./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba --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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- 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-b5237d8 [2022-11-22 01:17:26,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:17:26,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:17:26,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:17:26,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:17:26,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:17:26,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:17:26,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:17:26,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:17:26,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:17:26,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:17:26,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:17:26,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:17:26,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:17:26,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:17:26,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:17:26,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:17:26,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:17:26,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:17:26,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:17:26,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:17:26,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:17:26,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:17:26,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:17:26,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:17:26,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:17:26,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:17:26,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:17:26,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:17:26,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:17:26,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:17:26,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:17:26,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:17:26,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:17:26,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:17:26,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:17:26,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:17:26,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:17:26,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:17:26,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:17:26,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:17:26,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:17:27,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:17:27,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:17:27,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:17:27,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:17:27,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:17:27,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:17:27,021 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:17:27,021 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:17:27,021 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:17:27,022 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:17:27,023 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:17:27,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:17:27,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:17:27,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:17:27,024 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:17:27,024 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:17:27,024 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:17:27,025 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:17:27,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:17:27,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:17:27,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:17:27,026 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:17:27,026 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:17:27,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:17:27,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:17:27,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:17:27,028 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:17:27,028 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:17:27,029 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:17:27,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:17:27,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:17:27,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:17:27,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:17:27,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:17:27,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:17:27,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:17:27,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:17:27,031 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:17:27,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:17:27,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:17:27,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:17:27,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:17:27,032 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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-11-22 01:17:27,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:17:27,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:17:27,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:17:27,360 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:17:27,363 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:17:27,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-22 01:17:30,425 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:17:30,678 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:17:30,678 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-22 01:17:30,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data/a896dfcd8/4fe949b198964a9bb5a18cf77c1ff237/FLAGa64e15351 [2022-11-22 01:17:30,699 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data/a896dfcd8/4fe949b198964a9bb5a18cf77c1ff237 [2022-11-22 01:17:30,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:17:30,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:17:30,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:17:30,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:17:30,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:17:30,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:30" (1/1) ... [2022-11-22 01:17:30,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3807bc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:30, skipping insertion in model container [2022-11-22 01:17:30,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:30" (1/1) ... [2022-11-22 01:17:30,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:17:30,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:17:30,912 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-22 01:17:30,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:17:30,932 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) [2022-11-22 01:17:30,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5881e10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:30, skipping insertion in model container [2022-11-22 01:17:30,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:17:30,934 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 01:17:30,936 INFO L158 Benchmark]: Toolchain (without parser) took 231.87ms. Allocated memory is still 178.3MB. Free memory was 145.0MB in the beginning and 134.7MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:17:30,936 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 125.8MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:17:30,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.41ms. Allocated memory is still 178.3MB. Free memory was 144.7MB in the beginning and 134.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:17:30,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 125.8MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.41ms. Allocated memory is still 178.3MB. Free memory was 144.7MB in the beginning and 134.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba --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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- 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-b5237d8 [2022-11-22 01:17:33,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:17:33,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:17:33,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:17:33,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:17:33,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:17:33,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:17:33,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:17:33,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:17:33,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:17:33,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:17:33,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:17:33,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:17:33,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:17:33,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:17:33,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:17:33,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:17:33,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:17:33,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:17:33,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:17:33,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:17:33,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:17:33,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:17:33,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:17:33,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:17:33,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:17:33,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:17:33,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:17:33,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:17:33,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:17:33,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:17:33,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:17:33,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:17:33,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:17:33,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:17:33,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:17:33,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:17:33,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:17:33,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:17:33,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:17:33,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:17:33,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 01:17:33,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:17:33,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:17:33,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:17:33,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:17:33,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:17:33,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:17:33,320 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:17:33,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:17:33,320 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:17:33,321 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:17:33,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:17:33,322 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:17:33,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:17:33,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:17:33,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:17:33,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:17:33,324 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:17:33,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:17:33,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:17:33,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:17:33,325 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:17:33,325 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:17:33,326 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:17:33,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:17:33,326 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:17:33,326 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 01:17:33,327 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 01:17:33,327 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:17:33,327 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:17:33,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:17:33,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 01:17:33,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:17:33,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:17:33,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:17:33,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:17:33,330 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 01:17:33,330 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 01:17:33,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:17:33,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 01:17:33,331 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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-11-22 01:17:33,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:17:33,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:17:33,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:17:33,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:17:33,760 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:17:33,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-22 01:17:36,853 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:17:37,075 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:17:37,075 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-22 01:17:37,082 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data/b35b9acee/3d2c9096b1ce4739930e3439f3434505/FLAG666beb878 [2022-11-22 01:17:37,104 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/data/b35b9acee/3d2c9096b1ce4739930e3439f3434505 [2022-11-22 01:17:37,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:17:37,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:17:37,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:17:37,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:17:37,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:17:37,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17627ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37, skipping insertion in model container [2022-11-22 01:17:37,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:17:37,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:17:37,333 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-22 01:17:37,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:17:37,358 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 01:17:37,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:17:37,387 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-22 01:17:37,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:17:37,402 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:17:37,445 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-22 01:17:37,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:17:37,480 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:17:37,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37 WrapperNode [2022-11-22 01:17:37,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:17:37,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:17:37,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:17:37,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:17:37,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,553 INFO L138 Inliner]: procedures = 27, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2022-11-22 01:17:37,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:17:37,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:17:37,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:17:37,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:17:37,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:17:37,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:17:37,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:17:37,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:17:37,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (1/1) ... [2022-11-22 01:17:37,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:17:37,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:37,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:17:37,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:17:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:17:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 01:17:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:17:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 01:17:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:17:37,733 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:17:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:17:37,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:17:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 01:17:37,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 01:17:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:17:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:17:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:17:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:17:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:17:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:17:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 01:17:37,737 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:17:37,936 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:17:37,938 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:17:38,542 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:17:38,701 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:17:38,709 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 01:17:38,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:17:38 BoogieIcfgContainer [2022-11-22 01:17:38,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:17:38,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:17:38,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:17:38,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:17:38,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:17:37" (1/3) ... [2022-11-22 01:17:38,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbc0826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:17:38, skipping insertion in model container [2022-11-22 01:17:38,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:37" (2/3) ... [2022-11-22 01:17:38,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbc0826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:17:38, skipping insertion in model container [2022-11-22 01:17:38,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:17:38" (3/3) ... [2022-11-22 01:17:38,723 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2022-11-22 01:17:38,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:17:38,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-22 01:17:38,744 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:17:38,861 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-22 01:17:38,910 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:17:38,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 204 transitions, 432 flow [2022-11-22 01:17:38,951 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 204 transitions, 432 flow [2022-11-22 01:17:38,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 204 transitions, 432 flow [2022-11-22 01:17:39,082 INFO L130 PetriNetUnfolder]: 12/201 cut-off events. [2022-11-22 01:17:39,083 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-22 01:17:39,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 12/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-22 01:17:39,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 2358 [2022-11-22 01:18:12,189 INFO L134 LiptonReduction]: Checked pairs total: 4497 [2022-11-22 01:18:12,190 INFO L136 LiptonReduction]: Total number of compositions: 221 [2022-11-22 01:18:12,199 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 57 transitions, 138 flow [2022-11-22 01:18:12,302 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:12,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:18:12,348 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;@23d1a1b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:18:12,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2022-11-22 01:18:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:18:12,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:12,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:18:12,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:12,410 INFO L85 PathProgramCache]: Analyzing trace with hash 26017, now seen corresponding path program 1 times [2022-11-22 01:18:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:12,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654292249] [2022-11-22 01:18:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:12,435 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 [2022-11-22 01:18:12,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:12,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:12,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:12,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:18:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:12,764 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:12,765 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 [2022-11-22 01:18:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:12,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:12,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:12,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654292249] [2022-11-22 01:18:12,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654292249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:12,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:12,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444382336] [2022-11-22 01:18:12,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:12,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:12,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:12,859 INFO L87 Difference]: Start difference. First operand has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 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) [2022-11-22 01:18:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:13,166 INFO L93 Difference]: Finished difference Result 882 states and 2679 transitions. [2022-11-22 01:18:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:13,168 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 [2022-11-22 01:18:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:13,187 INFO L225 Difference]: With dead ends: 882 [2022-11-22 01:18:13,187 INFO L226 Difference]: Without dead ends: 882 [2022-11-22 01:18:13,188 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 [2022-11-22 01:18:13,191 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:13,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:18:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-11-22 01:18:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2022-11-22 01:18:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 730 states have (on average 3.66986301369863) internal successors, (2679), 881 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2679 transitions. [2022-11-22 01:18:13,348 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2679 transitions. Word has length 2 [2022-11-22 01:18:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:13,349 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 2679 transitions. [2022-11-22 01:18:13,349 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) [2022-11-22 01:18:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2679 transitions. [2022-11-22 01:18:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:18:13,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:13,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:18:13,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:13,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:13,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash 26018, now seen corresponding path program 1 times [2022-11-22 01:18:13,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:13,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644096515] [2022-11-22 01:18:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:13,563 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 [2022-11-22 01:18:13,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:13,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:13,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:13,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:18:13,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:13,761 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:18:13,761 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 [2022-11-22 01:18:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:13,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:13,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:13,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644096515] [2022-11-22 01:18:13,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644096515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:13,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:13,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:13,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827717964] [2022-11-22 01:18:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:13,797 INFO L87 Difference]: Start difference. First operand 882 states and 2679 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) [2022-11-22 01:18:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:14,010 INFO L93 Difference]: Finished difference Result 880 states and 2677 transitions. [2022-11-22 01:18:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:14,011 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 [2022-11-22 01:18:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:14,019 INFO L225 Difference]: With dead ends: 880 [2022-11-22 01:18:14,019 INFO L226 Difference]: Without dead ends: 880 [2022-11-22 01:18:14,019 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 [2022-11-22 01:18:14,021 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:14,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-22 01:18:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2022-11-22 01:18:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 730 states have (on average 3.6671232876712327) internal successors, (2677), 879 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2677 transitions. [2022-11-22 01:18:14,060 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2677 transitions. Word has length 2 [2022-11-22 01:18:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:14,060 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 2677 transitions. [2022-11-22 01:18:14,061 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) [2022-11-22 01:18:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2677 transitions. [2022-11-22 01:18:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:18:14,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:14,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:18:14,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:14,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash 25880, now seen corresponding path program 1 times [2022-11-22 01:18:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:14,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136176567] [2022-11-22 01:18:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:14,274 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 [2022-11-22 01:18:14,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:14,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:14,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:18:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:14,533 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:14,534 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 [2022-11-22 01:18:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:14,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:14,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136176567] [2022-11-22 01:18:14,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136176567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:14,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:14,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:14,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885288849] [2022-11-22 01:18:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:14,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:14,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:14,580 INFO L87 Difference]: Start difference. First operand 880 states and 2677 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) [2022-11-22 01:18:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:15,044 INFO L93 Difference]: Finished difference Result 1758 states and 5352 transitions. [2022-11-22 01:18:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:15,045 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 [2022-11-22 01:18:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:15,058 INFO L225 Difference]: With dead ends: 1758 [2022-11-22 01:18:15,059 INFO L226 Difference]: Without dead ends: 1758 [2022-11-22 01:18:15,059 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 [2022-11-22 01:18:15,069 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:15,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:18:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-11-22 01:18:15,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 881. [2022-11-22 01:18:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 731 states have (on average 3.667578659370725) internal successors, (2681), 880 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2681 transitions. [2022-11-22 01:18:15,121 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2681 transitions. Word has length 2 [2022-11-22 01:18:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:15,121 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 2681 transitions. [2022-11-22 01:18:15,121 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) [2022-11-22 01:18:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2681 transitions. [2022-11-22 01:18:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:18:15,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:15,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:18:15,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:15,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:15,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash 26043, now seen corresponding path program 1 times [2022-11-22 01:18:15,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:15,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259809760] [2022-11-22 01:18:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:15,340 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 [2022-11-22 01:18:15,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:15,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:15,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:18:15,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:15,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:15,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259809760] [2022-11-22 01:18:15,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259809760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:15,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:15,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187846370] [2022-11-22 01:18:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:15,486 INFO L87 Difference]: Start difference. First operand 881 states and 2681 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) [2022-11-22 01:18:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:15,779 INFO L93 Difference]: Finished difference Result 881 states and 2678 transitions. [2022-11-22 01:18:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:15,780 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 [2022-11-22 01:18:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:15,786 INFO L225 Difference]: With dead ends: 881 [2022-11-22 01:18:15,786 INFO L226 Difference]: Without dead ends: 881 [2022-11-22 01:18:15,786 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 [2022-11-22 01:18:15,787 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:15,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:18:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-22 01:18:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 881. [2022-11-22 01:18:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 731 states have (on average 3.6634746922024624) internal successors, (2678), 880 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2678 transitions. [2022-11-22 01:18:15,822 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2678 transitions. Word has length 2 [2022-11-22 01:18:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:15,823 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 2678 transitions. [2022-11-22 01:18:15,823 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) [2022-11-22 01:18:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2678 transitions. [2022-11-22 01:18:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:18:15,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:15,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:18:15,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:16,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:16,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 806677, now seen corresponding path program 1 times [2022-11-22 01:18:16,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454637822] [2022-11-22 01:18:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:16,037 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 [2022-11-22 01:18:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:16,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:16,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Waiting until timeout for monitored process [2022-11-22 01:18:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:16,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:18:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:16,264 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:16,265 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 [2022-11-22 01:18:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:16,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:16,614 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:16,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454637822] [2022-11-22 01:18:16,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454637822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:16,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835287687] [2022-11-22 01:18:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:16,615 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:18:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:18:16,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:18:16,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 01:18:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:18:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:16,911 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:16,911 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 [2022-11-22 01:18:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:16,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:17,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1835287687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:17,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979579757] [2022-11-22 01:18:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:17,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:17,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:17,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:17,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:18:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:18:17,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:17,288 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:17,288 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 [2022-11-22 01:18:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:17,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:17,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979579757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:17,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:18:17,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-22 01:18:17,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882538324] [2022-11-22 01:18:17,516 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:17,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:18:17,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:18:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:18:17,517 INFO L87 Difference]: Start difference. First operand 881 states and 2678 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2022-11-22 01:18:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:18,742 INFO L93 Difference]: Finished difference Result 1761 states and 5361 transitions. [2022-11-22 01:18:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:18:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 3 [2022-11-22 01:18:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:18,755 INFO L225 Difference]: With dead ends: 1761 [2022-11-22 01:18:18,756 INFO L226 Difference]: Without dead ends: 1761 [2022-11-22 01:18:18,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:18:18,757 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 213 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:18,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 8 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:18:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-11-22 01:18:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 884. [2022-11-22 01:18:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 734 states have (on average 3.664850136239782) internal successors, (2690), 883 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2690 transitions. [2022-11-22 01:18:18,812 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2690 transitions. Word has length 3 [2022-11-22 01:18:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:18,812 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 2690 transitions. [2022-11-22 01:18:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2022-11-22 01:18:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2690 transitions. [2022-11-22 01:18:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:18:18,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:18,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:18:18,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:19,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:19,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:19,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:19,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash 806840, now seen corresponding path program 1 times [2022-11-22 01:18:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:19,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180280428] [2022-11-22 01:18:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:19,417 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 [2022-11-22 01:18:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:19,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:19,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:18:19,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:19,621 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-22 01:18:19,621 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 [2022-11-22 01:18:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:19,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:19,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:19,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180280428] [2022-11-22 01:18:19,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180280428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:19,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:19,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:19,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970609235] [2022-11-22 01:18:19,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:19,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:19,705 INFO L87 Difference]: Start difference. First operand 884 states and 2690 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) [2022-11-22 01:18:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:19,970 INFO L93 Difference]: Finished difference Result 755 states and 2238 transitions. [2022-11-22 01:18:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:19,970 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 [2022-11-22 01:18:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:19,975 INFO L225 Difference]: With dead ends: 755 [2022-11-22 01:18:19,975 INFO L226 Difference]: Without dead ends: 755 [2022-11-22 01:18:19,975 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 [2022-11-22 01:18:19,976 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:19,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:18:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-22 01:18:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 755. [2022-11-22 01:18:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 631 states have (on average 3.5467511885895404) internal successors, (2238), 754 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2238 transitions. [2022-11-22 01:18:20,023 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2238 transitions. Word has length 3 [2022-11-22 01:18:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:20,024 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 2238 transitions. [2022-11-22 01:18:20,024 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) [2022-11-22 01:18:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2238 transitions. [2022-11-22 01:18:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:18:20,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:20,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:18:20,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:20,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:20,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash 806842, now seen corresponding path program 1 times [2022-11-22 01:18:20,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:20,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185023930] [2022-11-22 01:18:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:20,238 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 [2022-11-22 01:18:20,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:20,239 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:20,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:18:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:20,485 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-22 01:18:20,486 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 17 treesize of output 35 [2022-11-22 01:18:20,518 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-22 01:18:20,518 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 [2022-11-22 01:18:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:20,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:20,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:20,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185023930] [2022-11-22 01:18:20,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185023930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:20,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:20,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:20,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273550733] [2022-11-22 01:18:20,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:20,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:20,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:20,628 INFO L87 Difference]: Start difference. First operand 755 states and 2238 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) [2022-11-22 01:18:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:20,818 INFO L93 Difference]: Finished difference Result 626 states and 1786 transitions. [2022-11-22 01:18:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:20,818 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 [2022-11-22 01:18:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:20,823 INFO L225 Difference]: With dead ends: 626 [2022-11-22 01:18:20,823 INFO L226 Difference]: Without dead ends: 626 [2022-11-22 01:18:20,823 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 [2022-11-22 01:18:20,824 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2 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 [2022-11-22 01:18:20,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-11-22 01:18:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2022-11-22 01:18:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 528 states have (on average 3.382575757575758) internal successors, (1786), 625 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1786 transitions. [2022-11-22 01:18:20,844 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1786 transitions. Word has length 3 [2022-11-22 01:18:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:20,844 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1786 transitions. [2022-11-22 01:18:20,844 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) [2022-11-22 01:18:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1786 transitions. [2022-11-22 01:18:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:18:20,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:20,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:18:20,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 01:18:21,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:21,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 775392015, now seen corresponding path program 1 times [2022-11-22 01:18:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:21,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599703099] [2022-11-22 01:18:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:21,059 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 [2022-11-22 01:18:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:21,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:21,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:18:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:21,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:21,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:21,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599703099] [2022-11-22 01:18:21,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599703099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:21,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:21,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:18:21,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718105075] [2022-11-22 01:18:21,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:21,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:21,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:21,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:21,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:21,167 INFO L87 Difference]: Start difference. First operand 626 states and 1786 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:21,345 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2022-11-22 01:18:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:21,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:18:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:21,348 INFO L225 Difference]: With dead ends: 378 [2022-11-22 01:18:21,348 INFO L226 Difference]: Without dead ends: 378 [2022-11-22 01:18:21,349 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 [2022-11-22 01:18:21,349 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:21,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-22 01:18:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-22 01:18:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 336 states have (on average 3.1488095238095237) internal successors, (1058), 377 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1058 transitions. [2022-11-22 01:18:21,361 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1058 transitions. Word has length 5 [2022-11-22 01:18:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:21,362 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1058 transitions. [2022-11-22 01:18:21,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1058 transitions. [2022-11-22 01:18:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:18:21,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:21,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:18:21,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:21,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash 775392016, now seen corresponding path program 1 times [2022-11-22 01:18:21,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:21,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074783391] [2022-11-22 01:18:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:21,575 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 [2022-11-22 01:18:21,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:21,576 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:21,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Waiting until timeout for monitored process [2022-11-22 01:18:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:18:21,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:21,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:21,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:21,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074783391] [2022-11-22 01:18:21,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074783391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:21,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:21,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:18:21,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774119303] [2022-11-22 01:18:21,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:21,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:21,730 INFO L87 Difference]: Start difference. First operand 378 states and 1058 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:21,959 INFO L93 Difference]: Finished difference Result 278 states and 766 transitions. [2022-11-22 01:18:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:21,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:18:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:21,964 INFO L225 Difference]: With dead ends: 278 [2022-11-22 01:18:21,964 INFO L226 Difference]: Without dead ends: 278 [2022-11-22 01:18:21,965 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 [2022-11-22 01:18:21,967 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 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 [2022-11-22 01:18:21,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-22 01:18:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-11-22 01:18:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 255 states have (on average 3.003921568627451) internal successors, (766), 277 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 766 transitions. [2022-11-22 01:18:21,978 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 766 transitions. Word has length 5 [2022-11-22 01:18:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:21,979 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 766 transitions. [2022-11-22 01:18:21,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 766 transitions. [2022-11-22 01:18:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:18:21,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:21,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:18:22,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:22,192 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash 775392215, now seen corresponding path program 1 times [2022-11-22 01:18:22,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:22,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484297606] [2022-11-22 01:18:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:22,193 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 [2022-11-22 01:18:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:22,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:22,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:18:22,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:22,396 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 01:18:22,397 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 [2022-11-22 01:18:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:22,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:22,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:22,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484297606] [2022-11-22 01:18:22,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484297606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:22,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:22,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130427066] [2022-11-22 01:18:22,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:22,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:22,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:22,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:22,525 INFO L87 Difference]: Start difference. First operand 278 states and 766 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) [2022-11-22 01:18:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:22,699 INFO L93 Difference]: Finished difference Result 263 states and 731 transitions. [2022-11-22 01:18:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:22,699 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 [2022-11-22 01:18:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:22,702 INFO L225 Difference]: With dead ends: 263 [2022-11-22 01:18:22,702 INFO L226 Difference]: Without dead ends: 263 [2022-11-22 01:18:22,702 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 [2022-11-22 01:18:22,702 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:22,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-22 01:18:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-22 01:18:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 244 states have (on average 2.9959016393442623) internal successors, (731), 262 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 731 transitions. [2022-11-22 01:18:22,711 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 731 transitions. Word has length 5 [2022-11-22 01:18:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:22,711 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 731 transitions. [2022-11-22 01:18:22,711 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) [2022-11-22 01:18:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 731 transitions. [2022-11-22 01:18:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:18:22,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:22,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:18:22,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:22,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash 775392216, now seen corresponding path program 1 times [2022-11-22 01:18:22,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:22,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674057717] [2022-11-22 01:18:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:22,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:22,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:22,926 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:22,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-22 01:18:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:18:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:23,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:23,201 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-22 01:18:23,201 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 [2022-11-22 01:18:23,216 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 [2022-11-22 01:18:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:23,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:23,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:23,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674057717] [2022-11-22 01:18:23,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674057717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:23,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1980163428] [2022-11-22 01:18:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:23,718 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:18:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:18:23,720 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:18:23,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-22 01:18:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:18:23,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:24,063 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-22 01:18:24,063 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 [2022-11-22 01:18:24,084 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 [2022-11-22 01:18:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:24,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:24,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1980163428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:24,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:18:24,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-22 01:18:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921068719] [2022-11-22 01:18:24,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:24,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:24,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:18:24,195 INFO L87 Difference]: Start difference. First operand 263 states and 731 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) [2022-11-22 01:18:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:24,379 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2022-11-22 01:18:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:24,379 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 [2022-11-22 01:18:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:24,381 INFO L225 Difference]: With dead ends: 248 [2022-11-22 01:18:24,381 INFO L226 Difference]: Without dead ends: 248 [2022-11-22 01:18:24,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:18:24,382 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:24,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-22 01:18:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-11-22 01:18:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 233 states have (on average 2.9871244635193133) internal successors, (696), 247 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 696 transitions. [2022-11-22 01:18:24,389 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 696 transitions. Word has length 5 [2022-11-22 01:18:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:24,389 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 696 transitions. [2022-11-22 01:18:24,390 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) [2022-11-22 01:18:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 696 transitions. [2022-11-22 01:18:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:18:24,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:24,390 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 01:18:24,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-11-22 01:18:24,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:24,793 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1733723048, now seen corresponding path program 2 times [2022-11-22 01:18:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:24,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628660480] [2022-11-22 01:18:24,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:18:24,795 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 [2022-11-22 01:18:24,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:24,796 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:24,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:24,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:18:24,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:18:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:25,049 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:25,050 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 [2022-11-22 01:18:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:25,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:25,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628660480] [2022-11-22 01:18:25,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628660480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107718555] [2022-11-22 01:18:25,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:18:25,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:18:25,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:18:25,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:18:25,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-22 01:18:26,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:18:26,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:26,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:18:26,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:26,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:26,349 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 [2022-11-22 01:18:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:26,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107718555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925123635] [2022-11-22 01:18:27,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:18:27,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:27,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:27,350 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:27,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:18:27,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:18:27,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:18:27,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:27,625 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:27,625 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 [2022-11-22 01:18:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:27,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:28,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925123635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:28,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:18:28,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-22 01:18:28,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931806232] [2022-11-22 01:18:28,053 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:28,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:18:28,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:28,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:18:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:18:28,054 INFO L87 Difference]: Start difference. First operand 248 states and 696 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:33,069 INFO L93 Difference]: Finished difference Result 1941 states and 5503 transitions. [2022-11-22 01:18:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:18:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:18:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:33,080 INFO L225 Difference]: With dead ends: 1941 [2022-11-22 01:18:33,081 INFO L226 Difference]: Without dead ends: 1941 [2022-11-22 01:18:33,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:18:33,082 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 813 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:33,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 0 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 01:18:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-11-22 01:18:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 254. [2022-11-22 01:18:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 2.9623430962343096) internal successors, (708), 253 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 708 transitions. [2022-11-22 01:18:33,102 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 708 transitions. Word has length 6 [2022-11-22 01:18:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:33,103 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 708 transitions. [2022-11-22 01:18:33,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 708 transitions. [2022-11-22 01:18:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:18:33,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:33,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:33,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-11-22 01:18:33,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:33,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:33,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:33,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2122406458, now seen corresponding path program 1 times [2022-11-22 01:18:33,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:33,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264118266] [2022-11-22 01:18:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:33,709 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 [2022-11-22 01:18:33,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:33,710 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:33,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-22 01:18:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:18:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:33,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:33,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:33,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264118266] [2022-11-22 01:18:33,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264118266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:33,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:33,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:18:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666131731] [2022-11-22 01:18:33,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:33,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:18:33,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:18:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:18:33,893 INFO L87 Difference]: Start difference. First operand 254 states and 708 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:34,206 INFO L93 Difference]: Finished difference Result 368 states and 1020 transitions. [2022-11-22 01:18:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:18:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:18:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:34,213 INFO L225 Difference]: With dead ends: 368 [2022-11-22 01:18:34,214 INFO L226 Difference]: Without dead ends: 368 [2022-11-22 01:18:34,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:18:34,215 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:34,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:18:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-22 01:18:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2022-11-22 01:18:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 281 states have (on average 3.110320284697509) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2022-11-22 01:18:34,224 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 7 [2022-11-22 01:18:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:34,225 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2022-11-22 01:18:34,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2022-11-22 01:18:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:18:34,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:34,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:34,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:34,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:34,439 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:34,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2122593422, now seen corresponding path program 1 times [2022-11-22 01:18:34,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:34,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71404210] [2022-11-22 01:18:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:34,439 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 [2022-11-22 01:18:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:34,441 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:34,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:34,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:18:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:34,654 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 01:18:34,655 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 [2022-11-22 01:18:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:34,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:34,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:34,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71404210] [2022-11-22 01:18:34,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71404210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:34,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:34,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:18:34,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563814412] [2022-11-22 01:18:34,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:34,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:34,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:34,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:34,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:34,710 INFO L87 Difference]: Start difference. First operand 296 states and 874 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) [2022-11-22 01:18:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:34,849 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2022-11-22 01:18:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:34,849 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 [2022-11-22 01:18:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:34,851 INFO L225 Difference]: With dead ends: 264 [2022-11-22 01:18:34,851 INFO L226 Difference]: Without dead ends: 264 [2022-11-22 01:18:34,851 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 [2022-11-22 01:18:34,852 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:34,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:18:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-22 01:18:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-22 01:18:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 254 states have (on average 3.0551181102362204) internal successors, (776), 263 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 776 transitions. [2022-11-22 01:18:34,860 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 776 transitions. Word has length 7 [2022-11-22 01:18:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:34,860 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 776 transitions. [2022-11-22 01:18:34,861 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) [2022-11-22 01:18:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 776 transitions. [2022-11-22 01:18:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:18:34,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:34,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:34,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:35,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:35,074 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2122593423, now seen corresponding path program 1 times [2022-11-22 01:18:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:35,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963264595] [2022-11-22 01:18:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:35,076 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 [2022-11-22 01:18:35,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:35,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:35,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:18:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:35,355 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:35,355 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 [2022-11-22 01:18:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:35,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:35,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:35,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963264595] [2022-11-22 01:18:35,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963264595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:35,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [214916780] [2022-11-22 01:18:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:35,870 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:18:35,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:18:35,872 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:18:35,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-22 01:18:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:18:36,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:36,215 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-22 01:18:36,215 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 [2022-11-22 01:18:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:36,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [214916780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:36,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:18:36,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-22 01:18:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20772160] [2022-11-22 01:18:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:18:36,338 INFO L87 Difference]: Start difference. First operand 264 states and 776 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) [2022-11-22 01:18:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:36,475 INFO L93 Difference]: Finished difference Result 232 states and 678 transitions. [2022-11-22 01:18:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:36,476 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 [2022-11-22 01:18:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:36,478 INFO L225 Difference]: With dead ends: 232 [2022-11-22 01:18:36,478 INFO L226 Difference]: Without dead ends: 232 [2022-11-22 01:18:36,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:18:36,479 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:36,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:18:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-22 01:18:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-11-22 01:18:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 2.986784140969163) internal successors, (678), 231 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 678 transitions. [2022-11-22 01:18:36,486 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 678 transitions. Word has length 7 [2022-11-22 01:18:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:36,486 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 678 transitions. [2022-11-22 01:18:36,487 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) [2022-11-22 01:18:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 678 transitions. [2022-11-22 01:18:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:18:36,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:36,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:36,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:36,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:36,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:36,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:36,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1370095339, now seen corresponding path program 1 times [2022-11-22 01:18:36,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:36,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999096238] [2022-11-22 01:18:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:36,892 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 [2022-11-22 01:18:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:36,893 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:36,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:37,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:18:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:37,141 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:37,141 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 [2022-11-22 01:18:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:37,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:37,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999096238] [2022-11-22 01:18:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999096238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422876328] [2022-11-22 01:18:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:18:37,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:18:37,742 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:18:37,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-22 01:18:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:18:37,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:38,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [422876328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155813941] [2022-11-22 01:18:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:38,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:38,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:38,443 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:38,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 01:18:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:38,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:18:38,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:38,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:38,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155813941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:38,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:18:38,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-22 01:18:38,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120677120] [2022-11-22 01:18:38,801 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:18:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:18:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:18:38,803 INFO L87 Difference]: Start difference. First operand 232 states and 678 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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) [2022-11-22 01:18:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:42,498 INFO L93 Difference]: Finished difference Result 573 states and 1641 transitions. [2022-11-22 01:18:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 01:18:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 8 [2022-11-22 01:18:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:42,502 INFO L225 Difference]: With dead ends: 573 [2022-11-22 01:18:42,502 INFO L226 Difference]: Without dead ends: 573 [2022-11-22 01:18:42,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:18:42,503 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 536 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:42,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 0 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 01:18:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-22 01:18:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 457. [2022-11-22 01:18:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 452 states have (on average 3.099557522123894) internal successors, (1401), 456 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1401 transitions. [2022-11-22 01:18:42,517 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1401 transitions. Word has length 8 [2022-11-22 01:18:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:42,517 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 1401 transitions. [2022-11-22 01:18:42,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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) [2022-11-22 01:18:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1401 transitions. [2022-11-22 01:18:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:18:42,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:42,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:42,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:42,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:42,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-22 01:18:43,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:43,122 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -297362301, now seen corresponding path program 1 times [2022-11-22 01:18:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:43,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844280605] [2022-11-22 01:18:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:43,124 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 [2022-11-22 01:18:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:43,125 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:43,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:18:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:43,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:18:43,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:43,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844280605] [2022-11-22 01:18:43,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844280605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:43,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:43,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:18:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112873766] [2022-11-22 01:18:43,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:18:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:18:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:18:43,314 INFO L87 Difference]: Start difference. First operand 457 states and 1401 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:43,628 INFO L93 Difference]: Finished difference Result 627 states and 1933 transitions. [2022-11-22 01:18:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:18:43,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:18:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:43,632 INFO L225 Difference]: With dead ends: 627 [2022-11-22 01:18:43,632 INFO L226 Difference]: Without dead ends: 627 [2022-11-22 01:18:43,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:18:43,633 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:43,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:18:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-11-22 01:18:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 539. [2022-11-22 01:18:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 3.2677902621722845) internal successors, (1745), 538 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1745 transitions. [2022-11-22 01:18:43,650 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1745 transitions. Word has length 9 [2022-11-22 01:18:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:43,651 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 1745 transitions. [2022-11-22 01:18:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1745 transitions. [2022-11-22 01:18:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:18:43,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:43,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:43,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:43,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:18:43,865 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash -628292647, now seen corresponding path program 1 times [2022-11-22 01:18:43,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:43,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301933140] [2022-11-22 01:18:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:43,866 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 [2022-11-22 01:18:43,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:43,867 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:43,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:43,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:18:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:44,123 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:44,124 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 [2022-11-22 01:18:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:44,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:18:44,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:44,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301933140] [2022-11-22 01:18:44,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301933140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:44,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262646427] [2022-11-22 01:18:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:44,815 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:18:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:18:44,817 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:18:44,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-22 01:18:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:18:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:45,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:45,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262646427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:45,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114007254] [2022-11-22 01:18:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:45,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:45,548 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:45,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-22 01:18:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:18:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:45,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:45,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114007254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:45,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:18:45,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-22 01:18:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506336854] [2022-11-22 01:18:45,905 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:45,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:18:45,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:18:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:18:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:18:45,906 INFO L87 Difference]: Start difference. First operand 539 states and 1745 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:49,031 INFO L93 Difference]: Finished difference Result 811 states and 2561 transitions. [2022-11-22 01:18:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 01:18:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2022-11-22 01:18:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:49,037 INFO L225 Difference]: With dead ends: 811 [2022-11-22 01:18:49,037 INFO L226 Difference]: Without dead ends: 811 [2022-11-22 01:18:49,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:18:49,038 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 447 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:49,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 0 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:18:49,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-22 01:18:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 731. [2022-11-22 01:18:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 726 states have (on average 3.3071625344352618) internal successors, (2401), 730 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2401 transitions. [2022-11-22 01:18:49,059 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2401 transitions. Word has length 10 [2022-11-22 01:18:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:49,059 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 2401 transitions. [2022-11-22 01:18:49,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2401 transitions. [2022-11-22 01:18:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:18:49,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:49,061 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 01:18:49,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:49,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:49,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:49,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:49,664 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:18:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1291283656, now seen corresponding path program 3 times [2022-11-22 01:18:49,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:18:49,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488130272] [2022-11-22 01:18:49,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:18:49,665 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 [2022-11-22 01:18:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:18:49,667 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:18:49,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:18:49,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:18:49,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:18:49,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:50,058 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:50,058 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 [2022-11-22 01:18:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:50,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:53,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:18:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488130272] [2022-11-22 01:18:53,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488130272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591422252] [2022-11-22 01:18:53,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:18:53,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:18:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:18:53,861 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:18:53,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-22 01:18:54,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:18:54,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:18:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:54,737 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:18:54,737 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 [2022-11-22 01:18:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:54,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:59,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591422252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:59,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218299021] [2022-11-22 01:18:59,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:18:59,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:59,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:59,092 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:59,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 01:19:01,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:19:01,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:19:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:19:01,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:01,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:19:01,446 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 [2022-11-22 01:19:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:19:02,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:19:02,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218299021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:02,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:19:02,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-22 01:19:02,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325388291] [2022-11-22 01:19:02,784 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:19:02,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-22 01:19:02,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:19:02,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-22 01:19:02,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:19:02,786 INFO L87 Difference]: Start difference. First operand 731 states and 2401 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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) [2022-11-22 01:19:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:19:27,830 INFO L93 Difference]: Finished difference Result 10605 states and 37275 transitions. [2022-11-22 01:19:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:19:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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 [2022-11-22 01:19:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:19:27,897 INFO L225 Difference]: With dead ends: 10605 [2022-11-22 01:19:27,897 INFO L226 Difference]: Without dead ends: 10605 [2022-11-22 01:19:27,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=941, Invalid=1921, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 01:19:27,899 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4735 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4470 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4735 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:19:27,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4735 Valid, 0 Invalid, 4513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4470 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2022-11-22 01:19:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2022-11-22 01:19:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 743. [2022-11-22 01:19:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 738 states have (on average 3.285907859078591) internal successors, (2425), 742 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2425 transitions. [2022-11-22 01:19:28,065 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2425 transitions. Word has length 12 [2022-11-22 01:19:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:19:28,065 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 2425 transitions. [2022-11-22 01:19:28,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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) [2022-11-22 01:19:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2425 transitions. [2022-11-22 01:19:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:19:28,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:28,069 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 01:19:28,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-22 01:19:28,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:19:28,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-22 01:19:28,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:19:28,681 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:19:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:28,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1992065309, now seen corresponding path program 2 times [2022-11-22 01:19:28,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:19:28,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494007966] [2022-11-22 01:19:28,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:19:28,682 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 [2022-11-22 01:19:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:19:28,683 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:19:28,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:19:28,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:19:28,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:19:28,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:19:28,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:29,000 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:19:29,000 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 [2022-11-22 01:19:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:19:29,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:19:31,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:19:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494007966] [2022-11-22 01:19:31,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494007966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [340224524] [2022-11-22 01:19:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:19:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:19:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:19:31,126 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:19:31,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-22 01:19:31,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:19:31,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:19:31,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:19:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:19:31,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:19:32,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [340224524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51994571] [2022-11-22 01:19:32,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:19:32,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:32,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:32,808 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:32,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-22 01:19:32,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:19:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:19:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:19:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:19:33,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:19:33,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51994571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:33,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:19:33,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-11-22 01:19:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174658887] [2022-11-22 01:19:33,113 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:19:33,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:19:33,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:19:33,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:19:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:19:33,115 INFO L87 Difference]: Start difference. First operand 743 states and 2425 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 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) [2022-11-22 01:19:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:19:57,821 INFO L93 Difference]: Finished difference Result 2293 states and 7135 transitions. [2022-11-22 01:19:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 01:19:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 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 [2022-11-22 01:19:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:19:57,830 INFO L225 Difference]: With dead ends: 2293 [2022-11-22 01:19:57,831 INFO L226 Difference]: Without dead ends: 2293 [2022-11-22 01:19:57,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=811, Invalid=2611, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 01:19:57,832 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:19:57,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 0 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2022-11-22 01:19:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-11-22 01:19:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1237. [2022-11-22 01:19:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 3.3400974025974026) internal successors, (4115), 1236 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4115 transitions. [2022-11-22 01:19:57,874 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4115 transitions. Word has length 12 [2022-11-22 01:19:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:19:57,874 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 4115 transitions. [2022-11-22 01:19:57,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 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) [2022-11-22 01:19:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4115 transitions. [2022-11-22 01:19:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:19:57,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:57,877 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-11-22 01:19:57,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:19:58,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-22 01:19:58,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-22 01:19:58,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:19:58,485 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:19:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:58,486 INFO L85 PathProgramCache]: Analyzing trace with hash -973301173, now seen corresponding path program 3 times [2022-11-22 01:19:58,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:19:58,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772818124] [2022-11-22 01:19:58,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:19:58,487 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 [2022-11-22 01:19:58,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:19:58,487 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:19:58,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:19:58,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:19:58,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:19:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:19:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:58,958 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:19:58,958 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 [2022-11-22 01:19:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:19:59,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:59,480 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 8 treesize of output 6 [2022-11-22 01:19:59,499 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:19:59,502 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:20:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:20:00,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:20:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772818124] [2022-11-22 01:20:00,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772818124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:20:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813380728] [2022-11-22 01:20:00,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:20:00,829 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:20:00,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:20:00,830 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:20:00,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-22 01:20:01,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:20:01,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:20:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:20:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:20:02,062 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:20:02,063 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 [2022-11-22 01:20:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:20:02,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:20:02,302 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 8 treesize of output 6 [2022-11-22 01:20:02,321 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:20:02,324 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:20:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:20:02,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [813380728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:20:02,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028557160] [2022-11-22 01:20:02,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:20:02,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:20:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:20:02,515 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:20:02,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-22 01:20:02,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:20:02,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:20:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:20:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:20:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:20:03,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:20:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:20:04,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028557160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:20:04,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:20:04,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 39 [2022-11-22 01:20:04,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628857843] [2022-11-22 01:20:04,622 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:20:04,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-22 01:20:04,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:20:04,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-22 01:20:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:20:04,624 INFO L87 Difference]: Start difference. First operand 1237 states and 4115 transitions. Second operand has 40 states, 40 states have (on average 1.3) internal successors, (52), 39 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) [2022-11-22 01:20:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:20:38,551 INFO L93 Difference]: Finished difference Result 2669 states and 8363 transitions. [2022-11-22 01:20:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-22 01:20:38,553 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 39 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 14 [2022-11-22 01:20:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:20:38,562 INFO L225 Difference]: With dead ends: 2669 [2022-11-22 01:20:38,562 INFO L226 Difference]: Without dead ends: 2669 [2022-11-22 01:20:38,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=757, Invalid=4355, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 01:20:38,564 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1314 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5102 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 5102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:20:38,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 0 Invalid, 5151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 5102 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2022-11-22 01:20:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-11-22 01:20:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 1743. [2022-11-22 01:20:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1738 states have (on average 3.4182968929804374) internal successors, (5941), 1742 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:20:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 5941 transitions. [2022-11-22 01:20:38,637 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 5941 transitions. Word has length 14 [2022-11-22 01:20:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:20:38,639 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 5941 transitions. [2022-11-22 01:20:38,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 39 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) [2022-11-22 01:20:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 5941 transitions. [2022-11-22 01:20:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:20:38,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:20:38,642 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:20:38,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:20:38,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-22 01:20:39,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-22 01:20:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:20:39,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:20:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:20:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1702471654, now seen corresponding path program 2 times [2022-11-22 01:20:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:20:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969637789] [2022-11-22 01:20:39,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:20:39,257 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 [2022-11-22 01:20:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:20:39,258 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:20:39,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-22 01:20:39,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:20:39,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:20:39,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:20:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:20:39,597 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:20:39,598 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 [2022-11-22 01:20:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:20:40,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:20:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:20:41,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:20:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969637789] [2022-11-22 01:20:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969637789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:20:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1651092466] [2022-11-22 01:20:41,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:20:41,737 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:20:41,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:20:41,738 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:20:41,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-22 01:20:42,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:20:42,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:20:42,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:20:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:20:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:20:42,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:20:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:20:43,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1651092466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:20:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066731709] [2022-11-22 01:20:43,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:20:43,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:20:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:20:43,441 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:20:43,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-22 01:20:43,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:20:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:20:43,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:20:43,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:20:43,816 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:20:43,816 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 [2022-11-22 01:20:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:20:44,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:20:44,656 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 8 treesize of output 6 [2022-11-22 01:20:44,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-22 01:20:44,695 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:20:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:20:46,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066731709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:20:46,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:20:46,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 47 [2022-11-22 01:20:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647455169] [2022-11-22 01:20:46,507 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:20:46,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-22 01:20:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:20:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-22 01:20:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:20:46,509 INFO L87 Difference]: Start difference. First operand 1743 states and 5941 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 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) [2022-11-22 01:21:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:21,696 INFO L93 Difference]: Finished difference Result 3163 states and 9901 transitions. [2022-11-22 01:21:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 01:21:21,698 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 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 14 [2022-11-22 01:21:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:21,711 INFO L225 Difference]: With dead ends: 3163 [2022-11-22 01:21:21,711 INFO L226 Difference]: Without dead ends: 3163 [2022-11-22 01:21:21,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=956, Invalid=4896, Unknown=0, NotChecked=0, Total=5852 [2022-11-22 01:21:21,718 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1236 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3462 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:21,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 0 Invalid, 3525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3462 Invalid, 0 Unknown, 0 Unchecked, 17.9s Time] [2022-11-22 01:21:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-11-22 01:21:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2079. [2022-11-22 01:21:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2074 states have (on average 3.4161041465766635) internal successors, (7085), 2078 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7085 transitions. [2022-11-22 01:21:21,799 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7085 transitions. Word has length 14 [2022-11-22 01:21:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:21,800 INFO L495 AbstractCegarLoop]: Abstraction has 2079 states and 7085 transitions. [2022-11-22 01:21:21,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 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) [2022-11-22 01:21:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7085 transitions. [2022-11-22 01:21:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:21:21,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:21,803 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:21:21,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:22,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-22 01:21:22,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-22 01:21:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:22,408 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:21:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -715028387, now seen corresponding path program 4 times [2022-11-22 01:21:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:22,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369906306] [2022-11-22 01:21:22,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:21:22,409 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 [2022-11-22 01:21:22,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:22,410 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:22,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Waiting until timeout for monitored process [2022-11-22 01:21:22,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:21:22,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:22,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:21:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:23,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:24,607 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 38 treesize of output 32 [2022-11-22 01:21:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:25,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369906306] [2022-11-22 01:21:25,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369906306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803031589] [2022-11-22 01:21:25,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:21:25,631 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:21:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:21:25,632 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:21:25,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-22 01:21:25,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:21:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:21:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:26,108 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:26,108 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 [2022-11-22 01:21:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:27,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:30,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1803031589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:30,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125695772] [2022-11-22 01:21:30,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:21:30,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:30,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:21:30,419 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:21:30,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-22 01:21:30,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:21:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:21:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:30,760 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:30,761 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 [2022-11-22 01:21:32,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-11-22 01:21:32,672 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 [2022-11-22 01:21:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:21:32,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:33,031 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 8 treesize of output 6 [2022-11-22 01:21:33,056 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:21:33,059 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:21:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:21:38,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125695772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:38,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:21:38,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 12, 12] total 69 [2022-11-22 01:21:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626367577] [2022-11-22 01:21:38,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:21:38,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-22 01:21:38,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-22 01:21:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=4452, Unknown=0, NotChecked=0, Total=4970 [2022-11-22 01:21:38,751 INFO L87 Difference]: Start difference. First operand 2079 states and 7085 transitions. Second operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:23:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:40,730 INFO L93 Difference]: Finished difference Result 10104 states and 31736 transitions. [2022-11-22 01:23:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-22 01:23:40,731 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 01:23:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:40,755 INFO L225 Difference]: With dead ends: 10104 [2022-11-22 01:23:40,755 INFO L226 Difference]: Without dead ends: 10104 [2022-11-22 01:23:40,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6883 ImplicationChecksByTransitivity, 104.5s TimeCoverageRelationStatistics Valid=3708, Invalid=19854, Unknown=0, NotChecked=0, Total=23562 [2022-11-22 01:23:40,758 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7013 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10318 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7013 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 10318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:40,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7013 Valid, 0 Invalid, 10444 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [126 Valid, 10318 Invalid, 0 Unknown, 0 Unchecked, 30.1s Time] [2022-11-22 01:23:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10104 states. [2022-11-22 01:23:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10104 to 2660. [2022-11-22 01:23:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2660 states, 2655 states have (on average 3.560075329566855) internal successors, (9452), 2659 states have internal predecessors, (9452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:23:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 9452 transitions. [2022-11-22 01:23:40,969 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 9452 transitions. Word has length 16 [2022-11-22 01:23:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:40,970 INFO L495 AbstractCegarLoop]: Abstraction has 2660 states and 9452 transitions. [2022-11-22 01:23:40,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:23:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 9452 transitions. [2022-11-22 01:23:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:23:40,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:40,973 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-22 01:23:40,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:41,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-22 01:23:41,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 01:23:41,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:23:41,577 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:23:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:41,578 INFO L85 PathProgramCache]: Analyzing trace with hash -998807061, now seen corresponding path program 5 times [2022-11-22 01:23:41,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:23:41,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673739683] [2022-11-22 01:23:41,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:23:41,579 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 [2022-11-22 01:23:41,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:23:41,579 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:23:41,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:23:41,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:23:41,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:23:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 01:23:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:42,066 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:23:42,066 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 [2022-11-22 01:23:42,796 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 [2022-11-22 01:23:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:42,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:43,395 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 8 treesize of output 6 [2022-11-22 01:23:43,421 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:23:43,425 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:23:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:47,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:23:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673739683] [2022-11-22 01:23:47,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673739683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2112100580] [2022-11-22 01:23:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:23:47,425 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:23:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:23:47,426 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:23:47,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-22 01:23:48,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:23:48,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:23:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:23:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:49,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:52,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2112100580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:52,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114543726] [2022-11-22 01:23:52,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:23:52,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:52,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:52,279 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:52,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-22 01:23:53,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:23:53,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:23:53,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:23:53,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:54,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114543726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:56,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:23:56,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-11-22 01:23:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555348292] [2022-11-22 01:23:56,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:23:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-22 01:23:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:23:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-22 01:23:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=4357, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 01:23:56,488 INFO L87 Difference]: Start difference. First operand 2660 states and 9452 transitions. Second operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:24:55,269 INFO L93 Difference]: Finished difference Result 3920 states and 12898 transitions. [2022-11-22 01:24:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-22 01:24:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 01:24:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:24:55,277 INFO L225 Difference]: With dead ends: 3920 [2022-11-22 01:24:55,277 INFO L226 Difference]: Without dead ends: 3920 [2022-11-22 01:24:55,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=2296, Invalid=12224, Unknown=0, NotChecked=0, Total=14520 [2022-11-22 01:24:55,279 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2964 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9719 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2964 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 9719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:24:55,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2964 Valid, 0 Invalid, 9864 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [145 Valid, 9719 Invalid, 0 Unknown, 0 Unchecked, 28.2s Time] [2022-11-22 01:24:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-11-22 01:24:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 2149. [2022-11-22 01:24:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2144 states have (on average 3.3521455223880596) internal successors, (7187), 2148 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 7187 transitions. [2022-11-22 01:24:55,339 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 7187 transitions. Word has length 16 [2022-11-22 01:24:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:24:55,339 INFO L495 AbstractCegarLoop]: Abstraction has 2149 states and 7187 transitions. [2022-11-22 01:24:55,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 7187 transitions. [2022-11-22 01:24:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:24:55,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:24:55,343 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:24:55,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:55,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:55,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:24:55,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:24:55,948 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:24:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:24:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash 138567161, now seen corresponding path program 3 times [2022-11-22 01:24:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:24:55,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779521258] [2022-11-22 01:24:55,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:24:55,949 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 [2022-11-22 01:24:55,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:24:55,951 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:24:55,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Waiting until timeout for monitored process [2022-11-22 01:24:56,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:24:56,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:24:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:24:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:56,551 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:24:56,561 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 [2022-11-22 01:24:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:24:57,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:24:57,225 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 8 treesize of output 6 [2022-11-22 01:24:57,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-22 01:24:57,261 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:24:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:24:58,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:24:58,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779521258] [2022-11-22 01:24:58,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779521258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:24:58,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [378036023] [2022-11-22 01:24:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:24:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:24:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:24:58,883 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:24:58,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-22 01:25:00,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:25:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:25:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:00,575 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:25:00,575 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 [2022-11-22 01:25:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:00,857 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 8 treesize of output 6 [2022-11-22 01:25:00,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-22 01:25:00,888 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:25:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:01,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [378036023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609625127] [2022-11-22 01:25:01,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:25:01,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:01,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:01,087 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:01,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-22 01:25:01,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:25:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:25:01,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:01,659 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:25:01,659 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 [2022-11-22 01:25:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:25:02,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:02,241 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 8 treesize of output 6 [2022-11-22 01:25:02,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-22 01:25:02,271 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:25:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:25:03,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609625127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:03,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:25:03,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 30 [2022-11-22 01:25:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342852421] [2022-11-22 01:25:03,637 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:03,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:25:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:25:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:25:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:25:03,640 INFO L87 Difference]: Start difference. First operand 2149 states and 7187 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:29,055 INFO L93 Difference]: Finished difference Result 3065 states and 9383 transitions. [2022-11-22 01:25:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:25:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 01:25:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:29,062 INFO L225 Difference]: With dead ends: 3065 [2022-11-22 01:25:29,062 INFO L226 Difference]: Without dead ends: 3065 [2022-11-22 01:25:29,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=487, Invalid=1963, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 01:25:29,063 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1014 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:29,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 0 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2022-11-22 01:25:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-11-22 01:25:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2465. [2022-11-22 01:25:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 2460 states have (on average 3.2914634146341464) internal successors, (8097), 2464 states have internal predecessors, (8097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 8097 transitions. [2022-11-22 01:25:29,131 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 8097 transitions. Word has length 16 [2022-11-22 01:25:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:29,132 INFO L495 AbstractCegarLoop]: Abstraction has 2465 states and 8097 transitions. [2022-11-22 01:25:29,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 8097 transitions. [2022-11-22 01:25:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:25:29,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:29,136 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:29,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:29,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-22 01:25:29,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:29,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:25:29,746 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:25:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1359356122, now seen corresponding path program 4 times [2022-11-22 01:25:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:25:29,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936653620] [2022-11-22 01:25:29,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:25:29,747 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 [2022-11-22 01:25:29,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:25:29,748 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:25:29,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Waiting until timeout for monitored process [2022-11-22 01:25:29,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:25:29,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:30,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:25:30,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:30,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:32,172 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 38 treesize of output 32 [2022-11-22 01:25:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:33,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:25:33,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936653620] [2022-11-22 01:25:33,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936653620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:33,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1538723141] [2022-11-22 01:25:33,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:25:33,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:25:33,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:25:33,386 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:25:33,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-22 01:25:33,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:25:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:25:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:34,060 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:25:34,061 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 [2022-11-22 01:25:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:35,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:39,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1538723141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:39,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309075291] [2022-11-22 01:25:39,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:25:39,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:39,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:39,125 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:39,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-22 01:25:39,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:25:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:39,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:25:39,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:39,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:25:39,493 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 [2022-11-22 01:25:41,666 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 [2022-11-22 01:25:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:41,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:42,018 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 8 treesize of output 6 [2022-11-22 01:25:42,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-22 01:25:42,069 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:25:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:49,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309075291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:49,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:25:49,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 71 [2022-11-22 01:25:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034699900] [2022-11-22 01:25:49,887 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-22 01:25:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:25:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-22 01:25:49,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=4687, Unknown=0, NotChecked=0, Total=5256 [2022-11-22 01:25:49,889 INFO L87 Difference]: Start difference. First operand 2465 states and 8097 transitions. Second operand has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:26:41,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:26:52,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:28:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:03,221 INFO L93 Difference]: Finished difference Result 13692 states and 44230 transitions. [2022-11-22 01:28:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-22 01:28:03,222 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 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 18 [2022-11-22 01:28:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:03,253 INFO L225 Difference]: With dead ends: 13692 [2022-11-22 01:28:03,254 INFO L226 Difference]: Without dead ends: 13692 [2022-11-22 01:28:03,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7052 ImplicationChecksByTransitivity, 101.0s TimeCoverageRelationStatistics Valid=3733, Invalid=20137, Unknown=0, NotChecked=0, Total=23870 [2022-11-22 01:28:03,256 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6057 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11218 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6057 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 11218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:03,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6057 Valid, 0 Invalid, 11321 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 11218 Invalid, 0 Unknown, 0 Unchecked, 48.1s Time] [2022-11-22 01:28:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13692 states. [2022-11-22 01:28:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13692 to 3656. [2022-11-22 01:28:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3651 states have (on average 3.5716242125445086) internal successors, (13040), 3655 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13040 transitions. [2022-11-22 01:28:03,427 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13040 transitions. Word has length 18 [2022-11-22 01:28:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:03,428 INFO L495 AbstractCegarLoop]: Abstraction has 3656 states and 13040 transitions. [2022-11-22 01:28:03,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13040 transitions. [2022-11-22 01:28:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:28:03,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:03,432 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:28:03,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:03,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:03,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:04,046 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:28:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:04,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1397212569, now seen corresponding path program 5 times [2022-11-22 01:28:04,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:28:04,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470804285] [2022-11-22 01:28:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:28:04,047 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 [2022-11-22 01:28:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:28:04,054 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:28:04,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-22 01:28:04,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:28:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 01:28:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:04,536 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:28:04,536 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 [2022-11-22 01:28:05,319 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 [2022-11-22 01:28:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:05,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:05,895 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 8 treesize of output 6 [2022-11-22 01:28:05,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-22 01:28:05,949 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 01:28:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:10,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:28:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470804285] [2022-11-22 01:28:10,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470804285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [624285635] [2022-11-22 01:28:10,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:28:10,880 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:28:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:28:10,883 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:28:10,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-22 01:28:11,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:28:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:28:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:13,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:16,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [624285635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:16,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569784887] [2022-11-22 01:28:16,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:28:16,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:16,518 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:16,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-22 01:28:17,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:28:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:17,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:28:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:19,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:21,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569784887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:21,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:28:21,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-11-22 01:28:21,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712862616] [2022-11-22 01:28:21,008 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:28:21,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-22 01:28:21,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:28:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-22 01:28:21,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=4345, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 01:28:21,011 INFO L87 Difference]: Start difference. First operand 3656 states and 13040 transitions. Second operand has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:20,520 INFO L93 Difference]: Finished difference Result 5108 states and 17032 transitions. [2022-11-22 01:29:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-22 01:29:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 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 18 [2022-11-22 01:29:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:20,534 INFO L225 Difference]: With dead ends: 5108 [2022-11-22 01:29:20,534 INFO L226 Difference]: Without dead ends: 5108 [2022-11-22 01:29:20,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4317 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=2286, Invalid=11994, Unknown=0, NotChecked=0, Total=14280 [2022-11-22 01:29:20,535 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2697 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10002 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2697 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 10002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:20,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2697 Valid, 0 Invalid, 10138 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [136 Valid, 10002 Invalid, 0 Unknown, 0 Unchecked, 28.4s Time] [2022-11-22 01:29:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2022-11-22 01:29:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 3117. [2022-11-22 01:29:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3112 states have (on average 3.363431876606684) internal successors, (10467), 3116 states have internal predecessors, (10467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 10467 transitions. [2022-11-22 01:29:20,665 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 10467 transitions. Word has length 18 [2022-11-22 01:29:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:20,666 INFO L495 AbstractCegarLoop]: Abstraction has 3117 states and 10467 transitions. [2022-11-22 01:29:20,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 10467 transitions. [2022-11-22 01:29:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:29:20,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:20,673 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-22 01:29:20,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:20,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:21,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-22 01:29:21,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:29:21,294 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:29:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:21,295 INFO L85 PathProgramCache]: Analyzing trace with hash -708392712, now seen corresponding path program 4 times [2022-11-22 01:29:21,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:29:21,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354698110] [2022-11-22 01:29:21,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:29:21,295 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 [2022-11-22 01:29:21,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:29:21,297 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:29:21,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-22 01:29:21,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:29:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:21,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-22 01:29:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:21,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:29:21,716 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 [2022-11-22 01:29:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:23,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:37,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:29:37,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354698110] [2022-11-22 01:29:37,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354698110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:37,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1760209130] [2022-11-22 01:29:37,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:29:37,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:29:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:29:37,500 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:29:37,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-22 01:29:38,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:29:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 01:29:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:38,345 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:29:38,345 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 [2022-11-22 01:29:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:39,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:41,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1760209130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:41,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955090075] [2022-11-22 01:29:41,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:29:41,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:41,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:41,534 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:41,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c6587d-c178-40e3-869b-face90739f00/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-22 01:29:41,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:29:41,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:41,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 01:29:41,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:42,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:29:42,028 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 [2022-11-22 01:29:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:44,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:46,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955090075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:46,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:29:46,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 63 [2022-11-22 01:29:46,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6252157] [2022-11-22 01:29:46,279 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-22 01:29:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:29:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-22 01:29:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=3080, Unknown=0, NotChecked=0, Total=4160 [2022-11-22 01:29:46,282 INFO L87 Difference]: Start difference. First operand 3117 states and 10467 transitions. Second operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 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) [2022-11-22 01:30:27,711 WARN L233 SmtUtils]: Spent 23.66s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:30:47,538 WARN L233 SmtUtils]: Spent 16.86s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:31:03,838 WARN L233 SmtUtils]: Spent 13.60s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:31:48,288 WARN L233 SmtUtils]: Spent 42.74s on a formula simplification. DAG size of input: 254 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:32:04,680 WARN L233 SmtUtils]: Spent 13.88s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)