814 states have (on average 4.411245865490629) internal successors, (8002), 1826 states have internal predecessors, (8002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 8002 transitions. [2022-11-16 16:35:40,065 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 8002 transitions. Word has length 12 [2022-11-16 16:35:40,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:40,066 INFO L495 AbstractCegarLoop]: Abstraction has 1827 states and 8002 transitions. [2022-11-16 16:35:40,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 8002 transitions. [2022-11-16 16:35:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:40,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:40,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:40,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (101)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:40,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:40,269 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash -995334876, now seen corresponding path program 2 times [2022-11-16 16:35:40,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:40,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159614009] [2022-11-16 16:35:40,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:35:40,270 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 [2022-11-16 16:35:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:40,272 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:40,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (102)] Waiting until timeout for monitored process [2022-11-16 16:35:40,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:35:40,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:35:40,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:35:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:40,694 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:40,695 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:41,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:41,060 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:41,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159614009] [2022-11-16 16:35:41,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159614009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:41,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:35:41,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:35:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287244670] [2022-11-16 16:35:41,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:41,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:35:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:35:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:35:41,063 INFO L87 Difference]: Start difference. First operand 1827 states and 8002 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:41,768 INFO L93 Difference]: Finished difference Result 2171 states and 9303 transitions. [2022-11-16 16:35:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:35:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 12 [2022-11-16 16:35:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:41,776 INFO L225 Difference]: With dead ends: 2171 [2022-11-16 16:35:41,776 INFO L226 Difference]: Without dead ends: 2171 [2022-11-16 16:35:41,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:41,776 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:41,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 20 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-16 16:35:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-11-16 16:35:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1848. [2022-11-16 16:35:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1835 states have (on average 4.401634877384196) internal successors, (8077), 1847 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 8077 transitions. [2022-11-16 16:35:41,829 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 8077 transitions. Word has length 12 [2022-11-16 16:35:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:41,829 INFO L495 AbstractCegarLoop]: Abstraction has 1848 states and 8077 transitions. [2022-11-16 16:35:41,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 8077 transitions. [2022-11-16 16:35:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:41,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:41,831 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:41,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (102)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:42,043 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash -543222816, now seen corresponding path program 3 times [2022-11-16 16:35:42,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:42,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874299918] [2022-11-16 16:35:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:35:42,044 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 [2022-11-16 16:35:42,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:42,045 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:42,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (103)] Waiting until timeout for monitored process [2022-11-16 16:35:42,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:35:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:35:42,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:35:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:42,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:42,456 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:42,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:42,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874299918] [2022-11-16 16:35:42,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874299918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:42,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:35:42,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:35:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863306039] [2022-11-16 16:35:42,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:42,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:35:42,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:42,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:35:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:35:42,749 INFO L87 Difference]: Start difference. First operand 1848 states and 8077 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:43,442 INFO L93 Difference]: Finished difference Result 2353 states and 9621 transitions. [2022-11-16 16:35:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:35:43,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 12 [2022-11-16 16:35:43,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:43,448 INFO L225 Difference]: With dead ends: 2353 [2022-11-16 16:35:43,448 INFO L226 Difference]: Without dead ends: 2353 [2022-11-16 16:35:43,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:43,449 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:43,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 14 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-16 16:35:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-11-16 16:35:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1842. [2022-11-16 16:35:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1829 states have (on average 4.401312192454894) internal successors, (8050), 1841 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 8050 transitions. [2022-11-16 16:35:43,512 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 8050 transitions. Word has length 12 [2022-11-16 16:35:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:43,512 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 8050 transitions. [2022-11-16 16:35:43,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:35:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 8050 transitions. [2022-11-16 16:35:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:43,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:43,513 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:43,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (103)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:43,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:43,714 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:43,714 INFO L85 PathProgramCache]: Analyzing trace with hash 858467292, now seen corresponding path program 1 times [2022-11-16 16:35:43,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:43,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875913256] [2022-11-16 16:35:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:43,715 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 [2022-11-16 16:35:43,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:43,716 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:43,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (104)] Waiting until timeout for monitored process [2022-11-16 16:35:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:35:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:44,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:44,125 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:44,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:45,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875913256] [2022-11-16 16:35:45,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875913256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23539063] [2022-11-16 16:35:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:45,488 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:45,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:45,489 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:45,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-16 16:35:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:46,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:47,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23539063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:47,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524839929] [2022-11-16 16:35:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:35:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:35:47,315 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:35:47,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-16 16:35:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:35:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:47,759 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:47,759 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:47,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:48,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524839929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:48,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:35:48,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-16 16:35:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058654414] [2022-11-16 16:35:48,403 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:35:48,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:35:48,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:48,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:35:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:35:48,404 INFO L87 Difference]: Start difference. First operand 1842 states and 8050 transitions. Second operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:51,573 INFO L93 Difference]: Finished difference Result 2050 states and 8705 transitions. [2022-11-16 16:35:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 16:35:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:35:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:51,580 INFO L225 Difference]: With dead ends: 2050 [2022-11-16 16:35:51,580 INFO L226 Difference]: Without dead ends: 2050 [2022-11-16 16:35:51,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:35:51,581 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:51,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 88 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 353 Invalid, 0 Unknown, 228 Unchecked, 1.8s Time] [2022-11-16 16:35:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2022-11-16 16:35:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1861. [2022-11-16 16:35:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1848 states have (on average 4.401515151515151) internal successors, (8134), 1860 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 8134 transitions. [2022-11-16 16:35:51,617 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 8134 transitions. Word has length 12 [2022-11-16 16:35:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:51,618 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 8134 transitions. [2022-11-16 16:35:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 8134 transitions. [2022-11-16 16:35:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:35:51,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:51,619 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:51,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:51,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:52,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (104)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:52,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:35:52,220 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:35:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash 859731317, now seen corresponding path program 1 times [2022-11-16 16:35:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963090070] [2022-11-16 16:35:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:52,221 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 [2022-11-16 16:35:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:52,222 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:35:52,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (107)] Waiting until timeout for monitored process [2022-11-16 16:35:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:52,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:35:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:52,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:52,870 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 [2022-11-16 16:35:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:53,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963090070] [2022-11-16 16:35:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963090070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834960871] [2022-11-16 16:35:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:53,064 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:53,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:53,065 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:53,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-16 16:35:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:53,698 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:53,698 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:54,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:54,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [834960871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072136318] [2022-11-16 16:35:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:54,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:35:54,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:35:54,777 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:35:54,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-16 16:35:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:55,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:55,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:35:55,211 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:35:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:55,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:56,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072136318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:56,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:35:56,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:35:56,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903565048] [2022-11-16 16:35:56,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:35:56,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:35:56,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:35:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:35:56,093 INFO L87 Difference]: Start difference. First operand 1861 states and 8134 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:59,968 INFO L93 Difference]: Finished difference Result 1903 states and 8303 transitions. [2022-11-16 16:35:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:35:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2022-11-16 16:35:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:59,974 INFO L225 Difference]: With dead ends: 1903 [2022-11-16 16:35:59,975 INFO L226 Difference]: Without dead ends: 1903 [2022-11-16 16:35:59,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:35:59,975 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 142 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:59,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 66 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 19 Unchecked, 1.5s Time] [2022-11-16 16:35:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-11-16 16:36:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1874. [2022-11-16 16:36:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1861 states have (on average 4.411606663084363) internal successors, (8210), 1873 states have internal predecessors, (8210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 8210 transitions. [2022-11-16 16:36:00,009 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 8210 transitions. Word has length 12 [2022-11-16 16:36:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:00,009 INFO L495 AbstractCegarLoop]: Abstraction has 1874 states and 8210 transitions. [2022-11-16 16:36:00,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 8210 transitions. [2022-11-16 16:36:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:36:00,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:00,010 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:00,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:00,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-16 16:36:00,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (107)] Ended with exit code 0 [2022-11-16 16:36:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:00,611 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 859715166, now seen corresponding path program 1 times [2022-11-16 16:36:00,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886902008] [2022-11-16 16:36:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:00,612 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 [2022-11-16 16:36:00,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:00,613 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:00,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (110)] Waiting until timeout for monitored process [2022-11-16 16:36:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:36:00,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:01,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:01,277 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 [2022-11-16 16:36:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:01,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:01,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886902008] [2022-11-16 16:36:01,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886902008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:01,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1266495556] [2022-11-16 16:36:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:01,479 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:01,481 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:01,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-16 16:36:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:01,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:02,116 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:02,116 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:02,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:03,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1266495556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:03,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238254612] [2022-11-16 16:36:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:03,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:03,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:03,242 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:03,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-16 16:36:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:03,739 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:03,739 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:04,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:04,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238254612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:04,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:36:04,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:36:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275046609] [2022-11-16 16:36:04,717 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:36:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:36:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:36:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:36:04,718 INFO L87 Difference]: Start difference. First operand 1874 states and 8210 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:07,125 INFO L93 Difference]: Finished difference Result 1927 states and 8418 transitions. [2022-11-16 16:36:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:36:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2022-11-16 16:36:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:07,132 INFO L225 Difference]: With dead ends: 1927 [2022-11-16 16:36:07,132 INFO L226 Difference]: Without dead ends: 1927 [2022-11-16 16:36:07,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:36:07,132 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:07,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 103 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 452 Invalid, 0 Unknown, 16 Unchecked, 2.1s Time] [2022-11-16 16:36:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2022-11-16 16:36:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1900. [2022-11-16 16:36:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1887 states have (on average 4.414944356120826) internal successors, (8331), 1899 states have internal predecessors, (8331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 8331 transitions. [2022-11-16 16:36:07,166 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 8331 transitions. Word has length 12 [2022-11-16 16:36:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:07,166 INFO L495 AbstractCegarLoop]: Abstraction has 1900 states and 8331 transitions. [2022-11-16 16:36:07,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 8331 transitions. [2022-11-16 16:36:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:36:07,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:07,168 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:07,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (111)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:07,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (110)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:07,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-11-16 16:36:07,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:07,774 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash 859893726, now seen corresponding path program 2 times [2022-11-16 16:36:07,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165136061] [2022-11-16 16:36:07,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:36:07,775 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 [2022-11-16 16:36:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:07,776 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:07,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (113)] Waiting until timeout for monitored process [2022-11-16 16:36:08,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:36:08,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:08,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:36:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:08,219 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:08,220 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:08,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:36:08,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165136061] [2022-11-16 16:36:08,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165136061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:36:08,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:36:08,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:36:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800807221] [2022-11-16 16:36:08,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:36:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:36:08,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:36:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:36:08,508 INFO L87 Difference]: Start difference. First operand 1900 states and 8331 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-16 16:36:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:08,722 INFO L93 Difference]: Finished difference Result 1910 states and 8367 transitions. [2022-11-16 16:36:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:36:08,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 12 [2022-11-16 16:36:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:08,728 INFO L225 Difference]: With dead ends: 1910 [2022-11-16 16:36:08,728 INFO L226 Difference]: Without dead ends: 1910 [2022-11-16 16:36:08,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:36:08,729 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:08,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-16 16:36:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-16 16:36:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1904. [2022-11-16 16:36:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1891 states have (on average 4.414066631411951) internal successors, (8347), 1903 states have internal predecessors, (8347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 8347 transitions. [2022-11-16 16:36:08,766 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 8347 transitions. Word has length 12 [2022-11-16 16:36:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:08,767 INFO L495 AbstractCegarLoop]: Abstraction has 1904 states and 8347 transitions. [2022-11-16 16:36:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-16 16:36:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 8347 transitions. [2022-11-16 16:36:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:36:08,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:08,769 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:08,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (113)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:08,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:08,983 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash 640727539, now seen corresponding path program 3 times [2022-11-16 16:36:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419405095] [2022-11-16 16:36:08,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:36:08,984 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 [2022-11-16 16:36:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:08,985 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:08,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (114)] Waiting until timeout for monitored process [2022-11-16 16:36:09,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:36:09,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:09,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:36:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:09,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:36:09,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419405095] [2022-11-16 16:36:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419405095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:36:09,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:36:09,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:36:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301902007] [2022-11-16 16:36:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:36:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:36:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:36:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:36:09,376 INFO L87 Difference]: Start difference. First operand 1904 states and 8347 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:36:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:10,046 INFO L93 Difference]: Finished difference Result 2942 states and 11535 transitions. [2022-11-16 16:36:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:36:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 12 [2022-11-16 16:36:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:10,055 INFO L225 Difference]: With dead ends: 2942 [2022-11-16 16:36:10,055 INFO L226 Difference]: Without dead ends: 2942 [2022-11-16 16:36:10,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:36:10,055 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:10,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 14 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:36:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-11-16 16:36:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1760. [2022-11-16 16:36:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1747 states have (on average 4.301659988551803) internal successors, (7515), 1759 states have internal predecessors, (7515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 7515 transitions. [2022-11-16 16:36:10,102 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 7515 transitions. Word has length 12 [2022-11-16 16:36:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:10,102 INFO L495 AbstractCegarLoop]: Abstraction has 1760 states and 7515 transitions. [2022-11-16 16:36:10,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-16 16:36:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 7515 transitions. [2022-11-16 16:36:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:36:10,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:10,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:10,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (114)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:10,304 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash 640726702, now seen corresponding path program 4 times [2022-11-16 16:36:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:10,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292765119] [2022-11-16 16:36:10,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:36:10,305 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 [2022-11-16 16:36:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:10,306 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:10,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (115)] Waiting until timeout for monitored process [2022-11-16 16:36:10,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:36:10,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:10,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:36:10,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:10,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:11,045 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 [2022-11-16 16:36:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:11,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:11,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292765119] [2022-11-16 16:36:11,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292765119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:11,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442200805] [2022-11-16 16:36:11,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:36:11,252 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:11,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:11,253 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:11,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-16 16:36:11,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:36:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:11,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:11,994 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:11,994 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:12,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:13,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [442200805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817839395] [2022-11-16 16:36:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:36:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:13,142 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-16 16:36:13,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:36:13,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:13,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:13,674 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:13,675 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:14,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:14,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817839395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:14,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:36:14,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:36:14,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263286165] [2022-11-16 16:36:14,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:36:14,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:36:14,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:36:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:36:14,752 INFO L87 Difference]: Start difference. First operand 1760 states and 7515 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:16,915 INFO L93 Difference]: Finished difference Result 1778 states and 7548 transitions. [2022-11-16 16:36:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:36:16,917 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2022-11-16 16:36:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:16,922 INFO L225 Difference]: With dead ends: 1778 [2022-11-16 16:36:16,922 INFO L226 Difference]: Without dead ends: 1778 [2022-11-16 16:36:16,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:36:16,923 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 139 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:16,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 65 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 357 Invalid, 0 Unknown, 13 Unchecked, 1.8s Time] [2022-11-16 16:36:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-11-16 16:36:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1754. [2022-11-16 16:36:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1741 states have (on average 4.3004020677771395) internal successors, (7487), 1753 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 7487 transitions. [2022-11-16 16:36:16,970 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 7487 transitions. Word has length 12 [2022-11-16 16:36:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:16,971 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 7487 transitions. [2022-11-16 16:36:16,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 7487 transitions. [2022-11-16 16:36:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:36:16,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:16,973 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:16,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:17,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (116)] Ended with exit code 0 [2022-11-16 16:36:17,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (115)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:17,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:17,582 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 647950632, now seen corresponding path program 2 times [2022-11-16 16:36:17,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:17,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609813267] [2022-11-16 16:36:17,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:36:17,583 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 [2022-11-16 16:36:17,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:17,584 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:17,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (118)] Waiting until timeout for monitored process [2022-11-16 16:36:17,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:36:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:36:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:18,062 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:18,062 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:19,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609813267] [2022-11-16 16:36:19,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609813267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2063783440] [2022-11-16 16:36:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:36:19,227 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:19,228 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:19,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-16 16:36:19,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:36:19,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:36:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:20,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:20,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2063783440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:20,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339576752] [2022-11-16 16:36:20,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:36:20,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:20,952 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-16 16:36:21,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:36:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:21,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:36:21,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:21,435 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:21,435 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:21,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:22,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339576752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:22,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:36:22,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:36:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984036509] [2022-11-16 16:36:22,509 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:36:22,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:36:22,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:36:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:36:22,510 INFO L87 Difference]: Start difference. First operand 1754 states and 7487 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:25,175 INFO L93 Difference]: Finished difference Result 2021 states and 8431 transitions. [2022-11-16 16:36:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:36:25,177 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:36:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:25,182 INFO L225 Difference]: With dead ends: 2021 [2022-11-16 16:36:25,183 INFO L226 Difference]: Without dead ends: 2021 [2022-11-16 16:36:25,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:36:25,183 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:25,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 74 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 236 Invalid, 0 Unknown, 226 Unchecked, 1.5s Time] [2022-11-16 16:36:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2022-11-16 16:36:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1841. [2022-11-16 16:36:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1828 states have (on average 4.314551422319475) internal successors, (7887), 1840 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 7887 transitions. [2022-11-16 16:36:25,218 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 7887 transitions. Word has length 12 [2022-11-16 16:36:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:25,218 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 7887 transitions. [2022-11-16 16:36:25,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 7887 transitions. [2022-11-16 16:36:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:36:25,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:25,220 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:25,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-11-16 16:36:25,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (118)] Ended with exit code 0 [2022-11-16 16:36:25,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:25,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:25,821 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash 647982252, now seen corresponding path program 3 times [2022-11-16 16:36:25,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:25,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216490588] [2022-11-16 16:36:25,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:36:25,822 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 [2022-11-16 16:36:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:25,823 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:25,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (121)] Waiting until timeout for monitored process [2022-11-16 16:36:26,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:36:26,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:36:26,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:26,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:26,302 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:26,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:27,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:27,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216490588] [2022-11-16 16:36:27,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216490588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:27,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376974839] [2022-11-16 16:36:27,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:36:27,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:27,500 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:27,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-16 16:36:28,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:36:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:28,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:36:28,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:28,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:29,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376974839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146296715] [2022-11-16 16:36:29,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:36:29,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:29,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:29,273 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:29,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-16 16:36:29,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:36:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:29,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:36:29,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:29,789 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:29,789 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:30,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:30,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146296715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:30,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:36:30,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:36:30,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550833847] [2022-11-16 16:36:30,906 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:36:30,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:36:30,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:30,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:36:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:36:30,908 INFO L87 Difference]: Start difference. First operand 1841 states and 7887 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:34,083 INFO L93 Difference]: Finished difference Result 2124 states and 8884 transitions. [2022-11-16 16:36:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:36:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:36:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:34,090 INFO L225 Difference]: With dead ends: 2124 [2022-11-16 16:36:34,090 INFO L226 Difference]: Without dead ends: 2124 [2022-11-16 16:36:34,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:36:34,091 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:34,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 168 Unchecked, 1.9s Time] [2022-11-16 16:36:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-11-16 16:36:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1885. [2022-11-16 16:36:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1872 states have (on average 4.3381410256410255) internal successors, (8121), 1884 states have internal predecessors, (8121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 8121 transitions. [2022-11-16 16:36:34,124 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 8121 transitions. Word has length 12 [2022-11-16 16:36:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:34,124 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 8121 transitions. [2022-11-16 16:36:34,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 8121 transitions. [2022-11-16 16:36:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:36:34,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:34,125 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:34,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (121)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:34,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (122)] Ended with exit code 0 [2022-11-16 16:36:34,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:34,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:34,726 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash 647983318, now seen corresponding path program 1 times [2022-11-16 16:36:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:34,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335627623] [2022-11-16 16:36:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:34,727 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 [2022-11-16 16:36:34,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:34,728 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:34,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (124)] Waiting until timeout for monitored process [2022-11-16 16:36:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:36:35,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:35,175 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:35,176 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:35,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:36,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335627623] [2022-11-16 16:36:36,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335627623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205951852] [2022-11-16 16:36:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:36,693 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:36,693 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:36,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (125)] Waiting until timeout for monitored process [2022-11-16 16:36:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:36:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:36:37,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:36:37,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205951852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:36:37,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:36:37,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6] total 14 [2022-11-16 16:36:37,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971328260] [2022-11-16 16:36:37,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:36:37,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:36:37,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:36:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:36:37,243 INFO L87 Difference]: Start difference. First operand 1885 states and 8121 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) [2022-11-16 16:36:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:37,526 INFO L93 Difference]: Finished difference Result 1887 states and 7597 transitions. [2022-11-16 16:36:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:36:37,527 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 12 [2022-11-16 16:36:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:37,531 INFO L225 Difference]: With dead ends: 1887 [2022-11-16 16:36:37,531 INFO L226 Difference]: Without dead ends: 1887 [2022-11-16 16:36:37,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:36:37,532 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:37,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 8 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:36:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2022-11-16 16:36:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1707. [2022-11-16 16:36:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1698 states have (on average 4.176089517078917) internal successors, (7091), 1706 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 7091 transitions. [2022-11-16 16:36:37,560 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 7091 transitions. Word has length 12 [2022-11-16 16:36:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:37,561 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 7091 transitions. [2022-11-16 16:36:37,561 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) [2022-11-16 16:36:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 7091 transitions. [2022-11-16 16:36:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:36:37,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:37,562 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:37,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (124)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:37,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (125)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:37,962 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash -434346720, now seen corresponding path program 3 times [2022-11-16 16:36:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:37,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716349203] [2022-11-16 16:36:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:36:37,964 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 [2022-11-16 16:36:37,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:37,965 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:37,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (126)] Waiting until timeout for monitored process [2022-11-16 16:36:38,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:36:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:38,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:36:38,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:38,411 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:38,411 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:36:38,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:36:38,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:38,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716349203] [2022-11-16 16:36:38,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716349203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:36:38,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:36:38,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:36:38,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069525583] [2022-11-16 16:36:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:36:38,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:36:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:36:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:36:38,656 INFO L87 Difference]: Start difference. First operand 1707 states and 7091 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-16 16:36:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:38,857 INFO L93 Difference]: Finished difference Result 1717 states and 7126 transitions. [2022-11-16 16:36:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:36:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 13 [2022-11-16 16:36:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:38,863 INFO L225 Difference]: With dead ends: 1717 [2022-11-16 16:36:38,863 INFO L226 Difference]: Without dead ends: 1717 [2022-11-16 16:36:38,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:36:38,864 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:38,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-16 16:36:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-11-16 16:36:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1704. [2022-11-16 16:36:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1695 states have (on average 4.173451327433629) internal successors, (7074), 1703 states have internal predecessors, (7074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 7074 transitions. [2022-11-16 16:36:38,901 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 7074 transitions. Word has length 13 [2022-11-16 16:36:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:38,902 INFO L495 AbstractCegarLoop]: Abstraction has 1704 states and 7074 transitions. [2022-11-16 16:36:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-16 16:36:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 7074 transitions. [2022-11-16 16:36:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:36:38,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:38,904 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:38,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (126)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:39,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:39,116 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash -783839519, now seen corresponding path program 1 times [2022-11-16 16:36:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:39,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433444013] [2022-11-16 16:36:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:39,116 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 [2022-11-16 16:36:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:39,117 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:39,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (127)] Waiting until timeout for monitored process [2022-11-16 16:36:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:39,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:36:39,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:39,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:39,839 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 [2022-11-16 16:36:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:40,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433444013] [2022-11-16 16:36:40,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433444013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2108578134] [2022-11-16 16:36:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:40,028 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:40,030 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:40,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (128)] Waiting until timeout for monitored process [2022-11-16 16:36:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:40,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:40,767 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:41,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:41,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2108578134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:41,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596238215] [2022-11-16 16:36:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:41,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:41,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:41,859 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:41,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-16 16:36:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:42,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:42,349 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:43,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596238215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:43,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:36:43,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:36:43,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612018411] [2022-11-16 16:36:43,271 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:36:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:36:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:36:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:36:43,272 INFO L87 Difference]: Start difference. First operand 1704 states and 7074 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:45,183 INFO L93 Difference]: Finished difference Result 1734 states and 7176 transitions. [2022-11-16 16:36:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:36:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-16 16:36:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:45,188 INFO L225 Difference]: With dead ends: 1734 [2022-11-16 16:36:45,189 INFO L226 Difference]: Without dead ends: 1734 [2022-11-16 16:36:45,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:36:45,189 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 124 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:45,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 97 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 397 Invalid, 0 Unknown, 44 Unchecked, 1.6s Time] [2022-11-16 16:36:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-11-16 16:36:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1707. [2022-11-16 16:36:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1698 states have (on average 4.173144876325089) internal successors, (7086), 1706 states have internal predecessors, (7086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 7086 transitions. [2022-11-16 16:36:45,235 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 7086 transitions. Word has length 13 [2022-11-16 16:36:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:45,236 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 7086 transitions. [2022-11-16 16:36:45,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 7086 transitions. [2022-11-16 16:36:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:36:45,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:45,238 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:45,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (127)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:45,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:45,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (128)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:45,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:45,851 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash -783793949, now seen corresponding path program 2 times [2022-11-16 16:36:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:45,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776459709] [2022-11-16 16:36:45,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:36:45,852 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 [2022-11-16 16:36:45,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:45,853 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:45,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (130)] Waiting until timeout for monitored process [2022-11-16 16:36:46,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:36:46,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:36:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:46,278 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:46,279 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:46,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:36:46,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:46,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776459709] [2022-11-16 16:36:46,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776459709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:36:46,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:36:46,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:36:46,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137267429] [2022-11-16 16:36:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:36:46,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:36:46,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:36:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:36:46,580 INFO L87 Difference]: Start difference. First operand 1707 states and 7086 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:36:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:47,160 INFO L93 Difference]: Finished difference Result 1974 states and 8079 transitions. [2022-11-16 16:36:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:36:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 13 [2022-11-16 16:36:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:47,165 INFO L225 Difference]: With dead ends: 1974 [2022-11-16 16:36:47,165 INFO L226 Difference]: Without dead ends: 1974 [2022-11-16 16:36:47,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:36:47,166 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:47,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 22 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-11-16 16:36:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-11-16 16:36:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1704. [2022-11-16 16:36:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1695 states have (on average 4.173451327433629) internal successors, (7074), 1703 states have internal predecessors, (7074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 7074 transitions. [2022-11-16 16:36:47,195 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 7074 transitions. Word has length 13 [2022-11-16 16:36:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:47,195 INFO L495 AbstractCegarLoop]: Abstraction has 1704 states and 7074 transitions. [2022-11-16 16:36:47,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:36:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 7074 transitions. [2022-11-16 16:36:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:36:47,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:47,196 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:47,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (130)] Ended with exit code 0 [2022-11-16 16:36:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:47,397 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash -790624086, now seen corresponding path program 1 times [2022-11-16 16:36:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:47,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080548368] [2022-11-16 16:36:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:47,398 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 [2022-11-16 16:36:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:47,399 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:47,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (131)] Waiting until timeout for monitored process [2022-11-16 16:36:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:47,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:36:47,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:47,854 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:47,855 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:48,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:49,211 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080548368] [2022-11-16 16:36:49,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080548368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [746302015] [2022-11-16 16:36:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:49,212 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:49,213 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:49,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (132)] Waiting until timeout for monitored process [2022-11-16 16:36:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:49,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:50,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:51,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [746302015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:51,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662705921] [2022-11-16 16:36:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:51,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:51,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:51,134 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:51,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-16 16:36:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:36:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:51,609 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:51,609 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:51,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:52,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662705921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:52,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:36:52,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-16 16:36:52,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791731229] [2022-11-16 16:36:52,256 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:36:52,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:36:52,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:36:52,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:36:52,257 INFO L87 Difference]: Start difference. First operand 1704 states and 7074 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:54,521 INFO L93 Difference]: Finished difference Result 1877 states and 7605 transitions. [2022-11-16 16:36:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:36:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:36:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:54,527 INFO L225 Difference]: With dead ends: 1877 [2022-11-16 16:36:54,527 INFO L226 Difference]: Without dead ends: 1877 [2022-11-16 16:36:54,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:36:54,528 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:54,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 69 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 147 Unchecked, 1.2s Time] [2022-11-16 16:36:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-16 16:36:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1717. [2022-11-16 16:36:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1708 states have (on average 4.172131147540983) internal successors, (7126), 1716 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 7126 transitions. [2022-11-16 16:36:54,558 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 7126 transitions. Word has length 13 [2022-11-16 16:36:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:54,558 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 7126 transitions. [2022-11-16 16:36:54,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 7126 transitions. [2022-11-16 16:36:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:36:54,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:54,559 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:54,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:54,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (132)] Ended with exit code 0 [2022-11-16 16:36:54,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (131)] Ended with exit code 0 [2022-11-16 16:36:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:55,160 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash -790614569, now seen corresponding path program 3 times [2022-11-16 16:36:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318334163] [2022-11-16 16:36:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:36:55,161 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 [2022-11-16 16:36:55,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:55,162 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:55,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (134)] Waiting until timeout for monitored process [2022-11-16 16:36:55,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:36:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:55,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:36:55,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:55,608 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:55,608 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:36:55,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:36:55,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:55,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318334163] [2022-11-16 16:36:55,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318334163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:36:55,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:36:55,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:36:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424649706] [2022-11-16 16:36:55,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:36:55,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:36:55,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:36:55,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:36:55,881 INFO L87 Difference]: Start difference. First operand 1717 states and 7126 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:36:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:56,539 INFO L93 Difference]: Finished difference Result 1994 states and 8128 transitions. [2022-11-16 16:36:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:36:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 13 [2022-11-16 16:36:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:56,545 INFO L225 Difference]: With dead ends: 1994 [2022-11-16 16:36:56,545 INFO L226 Difference]: Without dead ends: 1994 [2022-11-16 16:36:56,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:36:56,545 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:56,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 20 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 58 Unchecked, 0.5s Time] [2022-11-16 16:36:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2022-11-16 16:36:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1717. [2022-11-16 16:36:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1708 states have (on average 4.172131147540983) internal successors, (7126), 1716 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 7126 transitions. [2022-11-16 16:36:56,578 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 7126 transitions. Word has length 13 [2022-11-16 16:36:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:56,578 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 7126 transitions. [2022-11-16 16:36:56,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:36:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 7126 transitions. [2022-11-16 16:36:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:36:56,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:56,580 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:56,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (134)] Ended with exit code 0 [2022-11-16 16:36:56,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:36:56,781 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:36:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash 551281303, now seen corresponding path program 4 times [2022-11-16 16:36:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:56,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275661885] [2022-11-16 16:36:56,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:36:56,781 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 [2022-11-16 16:36:56,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:56,782 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:36:56,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (135)] Waiting until timeout for monitored process [2022-11-16 16:36:57,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:36:57,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:57,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:36:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:57,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:57,505 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 [2022-11-16 16:36:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:57,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275661885] [2022-11-16 16:36:57,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275661885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624546393] [2022-11-16 16:36:57,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:36:57,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:57,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:57,705 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:57,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (136)] Waiting until timeout for monitored process [2022-11-16 16:36:58,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:36:58,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:58,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:58,445 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:58,446 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:36:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:58,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:59,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624546393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:59,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083480265] [2022-11-16 16:36:59,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:36:59,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:59,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:59,488 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:59,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-16 16:36:59,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:36:59,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:36:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:36:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:59,996 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:36:59,997 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:02,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:02,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083480265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:02,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:37:02,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:37:02,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715996752] [2022-11-16 16:37:02,908 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:37:02,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:37:02,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:02,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:37:02,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=580, Unknown=1, NotChecked=0, Total=702 [2022-11-16 16:37:02,909 INFO L87 Difference]: Start difference. First operand 1717 states and 7126 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:06,358 INFO L93 Difference]: Finished difference Result 1753 states and 7257 transitions. [2022-11-16 16:37:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:37:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-16 16:37:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:06,363 INFO L225 Difference]: With dead ends: 1753 [2022-11-16 16:37:06,364 INFO L226 Difference]: Without dead ends: 1753 [2022-11-16 16:37:06,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=162, Invalid=767, Unknown=1, NotChecked=0, Total=930 [2022-11-16 16:37:06,364 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 164 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:06,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 77 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 61 Unchecked, 1.1s Time] [2022-11-16 16:37:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-11-16 16:37:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1717. [2022-11-16 16:37:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1708 states have (on average 4.172131147540983) internal successors, (7126), 1716 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 7126 transitions. [2022-11-16 16:37:06,395 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 7126 transitions. Word has length 13 [2022-11-16 16:37:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:06,395 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 7126 transitions. [2022-11-16 16:37:06,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 7126 transitions. [2022-11-16 16:37:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:37:06,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:06,396 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:06,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:06,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (135)] Ended with exit code 0 [2022-11-16 16:37:06,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (136)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:06,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:06,997 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:37:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:06,997 INFO L85 PathProgramCache]: Analyzing trace with hash 340828596, now seen corresponding path program 2 times [2022-11-16 16:37:06,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:06,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954010139] [2022-11-16 16:37:06,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:37:06,998 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 [2022-11-16 16:37:06,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:06,999 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:37:07,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (138)] Waiting until timeout for monitored process [2022-11-16 16:37:07,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:37:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:07,494 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:07,494 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:08,646 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:08,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954010139] [2022-11-16 16:37:08,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954010139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:08,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870198153] [2022-11-16 16:37:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:37:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:08,651 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:08,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (139)] Waiting until timeout for monitored process [2022-11-16 16:37:09,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:09,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:09,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:37:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:09,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:10,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1870198153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554128093] [2022-11-16 16:37:10,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:37:10,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:37:10,370 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:37:10,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-16 16:37:10,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:10,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:37:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:10,926 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:10,926 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:11,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:11,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554128093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:11,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:37:11,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:37:11,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129412607] [2022-11-16 16:37:11,996 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:37:11,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:37:11,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:37:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:37:11,996 INFO L87 Difference]: Start difference. First operand 1717 states and 7126 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-11-16 16:37:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:14,849 INFO L93 Difference]: Finished difference Result 1939 states and 7902 transitions. [2022-11-16 16:37:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:37:14,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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 13 [2022-11-16 16:37:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:14,855 INFO L225 Difference]: With dead ends: 1939 [2022-11-16 16:37:14,856 INFO L226 Difference]: Without dead ends: 1939 [2022-11-16 16:37:14,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:37:14,856 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 67 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:14,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 70 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 243 Invalid, 0 Unknown, 155 Unchecked, 1.7s Time] [2022-11-16 16:37:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-11-16 16:37:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1763. [2022-11-16 16:37:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1754 states have (on average 4.192702394526796) internal successors, (7354), 1762 states have internal predecessors, (7354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 7354 transitions. [2022-11-16 16:37:14,886 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 7354 transitions. Word has length 13 [2022-11-16 16:37:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:14,886 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 7354 transitions. [2022-11-16 16:37:14,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-11-16 16:37:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 7354 transitions. [2022-11-16 16:37:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:37:14,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:14,888 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:14,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (139)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:15,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (138)] Ended with exit code 0 [2022-11-16 16:37:15,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-11-16 16:37:15,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:15,488 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:37:15,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash 340755126, now seen corresponding path program 3 times [2022-11-16 16:37:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:15,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729053302] [2022-11-16 16:37:15,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:37:15,489 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 [2022-11-16 16:37:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:15,490 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:37:15,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (141)] Waiting until timeout for monitored process [2022-11-16 16:37:15,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:37:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:37:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:15,997 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:15,997 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:16,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:17,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729053302] [2022-11-16 16:37:17,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729053302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1316949216] [2022-11-16 16:37:17,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:37:17,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:17,166 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:17,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (142)] Waiting until timeout for monitored process [2022-11-16 16:37:17,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:37:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:37:17,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:18,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:18,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1316949216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922052108] [2022-11-16 16:37:18,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:37:18,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:18,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:37:18,864 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:37:18,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-16 16:37:19,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:37:19,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:37:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:19,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:19,421 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:19,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:20,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922052108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:20,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:37:20,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:37:20,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042884759] [2022-11-16 16:37:20,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:37:20,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:37:20,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:37:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:37:20,471 INFO L87 Difference]: Start difference. First operand 1763 states and 7354 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-11-16 16:37:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:23,294 INFO L93 Difference]: Finished difference Result 2027 states and 8354 transitions. [2022-11-16 16:37:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 16:37:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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 13 [2022-11-16 16:37:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:23,301 INFO L225 Difference]: With dead ends: 2027 [2022-11-16 16:37:23,301 INFO L226 Difference]: Without dead ends: 2027 [2022-11-16 16:37:23,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:37:23,301 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:23,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 78 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 217 Unchecked, 1.5s Time] [2022-11-16 16:37:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-16 16:37:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1826. [2022-11-16 16:37:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1817 states have (on average 4.22399559713814) internal successors, (7675), 1825 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 7675 transitions. [2022-11-16 16:37:23,333 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 7675 transitions. Word has length 13 [2022-11-16 16:37:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:23,333 INFO L495 AbstractCegarLoop]: Abstraction has 1826 states and 7675 transitions. [2022-11-16 16:37:23,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-11-16 16:37:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 7675 transitions. [2022-11-16 16:37:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:37:23,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:23,334 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:23,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (142)] Ended with exit code 0 [2022-11-16 16:37:23,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-16 16:37:23,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (141)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:23,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:37:23,935 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:37:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 341254753, now seen corresponding path program 5 times [2022-11-16 16:37:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596659291] [2022-11-16 16:37:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:37:23,936 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 [2022-11-16 16:37:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:23,937 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:37:23,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (144)] Waiting until timeout for monitored process [2022-11-16 16:37:24,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:24,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:37:24,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:24,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:24,713 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 [2022-11-16 16:37:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:24,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596659291] [2022-11-16 16:37:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596659291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [844537613] [2022-11-16 16:37:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:37:24,901 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:24,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:24,901 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:24,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (145)] Waiting until timeout for monitored process [2022-11-16 16:37:25,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:37:25,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:25,686 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:25,687 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:26,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:26,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [844537613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235183141] [2022-11-16 16:37:26,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:37:26,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:37:26,735 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:37:26,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-16 16:37:27,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:27,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:37:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:27,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:27,253 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:27,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:28,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235183141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:28,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:37:28,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:37:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727311464] [2022-11-16 16:37:28,207 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:37:28,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:37:28,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:37:28,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:37:28,208 INFO L87 Difference]: Start difference. First operand 1826 states and 7675 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:30,275 INFO L93 Difference]: Finished difference Result 1855 states and 7781 transitions. [2022-11-16 16:37:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:37:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-16 16:37:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:30,282 INFO L225 Difference]: With dead ends: 1855 [2022-11-16 16:37:30,282 INFO L226 Difference]: Without dead ends: 1855 [2022-11-16 16:37:30,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:37:30,282 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 80 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:30,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 92 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 402 Invalid, 0 Unknown, 65 Unchecked, 1.7s Time] [2022-11-16 16:37:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-11-16 16:37:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1821. [2022-11-16 16:37:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1812 states have (on average 4.225717439293598) internal successors, (7657), 1820 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 7657 transitions. [2022-11-16 16:37:30,319 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 7657 transitions. Word has length 13 [2022-11-16 16:37:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:30,319 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 7657 transitions. [2022-11-16 16:37:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 7657 transitions. [2022-11-16 16:37:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:37:30,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:30,321 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:30,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (144)] Ended with exit code 0 [2022-11-16 16:37:30,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-11-16 16:37:30,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (145)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:30,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:30,922 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:37:30,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:30,923 INFO L85 PathProgramCache]: Analyzing trace with hash 842677791, now seen corresponding path program 1 times [2022-11-16 16:37:30,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:30,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340142531] [2022-11-16 16:37:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:30,923 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 [2022-11-16 16:37:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:30,924 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:37:30,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (147)] Waiting until timeout for monitored process [2022-11-16 16:37:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:37:31,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:31,432 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:31,433 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:31,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:32,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340142531] [2022-11-16 16:37:32,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340142531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1759679786] [2022-11-16 16:37:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:32,810 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:32,811 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:32,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (148)] Waiting until timeout for monitored process [2022-11-16 16:37:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:37:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:34,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:34,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1759679786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822106537] [2022-11-16 16:37:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:34,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:37:34,826 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:37:34,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-16 16:37:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:37:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:35,360 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:35,360 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:35,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:36,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822106537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:36,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:37:36,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-16 16:37:36,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836590884] [2022-11-16 16:37:36,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:37:36,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:37:36,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:37:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:37:36,089 INFO L87 Difference]: Start difference. First operand 1821 states and 7657 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:38,798 INFO L93 Difference]: Finished difference Result 2166 states and 8980 transitions. [2022-11-16 16:37:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:37:38,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:37:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:38,804 INFO L225 Difference]: With dead ends: 2166 [2022-11-16 16:37:38,805 INFO L226 Difference]: Without dead ends: 2166 [2022-11-16 16:37:38,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:37:38,805 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 121 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:38,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 61 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 164 Unchecked, 1.7s Time] [2022-11-16 16:37:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2022-11-16 16:37:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1881. [2022-11-16 16:37:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1872 states have (on average 4.242521367521367) internal successors, (7942), 1880 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 7942 transitions. [2022-11-16 16:37:38,836 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 7942 transitions. Word has length 13 [2022-11-16 16:37:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:38,837 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 7942 transitions. [2022-11-16 16:37:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 7942 transitions. [2022-11-16 16:37:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:37:38,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:38,838 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:38,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-11-16 16:37:39,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (147)] Ended with exit code 0 [2022-11-16 16:37:39,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (148)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:39,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:39,439 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:37:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash 842473191, now seen corresponding path program 2 times [2022-11-16 16:37:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:39,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561956340] [2022-11-16 16:37:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:37:39,440 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 [2022-11-16 16:37:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:39,441 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:37:39,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (150)] Waiting until timeout for monitored process [2022-11-16 16:37:39,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:39,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:39,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:37:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:39,995 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:39,995 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:40,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:41,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:41,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561956340] [2022-11-16 16:37:41,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561956340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:41,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [51515242] [2022-11-16 16:37:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:37:41,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:41,106 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:41,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (151)] Waiting until timeout for monitored process [2022-11-16 16:37:41,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:41,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:37:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:42,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:42,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [51515242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:42,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515374623] [2022-11-16 16:37:42,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:37:42,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:42,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:37:42,943 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:37:42,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-11-16 16:37:43,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:37:43,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:37:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:37:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:43,604 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:43,605 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:44,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:37:44,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515374623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:44,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:37:44,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:37:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187516477] [2022-11-16 16:37:44,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:37:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:37:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:37:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:37:44,830 INFO L87 Difference]: Start difference. First operand 1881 states and 7942 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-11-16 16:37:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:47,449 INFO L93 Difference]: Finished difference Result 2111 states and 8742 transitions. [2022-11-16 16:37:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:37:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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 13 [2022-11-16 16:37:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:47,457 INFO L225 Difference]: With dead ends: 2111 [2022-11-16 16:37:47,457 INFO L226 Difference]: Without dead ends: 2111 [2022-11-16 16:37:47,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:37:47,458 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:47,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 70 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 113 Unchecked, 1.4s Time] [2022-11-16 16:37:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-11-16 16:37:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1915. [2022-11-16 16:37:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1906 states have (on average 4.252885624344176) internal successors, (8106), 1914 states have internal predecessors, (8106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 8106 transitions. [2022-11-16 16:37:47,495 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 8106 transitions. Word has length 13 [2022-11-16 16:37:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:47,496 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 8106 transitions. [2022-11-16 16:37:47,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-11-16 16:37:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 8106 transitions. [2022-11-16 16:37:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:37:47,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:47,497 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:47,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (151)] Ended with exit code 0 [2022-11-16 16:37:47,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (150)] Ended with exit code 0 [2022-11-16 16:37:47,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-11-16 16:37:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:48,098 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:37:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash 882055169, now seen corresponding path program 1 times [2022-11-16 16:37:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:48,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344514345] [2022-11-16 16:37:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:48,099 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 [2022-11-16 16:37:48,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:48,100 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:37:48,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (153)] Waiting until timeout for monitored process [2022-11-16 16:37:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:48,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:37:48,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:48,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:48,927 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 [2022-11-16 16:37:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:49,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:49,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344514345] [2022-11-16 16:37:49,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344514345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:49,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43910064] [2022-11-16 16:37:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:49,129 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:49,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2022-11-16 16:37:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:37:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:49,981 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:49,982 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:50,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:51,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43910064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763904387] [2022-11-16 16:37:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:51,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:37:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:37:51,075 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:37:51,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-11-16 16:37:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:51,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:37:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:51,667 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:51,667 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:52,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:52,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763904387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:52,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:37:52,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 25 [2022-11-16 16:37:52,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663524099] [2022-11-16 16:37:52,606 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:37:52,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:37:52,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:37:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:37:52,608 INFO L87 Difference]: Start difference. First operand 1915 states and 8106 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:56,832 INFO L93 Difference]: Finished difference Result 1949 states and 8204 transitions. [2022-11-16 16:37:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:37:56,834 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-16 16:37:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:56,839 INFO L225 Difference]: With dead ends: 1949 [2022-11-16 16:37:56,839 INFO L226 Difference]: Without dead ends: 1949 [2022-11-16 16:37:56,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:37:56,840 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:56,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 75 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 390 Invalid, 0 Unknown, 22 Unchecked, 1.9s Time] [2022-11-16 16:37:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2022-11-16 16:37:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1927. [2022-11-16 16:37:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1918 states have (on average 4.249217935349322) internal successors, (8150), 1926 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 8150 transitions. [2022-11-16 16:37:56,877 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 8150 transitions. Word has length 13 [2022-11-16 16:37:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:56,877 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 8150 transitions. [2022-11-16 16:37:56,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 8150 transitions. [2022-11-16 16:37:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:37:56,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:56,880 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:56,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (153)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:57,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-11-16 16:37:57,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (154)] Ended with exit code 0 [2022-11-16 16:37:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:57,495 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:37:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 882133010, now seen corresponding path program 1 times [2022-11-16 16:37:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:57,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907985159] [2022-11-16 16:37:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:57,496 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 [2022-11-16 16:37:57,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:57,497 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:37:57,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (156)] Waiting until timeout for monitored process [2022-11-16 16:37:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:37:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:58,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:58,295 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 [2022-11-16 16:37:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:58,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:58,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907985159] [2022-11-16 16:37:58,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907985159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:58,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [273594215] [2022-11-16 16:37:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:58,484 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:58,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:58,485 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:58,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (157)] Waiting until timeout for monitored process [2022-11-16 16:37:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:37:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:59,382 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:37:59,382 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:37:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:37:59,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:00,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [273594215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524595643] [2022-11-16 16:38:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:00,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:38:00,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:38:00,487 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:38:00,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-11-16 16:38:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:38:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:01,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 37 [2022-11-16 16:38:01,202 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 7 treesize of output 5 [2022-11-16 16:38:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:01,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:01,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524595643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:01,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:38:01,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 22 [2022-11-16 16:38:01,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868720554] [2022-11-16 16:38:01,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:01,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:38:01,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:01,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:38:01,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-11-16 16:38:01,729 INFO L87 Difference]: Start difference. First operand 1927 states and 8150 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 16:38:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:02,435 INFO L93 Difference]: Finished difference Result 3697 states and 15356 transitions. [2022-11-16 16:38:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:38:02,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 13 [2022-11-16 16:38:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:02,446 INFO L225 Difference]: With dead ends: 3697 [2022-11-16 16:38:02,446 INFO L226 Difference]: Without dead ends: 3697 [2022-11-16 16:38:02,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:38:02,447 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 101 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:02,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 19 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 221 Unchecked, 0.4s Time] [2022-11-16 16:38:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2022-11-16 16:38:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 1995. [2022-11-16 16:38:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1986 states have (on average 4.262839879154079) internal successors, (8466), 1994 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 8466 transitions. [2022-11-16 16:38:02,495 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 8466 transitions. Word has length 13 [2022-11-16 16:38:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:02,496 INFO L495 AbstractCegarLoop]: Abstraction has 1995 states and 8466 transitions. [2022-11-16 16:38:02,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 16:38:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 8466 transitions. [2022-11-16 16:38:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:38:02,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:02,497 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:02,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (157)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:02,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (156)] Ended with exit code 0 [2022-11-16 16:38:02,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-11-16 16:38:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:38:03,098 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash 881869820, now seen corresponding path program 2 times [2022-11-16 16:38:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586536445] [2022-11-16 16:38:03,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:38:03,099 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 [2022-11-16 16:38:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:03,100 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:03,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (159)] Waiting until timeout for monitored process [2022-11-16 16:38:03,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:38:03,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:03,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:38:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:03,608 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:03,609 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:04,022 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 7 treesize of output 5 [2022-11-16 16:38:04,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 37 [2022-11-16 16:38:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:04,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:04,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586536445] [2022-11-16 16:38:04,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586536445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:04,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:38:04,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:38:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095566419] [2022-11-16 16:38:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:04,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:38:04,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:38:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:38:04,338 INFO L87 Difference]: Start difference. First operand 1995 states and 8466 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:38:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:05,355 INFO L93 Difference]: Finished difference Result 3207 states and 13688 transitions. [2022-11-16 16:38:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:38:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 13 [2022-11-16 16:38:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:05,366 INFO L225 Difference]: With dead ends: 3207 [2022-11-16 16:38:05,366 INFO L226 Difference]: Without dead ends: 3207 [2022-11-16 16:38:05,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:05,367 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:05,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 18 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 152 Unchecked, 0.8s Time] [2022-11-16 16:38:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-11-16 16:38:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2031. [2022-11-16 16:38:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2022 states have (on average 4.2804154302670625) internal successors, (8655), 2030 states have internal predecessors, (8655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 8655 transitions. [2022-11-16 16:38:05,431 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 8655 transitions. Word has length 13 [2022-11-16 16:38:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:05,432 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 8655 transitions. [2022-11-16 16:38:05,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:38:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 8655 transitions. [2022-11-16 16:38:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:38:05,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:05,434 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:05,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (159)] Ended with exit code 0 [2022-11-16 16:38:05,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:38:05,634 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:05,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:05,635 INFO L85 PathProgramCache]: Analyzing trace with hash 881206730, now seen corresponding path program 3 times [2022-11-16 16:38:05,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:05,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034540185] [2022-11-16 16:38:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:38:05,635 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 [2022-11-16 16:38:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:05,636 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:05,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (160)] Waiting until timeout for monitored process [2022-11-16 16:38:05,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:38:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:38:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:06,164 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:06,165 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:06,556 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 7 treesize of output 5 [2022-11-16 16:38:06,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 37 [2022-11-16 16:38:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:06,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:06,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:06,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034540185] [2022-11-16 16:38:06,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034540185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:06,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:38:06,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:38:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999764918] [2022-11-16 16:38:06,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:06,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:38:06,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:06,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:38:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:38:06,763 INFO L87 Difference]: Start difference. First operand 2031 states and 8655 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:38:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:07,865 INFO L93 Difference]: Finished difference Result 3979 states and 16711 transitions. [2022-11-16 16:38:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:38:07,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 13 [2022-11-16 16:38:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:07,876 INFO L225 Difference]: With dead ends: 3979 [2022-11-16 16:38:07,876 INFO L226 Difference]: Without dead ends: 3979 [2022-11-16 16:38:07,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:07,877 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 134 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:07,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 16 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 72 Unchecked, 0.9s Time] [2022-11-16 16:38:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-11-16 16:38:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2004. [2022-11-16 16:38:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 1995 states have (on average 4.275187969924812) internal successors, (8529), 2003 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 8529 transitions. [2022-11-16 16:38:07,955 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 8529 transitions. Word has length 13 [2022-11-16 16:38:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:07,956 INFO L495 AbstractCegarLoop]: Abstraction has 2004 states and 8529 transitions. [2022-11-16 16:38:07,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-16 16:38:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 8529 transitions. [2022-11-16 16:38:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:38:07,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:07,957 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:07,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (160)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:08,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:38:08,158 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash 881393691, now seen corresponding path program 3 times [2022-11-16 16:38:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:08,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247416484] [2022-11-16 16:38:08,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:38:08,159 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 [2022-11-16 16:38:08,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:08,160 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:08,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (161)] Waiting until timeout for monitored process [2022-11-16 16:38:08,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:38:08,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:38:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:08,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:08,749 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:09,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:09,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:09,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247416484] [2022-11-16 16:38:09,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247416484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:09,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1902965650] [2022-11-16 16:38:09,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:38:09,982 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:09,983 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:09,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (162)] Waiting until timeout for monitored process [2022-11-16 16:38:10,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:38:10,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:10,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:38:10,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:11,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:11,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1902965650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:11,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851046764] [2022-11-16 16:38:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:38:11,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:38:11,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:38:11,909 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:38:11,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-11-16 16:38:12,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:38:12,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:12,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:38:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:12,592 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:12,593 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:13,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:13,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851046764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:13,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:38:13,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:38:13,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347567375] [2022-11-16 16:38:13,744 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:38:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:38:13,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:13,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:38:13,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:38:13,745 INFO L87 Difference]: Start difference. First operand 2004 states and 8529 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:16,407 INFO L93 Difference]: Finished difference Result 2222 states and 9275 transitions. [2022-11-16 16:38:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:38:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2022-11-16 16:38:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:16,414 INFO L225 Difference]: With dead ends: 2222 [2022-11-16 16:38:16,415 INFO L226 Difference]: Without dead ends: 2222 [2022-11-16 16:38:16,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:38:16,415 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:16,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 230 Invalid, 0 Unknown, 139 Unchecked, 1.5s Time] [2022-11-16 16:38:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-11-16 16:38:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2004. [2022-11-16 16:38:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 1995 states have (on average 4.275187969924812) internal successors, (8529), 2003 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 8529 transitions. [2022-11-16 16:38:16,457 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 8529 transitions. Word has length 13 [2022-11-16 16:38:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:16,458 INFO L495 AbstractCegarLoop]: Abstraction has 2004 states and 8529 transitions. [2022-11-16 16:38:16,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 8529 transitions. [2022-11-16 16:38:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:38:16,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:16,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:16,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (161)] Ended with exit code 0 [2022-11-16 16:38:16,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:16,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (162)] Ended with exit code 0 [2022-11-16 16:38:17,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:17,060 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1388575973, now seen corresponding path program 4 times [2022-11-16 16:38:17,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:17,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166038705] [2022-11-16 16:38:17,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:38:17,061 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 [2022-11-16 16:38:17,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:17,062 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:17,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (164)] Waiting until timeout for monitored process [2022-11-16 16:38:17,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:38:17,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:38:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:17,619 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:17,619 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:18,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:19,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166038705] [2022-11-16 16:38:19,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166038705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [969706472] [2022-11-16 16:38:19,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:38:19,123 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:19,124 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:19,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (165)] Waiting until timeout for monitored process [2022-11-16 16:38:19,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:38:19,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:38:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:20,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:21,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [969706472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:21,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101526815] [2022-11-16 16:38:21,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:38:21,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:38:21,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:38:21,258 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:38:21,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-11-16 16:38:21,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:38:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:38:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:21,849 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:21,849 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:22,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:22,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101526815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:22,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:38:22,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-16 16:38:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866290829] [2022-11-16 16:38:22,582 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:38:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:38:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:38:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:38:22,583 INFO L87 Difference]: Start difference. First operand 2004 states and 8529 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:25,149 INFO L93 Difference]: Finished difference Result 2420 states and 10359 transitions. [2022-11-16 16:38:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:38:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:38:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:25,157 INFO L225 Difference]: With dead ends: 2420 [2022-11-16 16:38:25,158 INFO L226 Difference]: Without dead ends: 2420 [2022-11-16 16:38:25,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:38:25,158 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:25,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 87 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 183 Unchecked, 1.5s Time] [2022-11-16 16:38:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-11-16 16:38:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2103. [2022-11-16 16:38:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2094 states have (on average 4.360076408787011) internal successors, (9130), 2102 states have internal predecessors, (9130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 9130 transitions. [2022-11-16 16:38:25,199 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 9130 transitions. Word has length 13 [2022-11-16 16:38:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:25,199 INFO L495 AbstractCegarLoop]: Abstraction has 2103 states and 9130 transitions. [2022-11-16 16:38:25,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 9130 transitions. [2022-11-16 16:38:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:38:25,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:25,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:25,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (165)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:25,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-11-16 16:38:25,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (164)] Ended with exit code 0 [2022-11-16 16:38:25,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:38:25,807 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash 585868553, now seen corresponding path program 1 times [2022-11-16 16:38:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499548338] [2022-11-16 16:38:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:25,809 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 [2022-11-16 16:38:25,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:25,810 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:25,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (167)] Waiting until timeout for monitored process [2022-11-16 16:38:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:38:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:26,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:26,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:26,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499548338] [2022-11-16 16:38:26,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499548338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:26,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:38:26,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:38:26,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461407013] [2022-11-16 16:38:26,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:26,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:38:26,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:26,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:38:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:38:26,211 INFO L87 Difference]: Start difference. First operand 2103 states and 9130 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2022-11-16 16:38:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:26,386 INFO L93 Difference]: Finished difference Result 2064 states and 8997 transitions. [2022-11-16 16:38:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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 [2022-11-16 16:38:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:26,393 INFO L225 Difference]: With dead ends: 2064 [2022-11-16 16:38:26,393 INFO L226 Difference]: Without dead ends: 2064 [2022-11-16 16:38:26,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:38:26,393 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:26,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:38:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-11-16 16:38:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2022-11-16 16:38:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2057 states have (on average 4.373845405930967) internal successors, (8997), 2063 states have internal predecessors, (8997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 8997 transitions. [2022-11-16 16:38:26,432 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 8997 transitions. Word has length 13 [2022-11-16 16:38:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:26,432 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 8997 transitions. [2022-11-16 16:38:26,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2022-11-16 16:38:26,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 8997 transitions. [2022-11-16 16:38:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:38:26,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:26,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:26,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (167)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:38:26,635 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 585868554, now seen corresponding path program 1 times [2022-11-16 16:38:26,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:26,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112172059] [2022-11-16 16:38:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:26,636 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 [2022-11-16 16:38:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:26,637 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:26,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (168)] Waiting until timeout for monitored process [2022-11-16 16:38:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:38:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:27,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:27,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:27,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112172059] [2022-11-16 16:38:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112172059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:27,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:38:27,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:38:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684361899] [2022-11-16 16:38:27,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:27,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:38:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:38:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:38:27,088 INFO L87 Difference]: Start difference. First operand 2064 states and 8997 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 16:38:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:27,267 INFO L93 Difference]: Finished difference Result 2025 states and 8864 transitions. [2022-11-16 16:38:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:27,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2022-11-16 16:38:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:27,274 INFO L225 Difference]: With dead ends: 2025 [2022-11-16 16:38:27,274 INFO L226 Difference]: Without dead ends: 2025 [2022-11-16 16:38:27,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:38:27,274 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:27,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:38:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-11-16 16:38:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 2025. [2022-11-16 16:38:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2020 states have (on average 4.3881188118811885) internal successors, (8864), 2024 states have internal predecessors, (8864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 8864 transitions. [2022-11-16 16:38:27,316 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 8864 transitions. Word has length 13 [2022-11-16 16:38:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:27,317 INFO L495 AbstractCegarLoop]: Abstraction has 2025 states and 8864 transitions. [2022-11-16 16:38:27,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 16:38:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 8864 transitions. [2022-11-16 16:38:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:38:27,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:27,319 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:27,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (168)] Ended with exit code 0 [2022-11-16 16:38:27,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:38:27,520 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1035438219, now seen corresponding path program 1 times [2022-11-16 16:38:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:27,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336357698] [2022-11-16 16:38:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:27,521 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 [2022-11-16 16:38:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:27,522 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:27,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (169)] Waiting until timeout for monitored process [2022-11-16 16:38:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:27,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:38:27,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:28,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:28,754 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 35 treesize of output 29 [2022-11-16 16:38:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:29,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336357698] [2022-11-16 16:38:29,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336357698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1807777935] [2022-11-16 16:38:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:29,198 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:29,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:29,199 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:29,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (170)] Waiting until timeout for monitored process [2022-11-16 16:38:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:38:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:31,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1807777935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:31,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965670321] [2022-11-16 16:38:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:31,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:38:31,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:38:31,440 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:38:31,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-11-16 16:38:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:38:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:32,054 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:32,054 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:33,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:34,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965670321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:34,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:38:34,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 38 [2022-11-16 16:38:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541789146] [2022-11-16 16:38:34,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:38:34,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 16:38:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:34,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 16:38:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:38:34,860 INFO L87 Difference]: Start difference. First operand 2025 states and 8864 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:42,027 INFO L93 Difference]: Finished difference Result 2196 states and 9345 transitions. [2022-11-16 16:38:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 16:38:42,028 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2022-11-16 16:38:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:42,035 INFO L225 Difference]: With dead ends: 2196 [2022-11-16 16:38:42,035 INFO L226 Difference]: Without dead ends: 2196 [2022-11-16 16:38:42,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=516, Invalid=2906, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 16:38:42,036 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 542 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:42,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 233 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1049 Invalid, 0 Unknown, 76 Unchecked, 4.2s Time] [2022-11-16 16:38:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2022-11-16 16:38:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2027. [2022-11-16 16:38:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2022 states have (on average 4.386745796241345) internal successors, (8870), 2026 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 8870 transitions. [2022-11-16 16:38:42,080 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 8870 transitions. Word has length 14 [2022-11-16 16:38:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:42,080 INFO L495 AbstractCegarLoop]: Abstraction has 2027 states and 8870 transitions. [2022-11-16 16:38:42,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 8870 transitions. [2022-11-16 16:38:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:38:42,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:42,082 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:42,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-11-16 16:38:42,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (169)] Ended with exit code 0 [2022-11-16 16:38:42,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (170)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:42,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:42,683 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:38:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1077144445, now seen corresponding path program 2 times [2022-11-16 16:38:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982570471] [2022-11-16 16:38:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:38:42,684 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 [2022-11-16 16:38:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:42,685 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:38:42,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (172)] Waiting until timeout for monitored process [2022-11-16 16:38:43,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:38:43,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:43,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:38:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:43,301 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:43,301 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:38:43,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:38:44,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:44,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982570471] [2022-11-16 16:38:44,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982570471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:44,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483261084] [2022-11-16 16:38:44,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:38:44,983 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:44,984 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:44,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (173)] Waiting until timeout for monitored process [2022-11-16 16:38:45,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:38:45,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:38:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:38:46,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:38:46,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483261084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:46,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408489895] [2022-11-16 16:38:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:38:46,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:38:46,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:38:46,683 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:38:46,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-11-16 16:38:47,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:38:47,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:38:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:38:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:47,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:38:47,301 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:38:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:48,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:50,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408489895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:50,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:38:50,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 6, 7, 7] total 34 [2022-11-16 16:38:50,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656347182] [2022-11-16 16:38:50,244 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:38:50,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 16:38:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 16:38:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 16:38:50,246 INFO L87 Difference]: Start difference. First operand 2027 states and 8870 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:39:06,167 INFO L93 Difference]: Finished difference Result 3252 states and 13386 transitions. [2022-11-16 16:39:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 16:39:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2022-11-16 16:39:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:39:06,177 INFO L225 Difference]: With dead ends: 3252 [2022-11-16 16:39:06,177 INFO L226 Difference]: Without dead ends: 3252 [2022-11-16 16:39:06,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=846, Invalid=4124, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 16:39:06,177 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 959 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:39:06,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 366 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1733 Invalid, 0 Unknown, 735 Unchecked, 8.1s Time] [2022-11-16 16:39:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2022-11-16 16:39:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2323. [2022-11-16 16:39:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2318 states have (on average 4.3865401207937875) internal successors, (10168), 2322 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 10168 transitions. [2022-11-16 16:39:06,228 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 10168 transitions. Word has length 14 [2022-11-16 16:39:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:39:06,228 INFO L495 AbstractCegarLoop]: Abstraction has 2323 states and 10168 transitions. [2022-11-16 16:39:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 10168 transitions. [2022-11-16 16:39:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:39:06,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:39:06,230 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:39:06,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (173)] Ended with exit code 0 [2022-11-16 16:39:06,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-11-16 16:39:06,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (172)] Ended with exit code 0 [2022-11-16 16:39:06,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:39:06,831 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:39:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:39:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash -395240094, now seen corresponding path program 1 times [2022-11-16 16:39:06,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:39:06,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581454543] [2022-11-16 16:39:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:39:06,832 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 [2022-11-16 16:39:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:39:06,833 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:39:06,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (175)] Waiting until timeout for monitored process [2022-11-16 16:39:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:39:07,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:39:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:07,399 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:07,399 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:07,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:09,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:39:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581454543] [2022-11-16 16:39:09,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581454543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1496843320] [2022-11-16 16:39:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:39:09,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:39:09,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:39:09,112 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:39:09,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (176)] Waiting until timeout for monitored process [2022-11-16 16:39:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:39:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:39:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:10,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:11,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1496843320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:11,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228686092] [2022-11-16 16:39:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:39:11,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:39:11,356 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:39:11,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-11-16 16:39:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:39:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:39:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:11,956 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:11,956 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:12,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:12,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228686092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:12,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:39:12,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 28 [2022-11-16 16:39:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638520481] [2022-11-16 16:39:12,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:39:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 16:39:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:39:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 16:39:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-11-16 16:39:12,683 INFO L87 Difference]: Start difference. First operand 2323 states and 10168 transitions. Second operand has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:39:19,037 INFO L93 Difference]: Finished difference Result 3721 states and 15996 transitions. [2022-11-16 16:39:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 16:39:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2022-11-16 16:39:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:39:19,049 INFO L225 Difference]: With dead ends: 3721 [2022-11-16 16:39:19,049 INFO L226 Difference]: Without dead ends: 3721 [2022-11-16 16:39:19,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 16:39:19,050 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 331 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1534 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:39:19,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 90 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 574 Invalid, 0 Unknown, 1534 Unchecked, 3.2s Time] [2022-11-16 16:39:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-11-16 16:39:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 2499. [2022-11-16 16:39:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2494 states have (on average 4.413392141138733) internal successors, (11007), 2498 states have internal predecessors, (11007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 11007 transitions. [2022-11-16 16:39:19,108 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 11007 transitions. Word has length 14 [2022-11-16 16:39:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:39:19,108 INFO L495 AbstractCegarLoop]: Abstraction has 2499 states and 11007 transitions. [2022-11-16 16:39:19,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 11007 transitions. [2022-11-16 16:39:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:39:19,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:39:19,110 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:39:19,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-11-16 16:39:19,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (175)] Forceful destruction successful, exit code 0 [2022-11-16 16:39:19,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (176)] Forceful destruction successful, exit code 0 [2022-11-16 16:39:19,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:39:19,715 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:39:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:39:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1261721238, now seen corresponding path program 2 times [2022-11-16 16:39:19,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:39:19,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036191207] [2022-11-16 16:39:19,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:39:19,716 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 [2022-11-16 16:39:19,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:39:19,717 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:39:19,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (178)] Waiting until timeout for monitored process [2022-11-16 16:39:20,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:39:20,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:39:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:20,311 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:20,312 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:20,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:21,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:39:21,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036191207] [2022-11-16 16:39:21,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036191207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:21,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [48470448] [2022-11-16 16:39:21,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:39:21,628 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:39:21,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:39:21,631 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:39:21,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (179)] Waiting until timeout for monitored process [2022-11-16 16:39:22,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:39:22,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:39:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:22,696 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:22,697 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:23,221 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 [2022-11-16 16:39:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:23,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:24,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [48470448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:24,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581866935] [2022-11-16 16:39:24,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:39:24,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:24,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:39:24,415 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:39:24,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-11-16 16:39:24,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:39:24,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:24,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:39:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:25,031 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:25,031 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:25,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:26,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581866935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:26,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:39:26,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 8, 8, 5, 5] total 27 [2022-11-16 16:39:26,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470558395] [2022-11-16 16:39:26,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:39:26,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 16:39:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:39:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 16:39:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-11-16 16:39:26,203 INFO L87 Difference]: Start difference. First operand 2499 states and 11007 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:39:29,110 INFO L93 Difference]: Finished difference Result 2697 states and 11661 transitions. [2022-11-16 16:39:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 16:39:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-11-16 16:39:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:39:29,118 INFO L225 Difference]: With dead ends: 2697 [2022-11-16 16:39:29,118 INFO L226 Difference]: Without dead ends: 2697 [2022-11-16 16:39:29,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:39:29,119 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:39:29,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 112 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 0 Unknown, 285 Unchecked, 1.6s Time] [2022-11-16 16:39:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2022-11-16 16:39:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2518. [2022-11-16 16:39:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2513 states have (on average 4.4162355750099485) internal successors, (11098), 2517 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 11098 transitions. [2022-11-16 16:39:29,166 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 11098 transitions. Word has length 14 [2022-11-16 16:39:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:39:29,166 INFO L495 AbstractCegarLoop]: Abstraction has 2518 states and 11098 transitions. [2022-11-16 16:39:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 11098 transitions. [2022-11-16 16:39:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:39:29,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:39:29,168 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:39:29,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (179)] Ended with exit code 0 [2022-11-16 16:39:29,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (178)] Ended with exit code 0 [2022-11-16 16:39:29,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-11-16 16:39:29,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:29,769 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:39:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:39:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1260459228, now seen corresponding path program 3 times [2022-11-16 16:39:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:39:29,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667388363] [2022-11-16 16:39:29,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:39:29,770 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 [2022-11-16 16:39:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:39:29,771 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:39:29,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (181)] Waiting until timeout for monitored process [2022-11-16 16:39:30,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:39:30,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:30,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:39:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:30,344 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:30,344 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:30,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:31,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:39:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667388363] [2022-11-16 16:39:31,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667388363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774458176] [2022-11-16 16:39:31,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:39:31,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:39:31,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:39:31,532 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:39:31,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (182)] Waiting until timeout for monitored process [2022-11-16 16:39:32,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:39:32,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:39:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:32,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:33,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774458176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3446356] [2022-11-16 16:39:33,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:39:33,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:39:33,506 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:39:33,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-11-16 16:39:34,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:39:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:34,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:39:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:34,152 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:34,152 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:34,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:35,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3446356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:35,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:39:35,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:39:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962583779] [2022-11-16 16:39:35,302 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:39:35,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:39:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:39:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:39:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:39:35,303 INFO L87 Difference]: Start difference. First operand 2518 states and 11098 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:39:38,009 INFO L93 Difference]: Finished difference Result 2692 states and 11649 transitions. [2022-11-16 16:39:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 16:39:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-11-16 16:39:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:39:38,018 INFO L225 Difference]: With dead ends: 2692 [2022-11-16 16:39:38,018 INFO L226 Difference]: Without dead ends: 2692 [2022-11-16 16:39:38,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:39:38,019 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:39:38,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 57 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 158 Unchecked, 1.3s Time] [2022-11-16 16:39:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-11-16 16:39:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2515. [2022-11-16 16:39:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 2510 states have (on average 4.414342629482071) internal successors, (11080), 2514 states have internal predecessors, (11080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 11080 transitions. [2022-11-16 16:39:38,077 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 11080 transitions. Word has length 14 [2022-11-16 16:39:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:39:38,077 INFO L495 AbstractCegarLoop]: Abstraction has 2515 states and 11080 transitions. [2022-11-16 16:39:38,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 11080 transitions. [2022-11-16 16:39:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:39:38,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:39:38,081 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:39:38,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (182)] Forceful destruction successful, exit code 0 [2022-11-16 16:39:38,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (181)] Ended with exit code 0 [2022-11-16 16:39:38,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-11-16 16:39:38,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:38,694 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:39:38,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:39:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash -89103337, now seen corresponding path program 1 times [2022-11-16 16:39:38,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:39:38,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610015785] [2022-11-16 16:39:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:39:38,695 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 [2022-11-16 16:39:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:39:38,696 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:39:38,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (184)] Waiting until timeout for monitored process [2022-11-16 16:39:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:39:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:39:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:39,361 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:39,361 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:39,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:40,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:39:40,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610015785] [2022-11-16 16:39:40,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610015785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:40,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054256402] [2022-11-16 16:39:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:39:40,916 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:39:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:39:40,917 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:39:40,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (185)] Waiting until timeout for monitored process [2022-11-16 16:39:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:39:41,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:39:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:42,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:43,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054256402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782448249] [2022-11-16 16:39:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:39:43,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:43,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:39:43,188 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:39:43,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-11-16 16:39:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:39:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:39:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:43,877 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:43,877 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:44,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:44,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782448249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:44,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:39:44,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-16 16:39:44,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259962986] [2022-11-16 16:39:44,641 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:39:44,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:39:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:39:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:39:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:39:44,643 INFO L87 Difference]: Start difference. First operand 2515 states and 11080 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:39:48,782 INFO L93 Difference]: Finished difference Result 2771 states and 12005 transitions. [2022-11-16 16:39:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:39:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2022-11-16 16:39:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:39:48,791 INFO L225 Difference]: With dead ends: 2771 [2022-11-16 16:39:48,792 INFO L226 Difference]: Without dead ends: 2771 [2022-11-16 16:39:48,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:39:48,792 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:39:48,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 81 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 333 Invalid, 0 Unknown, 204 Unchecked, 1.9s Time] [2022-11-16 16:39:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-11-16 16:39:48,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2548. [2022-11-16 16:39:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2543 states have (on average 4.418010224144711) internal successors, (11235), 2547 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 11235 transitions. [2022-11-16 16:39:48,845 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 11235 transitions. Word has length 14 [2022-11-16 16:39:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:39:48,846 INFO L495 AbstractCegarLoop]: Abstraction has 2548 states and 11235 transitions. [2022-11-16 16:39:48,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 11235 transitions. [2022-11-16 16:39:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:39:48,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:39:48,848 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:39:48,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (184)] Ended with exit code 0 [2022-11-16 16:39:49,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (185)] Ended with exit code 0 [2022-11-16 16:39:49,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-11-16 16:39:49,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:49,449 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:39:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:39:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash -89176807, now seen corresponding path program 2 times [2022-11-16 16:39:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:39:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341549669] [2022-11-16 16:39:49,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:39:49,450 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 [2022-11-16 16:39:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:39:49,451 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:39:49,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (187)] Waiting until timeout for monitored process [2022-11-16 16:39:49,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:39:49,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:49,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:39:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:50,131 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:50,132 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:50,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:51,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:39:51,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341549669] [2022-11-16 16:39:51,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341549669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:51,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [216353842] [2022-11-16 16:39:51,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:39:51,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:39:51,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:39:51,496 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:39:51,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (188)] Waiting until timeout for monitored process [2022-11-16 16:39:52,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:39:52,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:39:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:53,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:39:53,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [216353842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776962666] [2022-11-16 16:39:53,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:39:53,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:39:53,643 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:39:53,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-11-16 16:39:54,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:39:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:39:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:54,355 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:54,355 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:39:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:54,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:39:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:39:55,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776962666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:39:55,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:39:55,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:39:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499959215] [2022-11-16 16:39:55,608 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:39:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:39:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:39:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:39:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:39:55,609 INFO L87 Difference]: Start difference. First operand 2548 states and 11235 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:39:58,667 INFO L93 Difference]: Finished difference Result 2875 states and 12582 transitions. [2022-11-16 16:39:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 16:39:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-11-16 16:39:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:39:58,677 INFO L225 Difference]: With dead ends: 2875 [2022-11-16 16:39:58,677 INFO L226 Difference]: Without dead ends: 2875 [2022-11-16 16:39:58,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:39:58,678 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:39:58,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 76 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 370 Unchecked, 1.7s Time] [2022-11-16 16:39:58,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-11-16 16:39:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2636. [2022-11-16 16:39:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2631 states have (on average 4.437856328392246) internal successors, (11676), 2635 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 11676 transitions. [2022-11-16 16:39:58,733 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 11676 transitions. Word has length 14 [2022-11-16 16:39:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:39:58,733 INFO L495 AbstractCegarLoop]: Abstraction has 2636 states and 11676 transitions. [2022-11-16 16:39:58,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:39:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 11676 transitions. [2022-11-16 16:39:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:39:58,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:39:58,736 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:39:58,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (188)] Ended with exit code 0 [2022-11-16 16:39:58,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (187)] Ended with exit code 0 [2022-11-16 16:39:59,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-11-16 16:39:59,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:39:59,336 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:39:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:39:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1974814795, now seen corresponding path program 3 times [2022-11-16 16:39:59,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:39:59,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769950763] [2022-11-16 16:39:59,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:39:59,337 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 [2022-11-16 16:39:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:39:59,338 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:39:59,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (190)] Waiting until timeout for monitored process [2022-11-16 16:39:59,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:39:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:39:59,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:39:59,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:39:59,947 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:39:59,947 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:00,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:01,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:40:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769950763] [2022-11-16 16:40:01,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769950763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [446305956] [2022-11-16 16:40:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:40:01,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:40:01,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:40:01,221 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:40:01,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (191)] Waiting until timeout for monitored process [2022-11-16 16:40:02,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:40:02,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:40:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:02,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:03,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [446305956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:03,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268797465] [2022-11-16 16:40:03,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:40:03,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:40:03,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:40:03,270 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:40:03,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-11-16 16:40:03,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:40:03,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:03,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:40:03,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:04,068 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:04,068 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:04,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:05,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268797465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:05,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:40:05,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:40:05,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485705940] [2022-11-16 16:40:05,275 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:40:05,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:40:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:40:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:40:05,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:40:05,276 INFO L87 Difference]: Start difference. First operand 2636 states and 11676 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:40:07,851 INFO L93 Difference]: Finished difference Result 2872 states and 12529 transitions. [2022-11-16 16:40:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:40:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2022-11-16 16:40:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:40:07,861 INFO L225 Difference]: With dead ends: 2872 [2022-11-16 16:40:07,861 INFO L226 Difference]: Without dead ends: 2872 [2022-11-16 16:40:07,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:40:07,861 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:40:07,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 89 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 216 Unchecked, 1.4s Time] [2022-11-16 16:40:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2022-11-16 16:40:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2653. [2022-11-16 16:40:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2648 states have (on average 4.436555891238671) internal successors, (11748), 2652 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 11748 transitions. [2022-11-16 16:40:07,912 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 11748 transitions. Word has length 14 [2022-11-16 16:40:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:40:07,913 INFO L495 AbstractCegarLoop]: Abstraction has 2653 states and 11748 transitions. [2022-11-16 16:40:07,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 11748 transitions. [2022-11-16 16:40:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:40:07,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:40:07,935 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:40:07,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (190)] Ended with exit code 0 [2022-11-16 16:40:08,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-11-16 16:40:08,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (191)] Ended with exit code 0 [2022-11-16 16:40:08,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:40:08,536 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:40:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:40:08,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1974741325, now seen corresponding path program 4 times [2022-11-16 16:40:08,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:40:08,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349664659] [2022-11-16 16:40:08,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:40:08,537 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 [2022-11-16 16:40:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:40:08,539 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:40:08,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (193)] Waiting until timeout for monitored process [2022-11-16 16:40:09,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:40:09,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:40:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:09,150 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:09,150 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:09,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:10,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:40:10,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349664659] [2022-11-16 16:40:10,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349664659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:10,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1851650972] [2022-11-16 16:40:10,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:40:10,670 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:40:10,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:40:10,671 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:40:10,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (194)] Waiting until timeout for monitored process [2022-11-16 16:40:11,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:40:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:40:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:12,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:12,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1851650972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459403373] [2022-11-16 16:40:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:40:12,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:40:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:40:12,846 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:40:12,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-11-16 16:40:13,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:40:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:13,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:40:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:13,498 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:13,498 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:13,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:14,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459403373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:14,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:40:14,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-16 16:40:14,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945343460] [2022-11-16 16:40:14,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:40:14,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:40:14,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:40:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:40:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:40:14,266 INFO L87 Difference]: Start difference. First operand 2653 states and 11748 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:40:17,067 INFO L93 Difference]: Finished difference Result 3682 states and 17034 transitions. [2022-11-16 16:40:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 16:40:17,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2022-11-16 16:40:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:40:17,080 INFO L225 Difference]: With dead ends: 3682 [2022-11-16 16:40:17,080 INFO L226 Difference]: Without dead ends: 3682 [2022-11-16 16:40:17,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:40:17,080 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 175 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:40:17,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 87 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 357 Unchecked, 1.6s Time] [2022-11-16 16:40:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2022-11-16 16:40:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3426. [2022-11-16 16:40:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3421 states have (on average 4.622040339082139) internal successors, (15812), 3425 states have internal predecessors, (15812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 15812 transitions. [2022-11-16 16:40:17,149 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 15812 transitions. Word has length 14 [2022-11-16 16:40:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:40:17,150 INFO L495 AbstractCegarLoop]: Abstraction has 3426 states and 15812 transitions. [2022-11-16 16:40:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 15812 transitions. [2022-11-16 16:40:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:40:17,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:40:17,152 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:40:17,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (193)] Ended with exit code 0 [2022-11-16 16:40:17,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (194)] Ended with exit code 0 [2022-11-16 16:40:17,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-11-16 16:40:17,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:40:17,753 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:40:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:40:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1975795015, now seen corresponding path program 5 times [2022-11-16 16:40:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:40:17,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059094059] [2022-11-16 16:40:17,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:40:17,754 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 [2022-11-16 16:40:17,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:40:17,755 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:40:17,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (196)] Waiting until timeout for monitored process [2022-11-16 16:40:18,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:40:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 16:40:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:18,427 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:18,427 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:19,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:20,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:40:20,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059094059] [2022-11-16 16:40:20,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059094059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:20,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [650510315] [2022-11-16 16:40:20,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:40:20,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:40:20,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:40:20,750 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:40:20,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (197)] Waiting until timeout for monitored process [2022-11-16 16:40:21,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:40:21,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:40:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:22,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:23,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [650510315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:23,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115574868] [2022-11-16 16:40:23,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:40:23,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:40:23,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:40:23,580 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:40:23,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-11-16 16:40:24,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:40:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:24,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:40:24,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:24,267 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:24,268 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115574868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:25,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:40:25,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 31 [2022-11-16 16:40:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620269563] [2022-11-16 16:40:25,377 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:40:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 16:40:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:40:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 16:40:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 16:40:25,378 INFO L87 Difference]: Start difference. First operand 3426 states and 15812 transitions. Second operand has 33 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:40:29,985 INFO L93 Difference]: Finished difference Result 4222 states and 19733 transitions. [2022-11-16 16:40:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 16:40:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-11-16 16:40:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:40:29,998 INFO L225 Difference]: With dead ends: 4222 [2022-11-16 16:40:29,998 INFO L226 Difference]: Without dead ends: 4222 [2022-11-16 16:40:29,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:40:29,999 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 119 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:40:29,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 122 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 377 Invalid, 0 Unknown, 490 Unchecked, 2.2s Time] [2022-11-16 16:40:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2022-11-16 16:40:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3855. [2022-11-16 16:40:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3850 states have (on average 4.705454545454545) internal successors, (18116), 3854 states have internal predecessors, (18116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 18116 transitions. [2022-11-16 16:40:30,083 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 18116 transitions. Word has length 14 [2022-11-16 16:40:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:40:30,083 INFO L495 AbstractCegarLoop]: Abstraction has 3855 states and 18116 transitions. [2022-11-16 16:40:30,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 18116 transitions. [2022-11-16 16:40:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:40:30,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:40:30,087 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:40:30,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:30,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (197)] Ended with exit code 0 [2022-11-16 16:40:30,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (196)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:30,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:40:30,688 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:40:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:40:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1973475595, now seen corresponding path program 6 times [2022-11-16 16:40:30,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:40:30,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086313212] [2022-11-16 16:40:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:40:30,689 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 [2022-11-16 16:40:30,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:40:30,690 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:40:30,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (199)] Waiting until timeout for monitored process [2022-11-16 16:40:31,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 16:40:31,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:40:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:31,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:31,377 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:31,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:32,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:40:32,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086313212] [2022-11-16 16:40:32,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086313212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:32,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [748928571] [2022-11-16 16:40:32,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:40:32,624 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:40:32,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:40:32,625 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:40:32,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (200)] Waiting until timeout for monitored process [2022-11-16 16:40:33,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 16:40:33,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:33,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:40:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:34,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:34,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [748928571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:34,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656199481] [2022-11-16 16:40:34,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:40:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:40:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:40:34,665 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:40:34,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-11-16 16:40:35,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 16:40:35,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:40:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:35,375 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:35,375 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:35,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:40:36,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656199481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:36,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:40:36,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:40:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728574909] [2022-11-16 16:40:36,615 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:40:36,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:40:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:40:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:40:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:40:36,616 INFO L87 Difference]: Start difference. First operand 3855 states and 18116 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:40:39,771 INFO L93 Difference]: Finished difference Result 4399 states and 20395 transitions. [2022-11-16 16:40:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:40:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2022-11-16 16:40:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:40:39,786 INFO L225 Difference]: With dead ends: 4399 [2022-11-16 16:40:39,786 INFO L226 Difference]: Without dead ends: 4399 [2022-11-16 16:40:39,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:40:39,787 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:40:39,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 80 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 329 Unchecked, 1.6s Time] [2022-11-16 16:40:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2022-11-16 16:40:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 3986. [2022-11-16 16:40:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3981 states have (on average 4.703089675960814) internal successors, (18723), 3985 states have internal predecessors, (18723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 18723 transitions. [2022-11-16 16:40:39,878 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 18723 transitions. Word has length 14 [2022-11-16 16:40:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:40:39,878 INFO L495 AbstractCegarLoop]: Abstraction has 3986 states and 18723 transitions. [2022-11-16 16:40:39,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 18723 transitions. [2022-11-16 16:40:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:40:39,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:40:39,882 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:40:39,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (199)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:40,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (200)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:40,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:40,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:40:40,483 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:40:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:40:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1262165949, now seen corresponding path program 7 times [2022-11-16 16:40:40,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:40:40,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241980681] [2022-11-16 16:40:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:40:40,484 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 [2022-11-16 16:40:40,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:40:40,485 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:40:40,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (202)] Waiting until timeout for monitored process [2022-11-16 16:40:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:40:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:40:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:41,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:41,848 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 35 treesize of output 29 [2022-11-16 16:40:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:42,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:40:42,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241980681] [2022-11-16 16:40:42,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241980681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:42,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2091933127] [2022-11-16 16:40:42,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:40:42,259 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:40:42,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:40:42,260 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:40:42,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (203)] Waiting until timeout for monitored process [2022-11-16 16:40:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:40:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:40:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:43,316 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:43,317 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:43,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:45,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2091933127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:45,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636350702] [2022-11-16 16:40:45,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:40:45,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:40:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:40:45,471 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:40:45,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-11-16 16:40:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:40:46,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:40:46,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:46,137 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:46,137 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:46,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636350702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:48,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:40:48,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 35 [2022-11-16 16:40:48,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029749009] [2022-11-16 16:40:48,469 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:40:48,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 16:40:48,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:40:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 16:40:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:40:48,470 INFO L87 Difference]: Start difference. First operand 3986 states and 18723 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:40:54,981 INFO L93 Difference]: Finished difference Result 4378 states and 19852 transitions. [2022-11-16 16:40:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 16:40:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2022-11-16 16:40:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:40:55,020 INFO L225 Difference]: With dead ends: 4378 [2022-11-16 16:40:55,021 INFO L226 Difference]: Without dead ends: 4378 [2022-11-16 16:40:55,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 16:40:55,021 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 294 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:40:55,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 183 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 863 Invalid, 0 Unknown, 189 Unchecked, 4.2s Time] [2022-11-16 16:40:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4378 states. [2022-11-16 16:40:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4378 to 4003. [2022-11-16 16:40:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 3998 states have (on average 4.699099549774887) internal successors, (18787), 4002 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 18787 transitions. [2022-11-16 16:40:55,108 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 18787 transitions. Word has length 15 [2022-11-16 16:40:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:40:55,109 INFO L495 AbstractCegarLoop]: Abstraction has 4003 states and 18787 transitions. [2022-11-16 16:40:55,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:40:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 18787 transitions. [2022-11-16 16:40:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:40:55,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:40:55,112 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:40:55,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (203)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:55,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:55,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (202)] Forceful destruction successful, exit code 0 [2022-11-16 16:40:55,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:40:55,713 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:40:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:40:55,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1051649289, now seen corresponding path program 8 times [2022-11-16 16:40:55,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:40:55,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710206349] [2022-11-16 16:40:55,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:40:55,715 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 [2022-11-16 16:40:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:40:55,716 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:40:55,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (205)] Waiting until timeout for monitored process [2022-11-16 16:40:56,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:40:56,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:56,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:40:56,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:56,388 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:40:56,388 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 16:40:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:56,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:40:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:57,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:40:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710206349] [2022-11-16 16:40:57,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710206349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:40:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235381855] [2022-11-16 16:40:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:40:57,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:40:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:40:57,891 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:40:57,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (206)] Waiting until timeout for monitored process [2022-11-16 16:40:58,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:40:58,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:40:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:40:58,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:40:59,096 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:40:59,097 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:40:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:40:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235381855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696239439] [2022-11-16 16:41:02,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:41:02,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:41:02,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:41:02,720 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:41:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-11-16 16:41:03,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:41:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:41:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:41:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:03,474 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:41:03,475 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:41:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:04,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696239439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:05,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:41:05,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 34 [2022-11-16 16:41:05,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290099734] [2022-11-16 16:41:05,838 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:41:05,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 16:41:05,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:41:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 16:41:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:41:05,839 INFO L87 Difference]: Start difference. First operand 4003 states and 18787 transitions. Second operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:41:12,411 INFO L93 Difference]: Finished difference Result 4287 states and 19634 transitions. [2022-11-16 16:41:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 16:41:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2022-11-16 16:41:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:41:12,424 INFO L225 Difference]: With dead ends: 4287 [2022-11-16 16:41:12,425 INFO L226 Difference]: Without dead ends: 4287 [2022-11-16 16:41:12,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 16:41:12,425 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 458 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:41:12,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 148 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 853 Invalid, 0 Unknown, 17 Unchecked, 5.5s Time] [2022-11-16 16:41:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4287 states. [2022-11-16 16:41:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4287 to 4001. [2022-11-16 16:41:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 3996 states have (on average 4.69944944944945) internal successors, (18779), 4000 states have internal predecessors, (18779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 18779 transitions. [2022-11-16 16:41:12,544 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 18779 transitions. Word has length 15 [2022-11-16 16:41:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:41:12,545 INFO L495 AbstractCegarLoop]: Abstraction has 4001 states and 18779 transitions. [2022-11-16 16:41:12,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 18779 transitions. [2022-11-16 16:41:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:41:12,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:41:12,549 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:41:12,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (205)] Ended with exit code 0 [2022-11-16 16:41:12,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (206)] Forceful destruction successful, exit code 0 [2022-11-16 16:41:12,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-11-16 16:41:13,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:41:13,151 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:41:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:41:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1051680909, now seen corresponding path program 9 times [2022-11-16 16:41:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:41:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535540370] [2022-11-16 16:41:13,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:41:13,152 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 [2022-11-16 16:41:13,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:41:13,153 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:41:13,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (208)] Waiting until timeout for monitored process [2022-11-16 16:41:13,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:41:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:41:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:41:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:13,825 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:41:13,825 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:41:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:14,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:15,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:41:15,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535540370] [2022-11-16 16:41:15,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535540370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:15,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1115656743] [2022-11-16 16:41:15,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:41:15,108 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:41:15,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:41:15,109 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:41:15,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (209)] Waiting until timeout for monitored process [2022-11-16 16:41:16,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:41:16,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:41:16,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:41:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:16,231 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:41:16,231 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:41:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:16,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:16,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1115656743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959045533] [2022-11-16 16:41:16,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:41:16,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:41:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:41:16,950 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:41:16,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-11-16 16:41:17,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:41:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:41:17,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:41:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:17,655 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:41:17,656 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:41:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:18,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:18,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959045533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:18,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:41:18,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 11 [2022-11-16 16:41:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194382231] [2022-11-16 16:41:18,699 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:41:18,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 16:41:18,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:41:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 16:41:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:41:18,700 INFO L87 Difference]: Start difference. First operand 4001 states and 18779 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:41:19,958 INFO L93 Difference]: Finished difference Result 4312 states and 19956 transitions. [2022-11-16 16:41:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 16:41:19,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-16 16:41:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:41:19,972 INFO L225 Difference]: With dead ends: 4312 [2022-11-16 16:41:19,972 INFO L226 Difference]: Without dead ends: 4312 [2022-11-16 16:41:19,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:41:19,972 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:41:19,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 29 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 89 Unchecked, 1.2s Time] [2022-11-16 16:41:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2022-11-16 16:41:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4010. [2022-11-16 16:41:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4005 states have (on average 4.698377028714107) internal successors, (18817), 4009 states have internal predecessors, (18817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 18817 transitions. [2022-11-16 16:41:20,099 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 18817 transitions. Word has length 15 [2022-11-16 16:41:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:41:20,099 INFO L495 AbstractCegarLoop]: Abstraction has 4010 states and 18817 transitions. [2022-11-16 16:41:20,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 18817 transitions. [2022-11-16 16:41:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:41:20,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:41:20,102 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:41:20,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (209)] Ended with exit code 0 [2022-11-16 16:41:20,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (208)] Ended with exit code 0 [2022-11-16 16:41:20,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-11-16 16:41:20,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:41:20,703 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:41:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:41:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash 601497244, now seen corresponding path program 1 times [2022-11-16 16:41:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:41:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317576837] [2022-11-16 16:41:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:41:20,704 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 [2022-11-16 16:41:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:41:20,705 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:41:20,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (211)] Waiting until timeout for monitored process [2022-11-16 16:41:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:41:21,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:41:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:21,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:21,997 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 35 treesize of output 29 [2022-11-16 16:41:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:22,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:41:22,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317576837] [2022-11-16 16:41:22,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317576837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:22,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269417080] [2022-11-16 16:41:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:41:22,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:41:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:41:22,396 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:41:22,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (212)] Waiting until timeout for monitored process [2022-11-16 16:41:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:41:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:41:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:41:23,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:41:24,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [269417080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:24,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655997708] [2022-11-16 16:41:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:41:24,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:41:24,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:41:24,840 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:41:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-11-16 16:41:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:41:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:41:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:25,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:41:25,493 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:41:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:26,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:28,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655997708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:28,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:41:28,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 38 [2022-11-16 16:41:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273396374] [2022-11-16 16:41:28,355 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:41:28,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 16:41:28,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:41:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 16:41:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:41:28,356 INFO L87 Difference]: Start difference. First operand 4010 states and 18817 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:41:35,203 INFO L93 Difference]: Finished difference Result 4199 states and 19337 transitions. [2022-11-16 16:41:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 16:41:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2022-11-16 16:41:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:41:35,217 INFO L225 Difference]: With dead ends: 4199 [2022-11-16 16:41:35,217 INFO L226 Difference]: Without dead ends: 4199 [2022-11-16 16:41:35,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=532, Invalid=3008, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 16:41:35,218 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 315 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:41:35,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 259 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1083 Invalid, 0 Unknown, 78 Unchecked, 3.8s Time] [2022-11-16 16:41:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2022-11-16 16:41:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4011. [2022-11-16 16:41:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4011 states, 4006 states have (on average 4.698202695956066) internal successors, (18821), 4010 states have internal predecessors, (18821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 18821 transitions. [2022-11-16 16:41:35,303 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 18821 transitions. Word has length 15 [2022-11-16 16:41:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:41:35,303 INFO L495 AbstractCegarLoop]: Abstraction has 4011 states and 18821 transitions. [2022-11-16 16:41:35,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:41:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 18821 transitions. [2022-11-16 16:41:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:41:35,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:41:35,307 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:41:35,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (211)] Ended with exit code 0 [2022-11-16 16:41:35,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (212)] Ended with exit code 0 [2022-11-16 16:41:35,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-11-16 16:41:35,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,213 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:41:35,907 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:41:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:41:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 408819964, now seen corresponding path program 2 times [2022-11-16 16:41:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:41:35,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849380131] [2022-11-16 16:41:35,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:41:35,908 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 [2022-11-16 16:41:35,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:41:35,909 INFO L229 MonitoredProcess]: Starting monitored process 214 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:41:35,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (214)] Waiting until timeout for monitored process [2022-11-16 16:41:36,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:41:36,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:41:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:41:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:36,585 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:41:36,585 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:41:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:36,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:41:38,160 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:41:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849380131] [2022-11-16 16:41:38,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849380131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948204908] [2022-11-16 16:41:38,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:41:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:41:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:41:38,161 INFO L229 MonitoredProcess]: Starting monitored process 215 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:41:38,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (215)] Waiting until timeout for monitored process [2022-11-16 16:41:39,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:41:39,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:41:39,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:41:39,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:41:39,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:41:39,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1948204908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882206865] [2022-11-16 16:41:39,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:41:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:41:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:41:39,994 INFO L229 MonitoredProcess]: Starting monitored process 216 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:41:39,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-11-16 16:41:40,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:41:40,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:41:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:41:40,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:41:40,690 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:41:40,690 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:41:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:41,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:41:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:41:43,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882206865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:41:43,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:41:43,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 6, 7, 7] total 33 [2022-11-16 16:41:43,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623221101] [2022-11-16 16:41:43,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:41:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 16:41:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:41:43,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 16:41:43,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 16:41:43,316 INFO L87 Difference]: Start difference. First operand 4011 states and 18821 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:42:11,379 INFO L93 Difference]: Finished difference Result 10706 states and 48107 transitions. [2022-11-16 16:42:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-16 16:42:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:42:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:42:11,411 INFO L225 Difference]: With dead ends: 10706 [2022-11-16 16:42:11,411 INFO L226 Difference]: Without dead ends: 10706 [2022-11-16 16:42:11,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=1160, Invalid=6850, Unknown=0, NotChecked=0, Total=8010 [2022-11-16 16:42:11,412 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1065 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:42:11,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 419 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2251 Invalid, 0 Unknown, 586 Unchecked, 11.5s Time] [2022-11-16 16:42:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10706 states. [2022-11-16 16:42:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10706 to 4780. [2022-11-16 16:42:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4775 states have (on average 4.698010471204189) internal successors, (22433), 4779 states have internal predecessors, (22433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 22433 transitions. [2022-11-16 16:42:11,591 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 22433 transitions. Word has length 15 [2022-11-16 16:42:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:42:11,591 INFO L495 AbstractCegarLoop]: Abstraction has 4780 states and 22433 transitions. [2022-11-16 16:42:11,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 22433 transitions. [2022-11-16 16:42:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:42:11,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:42:11,594 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:42:11,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-11-16 16:42:11,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (215)] Ended with exit code 0 [2022-11-16 16:42:12,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (214)] Forceful destruction successful, exit code 0 [2022-11-16 16:42:12,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,215 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,214 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:42:12,195 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:42:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:42:12,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1381688314, now seen corresponding path program 3 times [2022-11-16 16:42:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:42:12,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386601210] [2022-11-16 16:42:12,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:42:12,196 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 [2022-11-16 16:42:12,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:42:12,197 INFO L229 MonitoredProcess]: Starting monitored process 217 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:42:12,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (217)] Waiting until timeout for monitored process [2022-11-16 16:42:12,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:42:12,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:42:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:12,819 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:42:12,820 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:42:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:42:13,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:42:14,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:42:14,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386601210] [2022-11-16 16:42:14,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386601210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:14,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [827999795] [2022-11-16 16:42:14,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:42:14,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:42:14,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:42:14,497 INFO L229 MonitoredProcess]: Starting monitored process 218 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:42:14,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (218)] Waiting until timeout for monitored process [2022-11-16 16:42:15,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:42:15,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:15,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:42:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:15,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:42:15,635 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:42:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:42:16,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:42:16,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [827999795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:42:16,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:42:16,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 17 [2022-11-16 16:42:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194528210] [2022-11-16 16:42:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:42:16,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:42:16,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:42:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:42:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:42:16,164 INFO L87 Difference]: Start difference. First operand 4780 states and 22433 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-11-16 16:42:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:42:16,987 INFO L93 Difference]: Finished difference Result 5532 states and 25015 transitions. [2022-11-16 16:42:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:42:16,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 15 [2022-11-16 16:42:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:42:17,018 INFO L225 Difference]: With dead ends: 5532 [2022-11-16 16:42:17,018 INFO L226 Difference]: Without dead ends: 5503 [2022-11-16 16:42:17,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-11-16 16:42:17,018 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 117 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:42:17,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 5 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2022-11-16 16:42:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5503 states. [2022-11-16 16:42:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5503 to 4722. [2022-11-16 16:42:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4722 states, 4717 states have (on average 4.689845240619038) internal successors, (22122), 4721 states have internal predecessors, (22122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 22122 transitions. [2022-11-16 16:42:17,135 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 22122 transitions. Word has length 15 [2022-11-16 16:42:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:42:17,135 INFO L495 AbstractCegarLoop]: Abstraction has 4722 states and 22122 transitions. [2022-11-16 16:42:17,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-11-16 16:42:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 22122 transitions. [2022-11-16 16:42:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:42:17,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:42:17,139 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:42:17,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (218)] Ended with exit code 0 [2022-11-16 16:42:17,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (217)] Ended with exit code 0 [2022-11-16 16:42:17,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,217 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:42:17,539 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:42:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:42:17,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1382241664, now seen corresponding path program 4 times [2022-11-16 16:42:17,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:42:17,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976234161] [2022-11-16 16:42:17,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:42:17,540 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 [2022-11-16 16:42:17,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:42:17,541 INFO L229 MonitoredProcess]: Starting monitored process 219 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:42:17,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (219)] Waiting until timeout for monitored process [2022-11-16 16:42:18,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:42:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:42:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:18,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:18,864 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 35 treesize of output 29 [2022-11-16 16:42:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:19,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:42:19,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976234161] [2022-11-16 16:42:19,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976234161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:19,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1920335374] [2022-11-16 16:42:19,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:42:19,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:42:19,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:42:19,275 INFO L229 MonitoredProcess]: Starting monitored process 220 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:42:19,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (220)] Waiting until timeout for monitored process [2022-11-16 16:42:20,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:42:20,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:42:20,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:20,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:21,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1920335374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837013799] [2022-11-16 16:42:21,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:42:21,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:42:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:42:21,600 INFO L229 MonitoredProcess]: Starting monitored process 221 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:42:21,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-11-16 16:42:22,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:42:22,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:22,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:42:22,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:22,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:42:22,284 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:42:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:23,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:25,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837013799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:25,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:42:25,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 38 [2022-11-16 16:42:25,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735232548] [2022-11-16 16:42:25,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:42:25,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 16:42:25,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:42:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 16:42:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:42:25,004 INFO L87 Difference]: Start difference. First operand 4722 states and 22122 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:42:32,946 INFO L93 Difference]: Finished difference Result 5181 states and 23781 transitions. [2022-11-16 16:42:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 16:42:32,947 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2022-11-16 16:42:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:42:32,996 INFO L225 Difference]: With dead ends: 5181 [2022-11-16 16:42:32,996 INFO L226 Difference]: Without dead ends: 5181 [2022-11-16 16:42:32,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=609, Invalid=3681, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 16:42:32,997 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 341 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:42:32,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 254 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1160 Invalid, 0 Unknown, 57 Unchecked, 4.2s Time] [2022-11-16 16:42:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5181 states. [2022-11-16 16:42:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5181 to 4835. [2022-11-16 16:42:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4830 states have (on average 4.68343685300207) internal successors, (22621), 4834 states have internal predecessors, (22621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 22621 transitions. [2022-11-16 16:42:33,134 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 22621 transitions. Word has length 15 [2022-11-16 16:42:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:42:33,134 INFO L495 AbstractCegarLoop]: Abstraction has 4835 states and 22621 transitions. [2022-11-16 16:42:33,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 22621 transitions. [2022-11-16 16:42:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:42:33,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:42:33,140 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:42:33,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-11-16 16:42:33,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (220)] Ended with exit code 0 [2022-11-16 16:42:33,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (219)] Ended with exit code 0 [2022-11-16 16:42:33,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,220 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,219 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:42:33,749 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:42:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:42:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -722965460, now seen corresponding path program 5 times [2022-11-16 16:42:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:42:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651652183] [2022-11-16 16:42:33,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:42:33,750 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 [2022-11-16 16:42:33,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:42:33,751 INFO L229 MonitoredProcess]: Starting monitored process 222 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:42:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (222)] Waiting until timeout for monitored process [2022-11-16 16:42:34,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 16:42:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:42:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:34,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:35,063 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 35 treesize of output 29 [2022-11-16 16:42:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:35,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:42:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651652183] [2022-11-16 16:42:35,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651652183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639825590] [2022-11-16 16:42:35,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:42:35,456 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:42:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:42:35,457 INFO L229 MonitoredProcess]: Starting monitored process 223 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:42:35,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (223)] Waiting until timeout for monitored process [2022-11-16 16:42:36,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 16:42:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:42:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:42:37,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:42:38,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639825590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:38,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481108411] [2022-11-16 16:42:38,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:42:38,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:42:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:42:38,006 INFO L229 MonitoredProcess]: Starting monitored process 224 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:42:38,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-11-16 16:42:38,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 16:42:38,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:38,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:42:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:38,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:42:38,884 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:42:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:39,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:42:41,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481108411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:41,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:42:41,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 38 [2022-11-16 16:42:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096272241] [2022-11-16 16:42:41,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:42:41,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 16:42:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:42:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 16:42:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:42:41,596 INFO L87 Difference]: Start difference. First operand 4835 states and 22621 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:42:55,644 INFO L93 Difference]: Finished difference Result 8193 states and 37971 transitions. [2022-11-16 16:42:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 16:42:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:42:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:42:55,675 INFO L225 Difference]: With dead ends: 8193 [2022-11-16 16:42:55,676 INFO L226 Difference]: Without dead ends: 8193 [2022-11-16 16:42:55,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=750, Invalid=4800, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 16:42:55,677 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 530 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 2993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1058 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:42:55,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 385 Invalid, 2993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1919 Invalid, 0 Unknown, 1058 Unchecked, 8.3s Time] [2022-11-16 16:42:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2022-11-16 16:42:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 4980. [2022-11-16 16:42:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4975 states have (on average 4.732462311557789) internal successors, (23544), 4979 states have internal predecessors, (23544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 23544 transitions. [2022-11-16 16:42:55,895 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 23544 transitions. Word has length 15 [2022-11-16 16:42:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:42:55,895 INFO L495 AbstractCegarLoop]: Abstraction has 4980 states and 23544 transitions. [2022-11-16 16:42:55,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:42:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 23544 transitions. [2022-11-16 16:42:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:42:55,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:42:55,900 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:42:55,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-11-16 16:42:56,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (222)] Ended with exit code 0 [2022-11-16 16:42:56,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (223)] Forceful destruction successful, exit code 0 [2022-11-16 16:42:56,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,222 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,223 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:42:56,510 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:42:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:42:56,510 INFO L85 PathProgramCache]: Analyzing trace with hash -861569892, now seen corresponding path program 6 times [2022-11-16 16:42:56,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:42:56,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095410967] [2022-11-16 16:42:56,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:42:56,511 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 [2022-11-16 16:42:56,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:42:56,512 INFO L229 MonitoredProcess]: Starting monitored process 225 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:42:56,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (225)] Waiting until timeout for monitored process [2022-11-16 16:42:57,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 16:42:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:57,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:42:57,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:42:57,215 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:42:57,215 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:42:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:42:57,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:42:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:42:58,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:42:58,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095410967] [2022-11-16 16:42:58,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095410967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:42:58,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027751182] [2022-11-16 16:42:58,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:42:58,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:42:58,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:42:58,845 INFO L229 MonitoredProcess]: Starting monitored process 226 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:42:58,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (226)] Waiting until timeout for monitored process [2022-11-16 16:42:59,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 16:42:59,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:42:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:42:59,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:43:00,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:43:01,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027751182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:01,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926504346] [2022-11-16 16:43:01,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:43:01,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:43:01,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:43:01,094 INFO L229 MonitoredProcess]: Starting monitored process 227 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:43:01,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-11-16 16:43:01,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 16:43:01,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:43:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:43:01,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:01,929 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:01,929 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:43:02,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:43:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926504346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:43:02,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:43:02,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 7, 7] total 30 [2022-11-16 16:43:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738295274] [2022-11-16 16:43:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:43:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:43:02,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:43:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:43:02,587 INFO L87 Difference]: Start difference. First operand 4980 states and 23544 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-11-16 16:43:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:03,457 INFO L93 Difference]: Finished difference Result 5865 states and 26440 transitions. [2022-11-16 16:43:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:43:03,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 15 [2022-11-16 16:43:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:03,475 INFO L225 Difference]: With dead ends: 5865 [2022-11-16 16:43:03,475 INFO L226 Difference]: Without dead ends: 5865 [2022-11-16 16:43:03,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 16:43:03,475 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 104 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:03,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 54 Unchecked, 0.5s Time] [2022-11-16 16:43:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2022-11-16 16:43:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 5007. [2022-11-16 16:43:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5002 states have (on average 4.724910035985606) internal successors, (23634), 5006 states have internal predecessors, (23634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 23634 transitions. [2022-11-16 16:43:03,578 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 23634 transitions. Word has length 15 [2022-11-16 16:43:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:03,579 INFO L495 AbstractCegarLoop]: Abstraction has 5007 states and 23634 transitions. [2022-11-16 16:43:03,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-11-16 16:43:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 23634 transitions. [2022-11-16 16:43:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:03,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:03,582 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:03,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (225)] Ended with exit code 0 [2022-11-16 16:43:03,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (226)] Ended with exit code 0 [2022-11-16 16:43:03,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:04,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,226 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,227 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:43:04,182 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash -861079782, now seen corresponding path program 7 times [2022-11-16 16:43:04,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:04,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457236288] [2022-11-16 16:43:04,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:43:04,183 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 [2022-11-16 16:43:04,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:04,184 INFO L229 MonitoredProcess]: Starting monitored process 228 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:04,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (228)] Waiting until timeout for monitored process [2022-11-16 16:43:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:04,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:43:04,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:04,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:05,491 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 35 treesize of output 29 [2022-11-16 16:43:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:05,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:43:05,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457236288] [2022-11-16 16:43:05,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457236288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:05,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52183651] [2022-11-16 16:43:05,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:43:05,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:43:05,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:43:05,880 INFO L229 MonitoredProcess]: Starting monitored process 229 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:43:05,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (229)] Waiting until timeout for monitored process [2022-11-16 16:43:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:06,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:43:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:07,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52183651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500837904] [2022-11-16 16:43:08,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:43:08,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:43:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:43:08,204 INFO L229 MonitoredProcess]: Starting monitored process 230 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:43:08,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-11-16 16:43:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:43:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:08,947 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:08,947 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:09,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:11,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500837904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:11,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:43:11,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 38 [2022-11-16 16:43:11,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846108311] [2022-11-16 16:43:11,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:43:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 16:43:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 16:43:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:43:11,631 INFO L87 Difference]: Start difference. First operand 5007 states and 23634 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:23,125 INFO L93 Difference]: Finished difference Result 7038 states and 31963 transitions. [2022-11-16 16:43:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 16:43:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 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 [2022-11-16 16:43:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:23,147 INFO L225 Difference]: With dead ends: 7038 [2022-11-16 16:43:23,147 INFO L226 Difference]: Without dead ends: 7038 [2022-11-16 16:43:23,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=739, Invalid=4663, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 16:43:23,147 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 701 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:23,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 323 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1520 Invalid, 0 Unknown, 670 Unchecked, 6.2s Time] [2022-11-16 16:43:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2022-11-16 16:43:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 5091. [2022-11-16 16:43:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5091 states, 5086 states have (on average 4.724341329138812) internal successors, (24028), 5090 states have internal predecessors, (24028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5091 states to 5091 states and 24028 transitions. [2022-11-16 16:43:23,295 INFO L78 Accepts]: Start accepts. Automaton has 5091 states and 24028 transitions. Word has length 15 [2022-11-16 16:43:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:23,295 INFO L495 AbstractCegarLoop]: Abstraction has 5091 states and 24028 transitions. [2022-11-16 16:43:23,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5091 states and 24028 transitions. [2022-11-16 16:43:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:23,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:23,299 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:23,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (228)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:23,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (229)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:23,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-11-16 16:43:23,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,229 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,230 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:43:23,900 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash 586159620, now seen corresponding path program 1 times [2022-11-16 16:43:23,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:23,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459694652] [2022-11-16 16:43:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:43:23,901 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 [2022-11-16 16:43:23,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:23,901 INFO L229 MonitoredProcess]: Starting monitored process 231 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:23,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (231)] Waiting until timeout for monitored process [2022-11-16 16:43:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:43:24,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:43:24,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:24,805 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 [2022-11-16 16:43:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:43:24,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:43:24,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459694652] [2022-11-16 16:43:24,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459694652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:24,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [413508129] [2022-11-16 16:43:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:43:24,988 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:43:24,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:43:24,988 INFO L229 MonitoredProcess]: Starting monitored process 232 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:43:24,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (232)] Waiting until timeout for monitored process [2022-11-16 16:43:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:25,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:43:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:26,052 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:26,053 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:43:26,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:43:27,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [413508129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:27,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110911318] [2022-11-16 16:43:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:43:27,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:43:27,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:43:27,357 INFO L229 MonitoredProcess]: Starting monitored process 233 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:43:27,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-11-16 16:43:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:43:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:28,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 37 [2022-11-16 16:43:28,183 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 7 treesize of output 5 [2022-11-16 16:43:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:43:28,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:29,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:43:29,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 261 treesize of output 119 [2022-11-16 16:43:29,219 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 135 treesize of output 131 [2022-11-16 16:43:29,230 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 117 treesize of output 115 [2022-11-16 16:43:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:43:32,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110911318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:32,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:43:32,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 4, 4] total 28 [2022-11-16 16:43:32,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818769419] [2022-11-16 16:43:32,900 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:43:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 16:43:32,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 16:43:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-11-16 16:43:32,901 INFO L87 Difference]: Start difference. First operand 5091 states and 24028 transitions. Second operand has 30 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:42,902 INFO L93 Difference]: Finished difference Result 13889 states and 65295 transitions. [2022-11-16 16:43:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 16:43:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:43:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:42,955 INFO L225 Difference]: With dead ends: 13889 [2022-11-16 16:43:42,956 INFO L226 Difference]: Without dead ends: 13889 [2022-11-16 16:43:42,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 16:43:42,956 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1206 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:42,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 168 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 791 Invalid, 0 Unknown, 651 Unchecked, 3.4s Time] [2022-11-16 16:43:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-11-16 16:43:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 5371. [2022-11-16 16:43:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5371 states, 5366 states have (on average 4.720648527767424) internal successors, (25331), 5370 states have internal predecessors, (25331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5371 states to 5371 states and 25331 transitions. [2022-11-16 16:43:43,219 INFO L78 Accepts]: Start accepts. Automaton has 5371 states and 25331 transitions. Word has length 15 [2022-11-16 16:43:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:43,219 INFO L495 AbstractCegarLoop]: Abstraction has 5371 states and 25331 transitions. [2022-11-16 16:43:43,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5371 states and 25331 transitions. [2022-11-16 16:43:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:43,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:43,223 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:43,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (232)] Ended with exit code 0 [2022-11-16 16:43:43,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (231)] Ended with exit code 0 [2022-11-16 16:43:43,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-11-16 16:43:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,231 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,233 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:43:43,824 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 586150010, now seen corresponding path program 1 times [2022-11-16 16:43:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:43,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724706474] [2022-11-16 16:43:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:43:43,825 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 [2022-11-16 16:43:43,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:43,826 INFO L229 MonitoredProcess]: Starting monitored process 234 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:43,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (234)] Waiting until timeout for monitored process [2022-11-16 16:43:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:43:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:43:44,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:44,758 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 [2022-11-16 16:43:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:43:44,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:43:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724706474] [2022-11-16 16:43:44,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724706474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1684851473] [2022-11-16 16:43:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:43:44,940 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:43:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:43:44,943 INFO L229 MonitoredProcess]: Starting monitored process 235 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:43:44,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (235)] Waiting until timeout for monitored process [2022-11-16 16:43:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:45,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:43:45,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:46,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:46,048 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:46,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:43:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:43:47,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1684851473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:43:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514806949] [2022-11-16 16:43:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:43:47,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:43:47,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:43:47,508 INFO L229 MonitoredProcess]: Starting monitored process 236 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:43:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-11-16 16:43:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:43:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:43:48,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:48,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 37 [2022-11-16 16:43:48,424 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 7 treesize of output 5 [2022-11-16 16:43:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:43:49,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:43:49,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514806949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:43:49,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:43:49,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 6, 6] total 24 [2022-11-16 16:43:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464020818] [2022-11-16 16:43:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:43:49,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:43:49,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:43:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:43:49,023 INFO L87 Difference]: Start difference. First operand 5371 states and 25331 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 16:43:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:49,755 INFO L93 Difference]: Finished difference Result 9160 states and 43925 transitions. [2022-11-16 16:43:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:43:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 15 [2022-11-16 16:43:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:49,800 INFO L225 Difference]: With dead ends: 9160 [2022-11-16 16:43:49,800 INFO L226 Difference]: Without dead ends: 9160 [2022-11-16 16:43:49,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-11-16 16:43:49,801 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:49,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-11-16 16:43:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2022-11-16 16:43:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 5372. [2022-11-16 16:43:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5372 states, 5367 states have (on average 4.720514253773057) internal successors, (25335), 5371 states have internal predecessors, (25335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5372 states to 5372 states and 25335 transitions. [2022-11-16 16:43:50,014 INFO L78 Accepts]: Start accepts. Automaton has 5372 states and 25335 transitions. Word has length 15 [2022-11-16 16:43:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:50,014 INFO L495 AbstractCegarLoop]: Abstraction has 5372 states and 25335 transitions. [2022-11-16 16:43:50,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 16:43:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5372 states and 25335 transitions. [2022-11-16 16:43:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:50,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:50,019 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:50,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:50,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (234)] Ended with exit code 0 [2022-11-16 16:43:50,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (235)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:50,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,234 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,235 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:43:50,620 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash 577812870, now seen corresponding path program 2 times [2022-11-16 16:43:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:50,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772549623] [2022-11-16 16:43:50,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:43:50,621 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 [2022-11-16 16:43:50,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:50,622 INFO L229 MonitoredProcess]: Starting monitored process 237 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:50,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (237)] Waiting until timeout for monitored process [2022-11-16 16:43:51,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:43:51,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:43:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:43:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:51,278 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:51,278 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:43:51,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:43:51,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:43:51,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772549623] [2022-11-16 16:43:51,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772549623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:43:51,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:43:51,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:43:51,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99605533] [2022-11-16 16:43:51,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:43:51,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:43:51,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:43:51,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:43:51,575 INFO L87 Difference]: Start difference. First operand 5372 states and 25335 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2022-11-16 16:43:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:51,791 INFO L93 Difference]: Finished difference Result 5480 states and 25953 transitions. [2022-11-16 16:43:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:43:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 15 [2022-11-16 16:43:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:51,811 INFO L225 Difference]: With dead ends: 5480 [2022-11-16 16:43:51,812 INFO L226 Difference]: Without dead ends: 5480 [2022-11-16 16:43:51,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:43:51,812 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:51,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:43:51,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-11-16 16:43:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 5398. [2022-11-16 16:43:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5398 states, 5393 states have (on average 4.727795290190988) internal successors, (25497), 5397 states have internal predecessors, (25497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5398 states to 5398 states and 25497 transitions. [2022-11-16 16:43:51,984 INFO L78 Accepts]: Start accepts. Automaton has 5398 states and 25497 transitions. Word has length 15 [2022-11-16 16:43:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:51,984 INFO L495 AbstractCegarLoop]: Abstraction has 5398 states and 25497 transitions. [2022-11-16 16:43:51,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2022-11-16 16:43:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5398 states and 25497 transitions. [2022-11-16 16:43:51,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:51,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:51,988 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:51,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (237)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:52,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:43:52,189 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:52,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash 577812560, now seen corresponding path program 2 times [2022-11-16 16:43:52,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:52,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821755707] [2022-11-16 16:43:52,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:43:52,190 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 [2022-11-16 16:43:52,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:52,191 INFO L229 MonitoredProcess]: Starting monitored process 238 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:52,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (238)] Waiting until timeout for monitored process [2022-11-16 16:43:52,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:43:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:43:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:43:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:52,839 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:52,839 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:53,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 37 [2022-11-16 16:43:53,433 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 7 treesize of output 5 [2022-11-16 16:43:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:43:53,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:43:53,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:43:53,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821755707] [2022-11-16 16:43:53,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821755707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:43:53,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:43:53,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:43:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710137644] [2022-11-16 16:43:53,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:43:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:43:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:43:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:43:53,521 INFO L87 Difference]: Start difference. First operand 5398 states and 25497 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2022-11-16 16:43:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:54,518 INFO L93 Difference]: Finished difference Result 8538 states and 40709 transitions. [2022-11-16 16:43:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:43:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 15 [2022-11-16 16:43:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:54,548 INFO L225 Difference]: With dead ends: 8538 [2022-11-16 16:43:54,548 INFO L226 Difference]: Without dead ends: 8538 [2022-11-16 16:43:54,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:43:54,549 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 107 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:54,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 16 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2022-11-16 16:43:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8538 states. [2022-11-16 16:43:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8538 to 5415. [2022-11-16 16:43:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5415 states, 5410 states have (on average 4.731238447319778) internal successors, (25596), 5414 states have internal predecessors, (25596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5415 states to 5415 states and 25596 transitions. [2022-11-16 16:43:54,692 INFO L78 Accepts]: Start accepts. Automaton has 5415 states and 25596 transitions. Word has length 15 [2022-11-16 16:43:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:54,692 INFO L495 AbstractCegarLoop]: Abstraction has 5415 states and 25596 transitions. [2022-11-16 16:43:54,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2022-11-16 16:43:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5415 states and 25596 transitions. [2022-11-16 16:43:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:54,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:54,696 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:54,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (238)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:54,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:43:54,897 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 557257080, now seen corresponding path program 3 times [2022-11-16 16:43:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:54,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703037942] [2022-11-16 16:43:54,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:43:54,897 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 [2022-11-16 16:43:54,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:54,898 INFO L229 MonitoredProcess]: Starting monitored process 239 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:54,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (239)] Waiting until timeout for monitored process [2022-11-16 16:43:55,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:43:55,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:43:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:43:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:55,550 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:55,550 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:43:55,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:43:55,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:43:55,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703037942] [2022-11-16 16:43:55,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703037942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:43:55,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:43:55,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:43:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422978570] [2022-11-16 16:43:55,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:43:55,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:43:55,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:43:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:43:55,849 INFO L87 Difference]: Start difference. First operand 5415 states and 25596 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2022-11-16 16:43:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:56,129 INFO L93 Difference]: Finished difference Result 5483 states and 25966 transitions. [2022-11-16 16:43:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:43:56,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 15 [2022-11-16 16:43:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:56,188 INFO L225 Difference]: With dead ends: 5483 [2022-11-16 16:43:56,188 INFO L226 Difference]: Without dead ends: 5483 [2022-11-16 16:43:56,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:43:56,189 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:56,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-16 16:43:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2022-11-16 16:43:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5403. [2022-11-16 16:43:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5398 states have (on average 4.727676917376806) internal successors, (25520), 5402 states have internal predecessors, (25520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 25520 transitions. [2022-11-16 16:43:56,434 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 25520 transitions. Word has length 15 [2022-11-16 16:43:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:56,435 INFO L495 AbstractCegarLoop]: Abstraction has 5403 states and 25520 transitions. [2022-11-16 16:43:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2022-11-16 16:43:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 25520 transitions. [2022-11-16 16:43:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:56,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:56,443 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:56,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (239)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:43:56,656 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 557256770, now seen corresponding path program 3 times [2022-11-16 16:43:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:56,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325063379] [2022-11-16 16:43:56,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:43:56,657 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 [2022-11-16 16:43:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:56,658 INFO L229 MonitoredProcess]: Starting monitored process 240 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:56,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (240)] Waiting until timeout for monitored process [2022-11-16 16:43:57,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:43:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:43:57,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:43:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:43:57,322 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:43:57,322 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:43:57,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 37 [2022-11-16 16:43:57,939 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 7 treesize of output 5 [2022-11-16 16:43:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:43:58,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:43:58,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:43:58,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325063379] [2022-11-16 16:43:58,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325063379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:43:58,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:43:58,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:43:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837302071] [2022-11-16 16:43:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:43:58,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:43:58,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:43:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:43:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:43:58,038 INFO L87 Difference]: Start difference. First operand 5403 states and 25520 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2022-11-16 16:43:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:43:59,099 INFO L93 Difference]: Finished difference Result 10491 states and 49146 transitions. [2022-11-16 16:43:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:43:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 15 [2022-11-16 16:43:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:43:59,172 INFO L225 Difference]: With dead ends: 10491 [2022-11-16 16:43:59,172 INFO L226 Difference]: Without dead ends: 10491 [2022-11-16 16:43:59,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:43:59,173 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 141 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:43:59,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 16 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 104 Unchecked, 0.8s Time] [2022-11-16 16:43:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2022-11-16 16:43:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 5261. [2022-11-16 16:43:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5256 states have (on average 4.722412480974125) internal successors, (24821), 5260 states have internal predecessors, (24821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:43:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 24821 transitions. [2022-11-16 16:43:59,497 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 24821 transitions. Word has length 15 [2022-11-16 16:43:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:43:59,498 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 24821 transitions. [2022-11-16 16:43:59,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2022-11-16 16:43:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 24821 transitions. [2022-11-16 16:43:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:43:59,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:43:59,504 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:43:59,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (240)] Forceful destruction successful, exit code 0 [2022-11-16 16:43:59,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:43:59,717 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:43:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:43:59,717 INFO L85 PathProgramCache]: Analyzing trace with hash 673612077, now seen corresponding path program 1 times [2022-11-16 16:43:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:43:59,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845004843] [2022-11-16 16:43:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:43:59,718 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 [2022-11-16 16:43:59,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:43:59,718 INFO L229 MonitoredProcess]: Starting monitored process 241 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:43:59,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (241)] Waiting until timeout for monitored process [2022-11-16 16:44:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:44:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:44:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:00,393 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:44:00,393 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:44:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:00,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:02,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:44:02,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845004843] [2022-11-16 16:44:02,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845004843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:02,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [407940610] [2022-11-16 16:44:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:44:02,162 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:44:02,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:44:02,163 INFO L229 MonitoredProcess]: Starting monitored process 242 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:44:02,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (242)] Waiting until timeout for monitored process [2022-11-16 16:44:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:44:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:44:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:44:03,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:44:04,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [407940610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594176617] [2022-11-16 16:44:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:44:04,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:44:04,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:44:04,600 INFO L229 MonitoredProcess]: Starting monitored process 243 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:44:04,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-11-16 16:44:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:44:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:44:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:05,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:06,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594176617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:06,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:44:06,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 9] total 37 [2022-11-16 16:44:06,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413286550] [2022-11-16 16:44:06,545 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:44:06,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 16:44:06,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:44:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 16:44:06,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 16:44:06,546 INFO L87 Difference]: Start difference. First operand 5261 states and 24821 transitions. Second operand has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:44:19,719 INFO L93 Difference]: Finished difference Result 7198 states and 31645 transitions. [2022-11-16 16:44:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 16:44:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 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 [2022-11-16 16:44:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:44:19,759 INFO L225 Difference]: With dead ends: 7198 [2022-11-16 16:44:19,759 INFO L226 Difference]: Without dead ends: 7198 [2022-11-16 16:44:19,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=906, Invalid=4946, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 16:44:19,761 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 602 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 941 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:44:19,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 97 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1133 Invalid, 0 Unknown, 941 Unchecked, 6.1s Time] [2022-11-16 16:44:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7198 states. [2022-11-16 16:44:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7198 to 5332. [2022-11-16 16:44:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5327 states have (on average 4.7005819410550025) internal successors, (25040), 5331 states have internal predecessors, (25040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 25040 transitions. [2022-11-16 16:44:19,981 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 25040 transitions. Word has length 15 [2022-11-16 16:44:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:44:19,981 INFO L495 AbstractCegarLoop]: Abstraction has 5332 states and 25040 transitions. [2022-11-16 16:44:19,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 25040 transitions. [2022-11-16 16:44:19,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:44:19,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:44:19,987 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:44:20,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (241)] Ended with exit code 0 [2022-11-16 16:44:20,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-11-16 16:44:20,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (242)] Forceful destruction successful, exit code 0 [2022-11-16 16:44:20,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,243 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,242 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:44:20,602 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:44:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:44:20,602 INFO L85 PathProgramCache]: Analyzing trace with hash 631905851, now seen corresponding path program 2 times [2022-11-16 16:44:20,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:44:20,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058483575] [2022-11-16 16:44:20,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:44:20,603 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 [2022-11-16 16:44:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:44:20,603 INFO L229 MonitoredProcess]: Starting monitored process 244 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:44:20,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (244)] Waiting until timeout for monitored process [2022-11-16 16:44:21,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:44:21,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:44:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:44:21,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:21,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:44:21,358 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:44:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:21,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:22,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:44:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058483575] [2022-11-16 16:44:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058483575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963010485] [2022-11-16 16:44:22,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:44:22,659 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:44:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:44:22,660 INFO L229 MonitoredProcess]: Starting monitored process 245 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:44:22,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (245)] Waiting until timeout for monitored process [2022-11-16 16:44:23,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:44:23,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:44:23,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 16:44:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:23,883 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:44:23,883 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:44:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:44:24,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:44:26,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963010485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768993827] [2022-11-16 16:44:26,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:44:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:44:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:44:26,006 INFO L229 MonitoredProcess]: Starting monitored process 246 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:44:26,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-11-16 16:44:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:44:26,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:44:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:44:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:27,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:29,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768993827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:29,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:44:29,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 6, 9, 9] total 37 [2022-11-16 16:44:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568864920] [2022-11-16 16:44:29,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:44:29,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 16:44:29,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:44:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 16:44:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 16:44:29,273 INFO L87 Difference]: Start difference. First operand 5332 states and 25040 transitions. Second operand has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:44:36,303 INFO L93 Difference]: Finished difference Result 5581 states and 25916 transitions. [2022-11-16 16:44:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 16:44:36,305 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2022-11-16 16:44:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:44:36,329 INFO L225 Difference]: With dead ends: 5581 [2022-11-16 16:44:36,329 INFO L226 Difference]: Without dead ends: 5581 [2022-11-16 16:44:36,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=652, Invalid=3508, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 16:44:36,330 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:44:36,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 144 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 374 Invalid, 0 Unknown, 215 Unchecked, 2.0s Time] [2022-11-16 16:44:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5581 states. [2022-11-16 16:44:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5581 to 5372. [2022-11-16 16:44:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5372 states, 5367 states have (on average 4.69834171790572) internal successors, (25216), 5371 states have internal predecessors, (25216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5372 states to 5372 states and 25216 transitions. [2022-11-16 16:44:36,521 INFO L78 Accepts]: Start accepts. Automaton has 5372 states and 25216 transitions. Word has length 15 [2022-11-16 16:44:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:44:36,522 INFO L495 AbstractCegarLoop]: Abstraction has 5372 states and 25216 transitions. [2022-11-16 16:44:36,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5372 states and 25216 transitions. [2022-11-16 16:44:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:44:36,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:44:36,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:44:36,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-11-16 16:44:36,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (244)] Ended with exit code 0 [2022-11-16 16:44:36,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (245)] Forceful destruction successful, exit code 0 [2022-11-16 16:44:37,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,244 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,245 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:44:37,138 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:44:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:44:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash 632459201, now seen corresponding path program 3 times [2022-11-16 16:44:37,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:44:37,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548148314] [2022-11-16 16:44:37,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:44:37,139 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 [2022-11-16 16:44:37,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:44:37,141 INFO L229 MonitoredProcess]: Starting monitored process 247 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:44:37,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (247)] Waiting until timeout for monitored process [2022-11-16 16:44:37,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:44:37,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:44:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:44:37,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:37,861 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:44:37,862 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:44:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:38,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:39,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:44:39,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548148314] [2022-11-16 16:44:39,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548148314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:39,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943692048] [2022-11-16 16:44:39,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:44:39,218 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:44:39,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:44:39,219 INFO L229 MonitoredProcess]: Starting monitored process 248 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:44:39,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (248)] Waiting until timeout for monitored process [2022-11-16 16:44:40,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:44:40,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:44:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:44:40,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:44:40,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:44:41,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943692048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:41,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92339745] [2022-11-16 16:44:41,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:44:41,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:44:41,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:44:41,495 INFO L229 MonitoredProcess]: Starting monitored process 249 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:44:41,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-11-16 16:44:42,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:44:42,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:44:42,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:44:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:43,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:44,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92339745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:44,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:44:44,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 9, 9] total 37 [2022-11-16 16:44:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141947871] [2022-11-16 16:44:44,685 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:44:44,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 16:44:44,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:44:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 16:44:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 16:44:44,686 INFO L87 Difference]: Start difference. First operand 5372 states and 25216 transitions. Second operand has 38 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:44:51,966 INFO L93 Difference]: Finished difference Result 5600 states and 25993 transitions. [2022-11-16 16:44:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 16:44:51,967 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2022-11-16 16:44:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:44:51,987 INFO L225 Difference]: With dead ends: 5600 [2022-11-16 16:44:51,988 INFO L226 Difference]: Without dead ends: 5600 [2022-11-16 16:44:51,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=712, Invalid=3980, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 16:44:51,988 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:44:51,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 60 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 359 Invalid, 0 Unknown, 151 Unchecked, 2.0s Time] [2022-11-16 16:44:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2022-11-16 16:44:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 5381. [2022-11-16 16:44:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 5376 states have (on average 4.701450892857143) internal successors, (25275), 5380 states have internal predecessors, (25275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 25275 transitions. [2022-11-16 16:44:52,127 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 25275 transitions. Word has length 15 [2022-11-16 16:44:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:44:52,127 INFO L495 AbstractCegarLoop]: Abstraction has 5381 states and 25275 transitions. [2022-11-16 16:44:52,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:44:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 25275 transitions. [2022-11-16 16:44:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:44:52,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:44:52,131 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:44:52,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (248)] Forceful destruction successful, exit code 0 [2022-11-16 16:44:52,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-11-16 16:44:52,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (247)] Ended with exit code 0 [2022-11-16 16:44:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,249 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,247 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 [2022-11-16 16:44:52,733 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:44:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:44:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1644129767, now seen corresponding path program 1 times [2022-11-16 16:44:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:44:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110304177] [2022-11-16 16:44:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:44:52,734 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 [2022-11-16 16:44:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:44:52,735 INFO L229 MonitoredProcess]: Starting monitored process 250 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:44:52,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (250)] Waiting until timeout for monitored process [2022-11-16 16:44:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:44:53,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:44:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:53,571 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:44:53,571 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:44:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:54,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:44:55,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:44:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110304177] [2022-11-16 16:44:55,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110304177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1771691349] [2022-11-16 16:44:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:44:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:44:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:44:55,831 INFO L229 MonitoredProcess]: Starting monitored process 251 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:44:55,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (251)] Waiting until timeout for monitored process [2022-11-16 16:44:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:44:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:44:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:44:57,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:44:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:44:58,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1771691349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:44:58,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124420125] [2022-11-16 16:44:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:44:58,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:44:58,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:44:58,804 INFO L229 MonitoredProcess]: Starting monitored process 252 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:44:58,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-11-16 16:44:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:44:59,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:44:59,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:44:59,714 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:44:59,715 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:45:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:00,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:45:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:00,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124420125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:45:00,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:45:00,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 28 [2022-11-16 16:45:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755843013] [2022-11-16 16:45:00,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:45:00,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 16:45:00,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:45:00,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 16:45:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-11-16 16:45:00,618 INFO L87 Difference]: Start difference. First operand 5381 states and 25275 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:45:15,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:45:15,366 INFO L93 Difference]: Finished difference Result 7953 states and 36623 transitions. [2022-11-16 16:45:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 16:45:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2022-11-16 16:45:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:45:15,402 INFO L225 Difference]: With dead ends: 7953 [2022-11-16 16:45:15,402 INFO L226 Difference]: Without dead ends: 7953 [2022-11-16 16:45:15,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=892, Invalid=3800, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 16:45:15,403 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 239 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1084 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:45:15,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 103 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 842 Invalid, 0 Unknown, 1084 Unchecked, 6.3s Time] [2022-11-16 16:45:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2022-11-16 16:45:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 5757. [2022-11-16 16:45:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5757 states, 5752 states have (on average 4.723748261474269) internal successors, (27171), 5756 states have internal predecessors, (27171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:45:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5757 states to 5757 states and 27171 transitions. [2022-11-16 16:45:15,549 INFO L78 Accepts]: Start accepts. Automaton has 5757 states and 27171 transitions. Word has length 15 [2022-11-16 16:45:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:45:15,549 INFO L495 AbstractCegarLoop]: Abstraction has 5757 states and 27171 transitions. [2022-11-16 16:45:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:45:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5757 states and 27171 transitions. [2022-11-16 16:45:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:45:15,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:45:15,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:45:15,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (251)] Forceful destruction successful, exit code 0 [2022-11-16 16:45:15,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (250)] Forceful destruction successful, exit code 0 [2022-11-16 16:45:15,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-11-16 16:45:16,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,250 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,252 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:45:16,154 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:45:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:45:16,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1645391777, now seen corresponding path program 2 times [2022-11-16 16:45:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:45:16,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789832930] [2022-11-16 16:45:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:45:16,155 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 [2022-11-16 16:45:16,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:45:16,156 INFO L229 MonitoredProcess]: Starting monitored process 253 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:45:16,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (253)] Waiting until timeout for monitored process [2022-11-16 16:45:16,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:45:16,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:45:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:45:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:45:16,904 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:45:16,904 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:45:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:17,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:45:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:18,179 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:45:18,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789832930] [2022-11-16 16:45:18,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789832930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:45:18,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [783625734] [2022-11-16 16:45:18,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:45:18,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:45:18,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:45:18,181 INFO L229 MonitoredProcess]: Starting monitored process 254 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:45:18,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (254)] Waiting until timeout for monitored process [2022-11-16 16:45:19,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:45:19,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:45:19,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:45:19,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:45:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:45:19,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:45:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:45:20,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [783625734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:45:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323550434] [2022-11-16 16:45:20,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:45:20,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:45:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:45:20,474 INFO L229 MonitoredProcess]: Starting monitored process 255 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:45:20,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-11-16 16:45:21,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:45:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:45:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:45:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:45:21,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:45:21,343 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:45:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:21,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:45:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:22,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323550434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:45:22,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:45:22,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 6, 5, 5] total 24 [2022-11-16 16:45:22,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86109523] [2022-11-16 16:45:22,651 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:45:22,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:45:22,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:45:22,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:45:22,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:45:22,652 INFO L87 Difference]: Start difference. First operand 5757 states and 27171 transitions. Second operand has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-11-16 16:45:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:45:26,128 INFO L93 Difference]: Finished difference Result 5997 states and 27992 transitions. [2022-11-16 16:45:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 16:45:26,130 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 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) Word has length 15 [2022-11-16 16:45:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:45:26,150 INFO L225 Difference]: With dead ends: 5997 [2022-11-16 16:45:26,151 INFO L226 Difference]: Without dead ends: 5997 [2022-11-16 16:45:26,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 16:45:26,151 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:45:26,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 65 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 102 Unchecked, 1.5s Time] [2022-11-16 16:45:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5997 states. [2022-11-16 16:45:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5997 to 5767. [2022-11-16 16:45:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5762 states have (on average 4.723533495314127) internal successors, (27217), 5766 states have internal predecessors, (27217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:45:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 27217 transitions. [2022-11-16 16:45:26,292 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 27217 transitions. Word has length 15 [2022-11-16 16:45:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:45:26,293 INFO L495 AbstractCegarLoop]: Abstraction has 5767 states and 27217 transitions. [2022-11-16 16:45:26,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-11-16 16:45:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 27217 transitions. [2022-11-16 16:45:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:45:26,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:45:26,297 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:45:26,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (254)] Forceful destruction successful, exit code 0 [2022-11-16 16:45:26,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (253)] Forceful destruction successful, exit code 0 [2022-11-16 16:45:26,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-11-16 16:45:26,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,253 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,255 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:45:26,898 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 16:45:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:45:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash 458099591, now seen corresponding path program 4 times [2022-11-16 16:45:26,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:45:26,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116991378] [2022-11-16 16:45:26,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:45:26,899 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 [2022-11-16 16:45:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:45:26,902 INFO L229 MonitoredProcess]: Starting monitored process 256 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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) [2022-11-16 16:45:26,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/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 (256)] Waiting until timeout for monitored process [2022-11-16 16:45:27,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:45:27,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:45:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:45:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:45:27,613 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:45:27,613 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 16:45:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:28,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:45:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:45:29,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:45:29,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116991378] [2022-11-16 16:45:29,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116991378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:45:29,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [722410907] [2022-11-16 16:45:29,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:45:29,712 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:45:29,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:45:29,714 INFO L229 MonitoredProcess]: Starting monitored process 257 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:45:29,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efedccb-7f1e-4bd6-97b5-6c0b56c17133/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (257)] Waiting until timeout for monitored process