./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.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_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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_100daa16-9549-4778-9950-32d472a31cab/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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- 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 02:04:30,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:04:30,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:04:31,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:04:31,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:04:31,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:04:31,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:04:31,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:04:31,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:04:31,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:04:31,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:04:31,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:04:31,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:04:31,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:04:31,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:04:31,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:04:31,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:04:31,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:04:31,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:04:31,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:04:31,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:04:31,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:04:31,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:04:31,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:04:31,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:04:31,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:04:31,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:04:31,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:04:31,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:04:31,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:04:31,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:04:31,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:04:31,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:04:31,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:04:31,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:04:31,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:04:31,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:04:31,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:04:31,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:04:31,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:04:31,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:04:31,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:04:31,085 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:04:31,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:04:31,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:04:31,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:04:31,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:04:31,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:04:31,088 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:04:31,088 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:04:31,089 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:04:31,089 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:04:31,089 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:04:31,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:04:31,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:04:31,090 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:04:31,090 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:04:31,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:04:31,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:04:31,091 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:04:31,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:04:31,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:04:31,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:04:31,093 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:04:31,094 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:04:31,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:04:31,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:04:31,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:04:31,095 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:04:31,095 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:04:31,096 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:04:31,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:04:31,096 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:04:31,096 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:04:31,097 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:04:31,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:04:31,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:04:31,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:04:31,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:04:31,098 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:04:31,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:04:31,099 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:04:31,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:04:31,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:04:31,099 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_100daa16-9549-4778-9950-32d472a31cab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-11-22 02:04:31,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:04:31,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:04:31,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:04:31,443 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:04:31,444 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:04:31,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-22 02:04:34,600 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:04:34,887 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:04:34,887 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-22 02:04:34,896 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data/bf3267d35/3454d5a9559342b6a444035200f02a05/FLAGca35c35fe [2022-11-22 02:04:34,915 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data/bf3267d35/3454d5a9559342b6a444035200f02a05 [2022-11-22 02:04:34,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:04:34,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:04:34,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:04:34,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:04:34,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:04:34,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:04:34" (1/1) ... [2022-11-22 02:04:34,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f7cf8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:34, skipping insertion in model container [2022-11-22 02:04:34,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:04:34" (1/1) ... [2022-11-22 02:04:34,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:04:34,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:04:35,186 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_100daa16-9549-4778-9950-32d472a31cab/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-22 02:04:35,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:04:35,210 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 02:04:35,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@113dec45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:35, skipping insertion in model container [2022-11-22 02:04:35,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:04:35,212 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 02:04:35,213 INFO L158 Benchmark]: Toolchain (without parser) took 288.98ms. Allocated memory is still 186.6MB. Free memory was 153.4MB in the beginning and 143.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 02:04:35,214 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 151.0MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:04:35,215 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.62ms. Allocated memory is still 186.6MB. Free memory was 153.4MB in the beginning and 143.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 02:04:35,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 151.0MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 280.62ms. Allocated memory is still 186.6MB. Free memory was 153.4MB in the beginning and 143.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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_100daa16-9549-4778-9950-32d472a31cab/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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- 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 02:04:37,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:04:37,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:04:37,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:04:37,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:04:37,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:04:37,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:04:37,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:04:37,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:04:37,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:04:37,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:04:37,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:04:37,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:04:37,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:04:37,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:04:37,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:04:37,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:04:37,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:04:37,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:04:37,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:04:37,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:04:37,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:04:37,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:04:37,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:04:37,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:04:37,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:04:37,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:04:37,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:04:37,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:04:37,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:04:37,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:04:37,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:04:37,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:04:37,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:04:37,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:04:37,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:04:37,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:04:37,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:04:37,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:04:37,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:04:37,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:04:37,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 02:04:37,935 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:04:37,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:04:37,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:04:37,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:04:37,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:04:37,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:04:37,939 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:04:37,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:04:37,939 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:04:37,939 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:04:37,941 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:04:37,941 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:04:37,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:04:37,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:04:37,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:04:37,943 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:04:37,943 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:04:37,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:04:37,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:04:37,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:04:37,944 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:04:37,944 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:04:37,945 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:04:37,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:04:37,945 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:04:37,946 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:04:37,946 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:04:37,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:04:37,946 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:04:37,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:04:37,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:04:37,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:04:37,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:04:37,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:04:37,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:04:37,949 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:04:37,949 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:04:37,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:04:37,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:04:37,950 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_100daa16-9549-4778-9950-32d472a31cab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-11-22 02:04:38,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:04:38,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:04:38,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:04:38,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:04:38,432 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:04:38,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-22 02:04:41,752 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:04:42,061 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:04:42,062 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-22 02:04:42,069 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data/6af1b4bbd/c06a253b3e1c4b3f85f08186f6752601/FLAGf739801c6 [2022-11-22 02:04:42,084 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/data/6af1b4bbd/c06a253b3e1c4b3f85f08186f6752601 [2022-11-22 02:04:42,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:04:42,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:04:42,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:04:42,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:04:42,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:04:42,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0eac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42, skipping insertion in model container [2022-11-22 02:04:42,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:04:42,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:04:42,325 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_100daa16-9549-4778-9950-32d472a31cab/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-22 02:04:42,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:04:42,377 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 02:04:42,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:04:42,428 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_100daa16-9549-4778-9950-32d472a31cab/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-22 02:04:42,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:04:42,453 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:04:42,496 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_100daa16-9549-4778-9950-32d472a31cab/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-22 02:04:42,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:04:42,538 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:04:42,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42 WrapperNode [2022-11-22 02:04:42,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:04:42,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:04:42,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:04:42,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:04:42,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,667 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-11-22 02:04:42,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:04:42,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:04:42,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:04:42,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:04:42,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,737 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:04:42,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:04:42,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:04:42,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:04:42,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (1/1) ... [2022-11-22 02:04:42,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:04:42,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:04:42,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:04:42,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 02:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 02:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 02:04:42,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 02:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 02:04:42,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 02:04:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 02:04:42,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 02:04:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 02:04:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 02:04:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:04:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:04:42,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:04:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:04:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 02:04:42,872 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 02:04:43,063 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:04:43,066 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:04:43,744 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:04:43,872 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:04:43,872 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 02:04:43,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:04:43 BoogieIcfgContainer [2022-11-22 02:04:43,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:04:43,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:04:43,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:04:43,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:04:43,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:04:42" (1/3) ... [2022-11-22 02:04:43,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265f7fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:04:43, skipping insertion in model container [2022-11-22 02:04:43,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:04:42" (2/3) ... [2022-11-22 02:04:43,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265f7fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:04:43, skipping insertion in model container [2022-11-22 02:04:43,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:04:43" (3/3) ... [2022-11-22 02:04:43,883 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-11-22 02:04:43,920 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:04:43,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-22 02:04:43,921 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 02:04:44,039 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-22 02:04:44,096 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 02:04:44,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-22 02:04:44,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-22 02:04:44,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-11-22 02:04:44,263 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-11-22 02:04:44,263 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-22 02:04:44,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-11-22 02:04:44,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-22 02:05:16,929 INFO L134 LiptonReduction]: Checked pairs total: 3576 [2022-11-22 02:05:16,929 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-11-22 02:05:16,938 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-11-22 02:05:17,068 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states 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 02:05:17,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:05:17,102 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;@3e49e03a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:05:17,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-22 02:05:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states 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 02:05:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:05:17,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:17,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:05:17,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash 23267, now seen corresponding path program 1 times [2022-11-22 02:05:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:17,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169322315] [2022-11-22 02:05:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:17,142 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 02:05:17,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:17,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:17,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:05:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:17,503 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:05:17,504 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 02:05:17,546 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 02:05:17,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:17,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:17,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169322315] [2022-11-22 02:05:17,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169322315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:17,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:05:17,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:05:17,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467726649] [2022-11-22 02:05:17,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:17,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:17,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:17,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:05:17,604 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 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 02:05:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:17,886 INFO L93 Difference]: Finished difference Result 748 states and 2564 transitions. [2022-11-22 02:05:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:17,888 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 02:05:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:17,910 INFO L225 Difference]: With dead ends: 748 [2022-11-22 02:05:17,910 INFO L226 Difference]: Without dead ends: 748 [2022-11-22 02:05:17,911 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 02:05:17,915 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:17,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:05:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-22 02:05:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-22 02:05:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 616 states have (on average 4.162337662337662) internal successors, (2564), 747 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 02:05:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2564 transitions. [2022-11-22 02:05:18,003 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2564 transitions. Word has length 2 [2022-11-22 02:05:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:18,004 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2564 transitions. [2022-11-22 02:05:18,005 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 02:05:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2564 transitions. [2022-11-22 02:05:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:05:18,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:18,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:05:18,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:18,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:18,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 23268, now seen corresponding path program 1 times [2022-11-22 02:05:18,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:18,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199045978] [2022-11-22 02:05:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:18,207 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 02:05:18,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:18,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:18,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:05:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:18,438 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:18,439 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 02:05:18,497 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 02:05:18,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:18,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:18,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199045978] [2022-11-22 02:05:18,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199045978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:18,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:05:18,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:05:18,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328586666] [2022-11-22 02:05:18,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:18,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:18,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:05:18,501 INFO L87 Difference]: Start difference. First operand 748 states and 2564 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 02:05:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:18,943 INFO L93 Difference]: Finished difference Result 1494 states and 5126 transitions. [2022-11-22 02:05:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:18,944 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 02:05:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:18,956 INFO L225 Difference]: With dead ends: 1494 [2022-11-22 02:05:18,956 INFO L226 Difference]: Without dead ends: 1494 [2022-11-22 02:05:18,956 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 02:05:18,957 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:18,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:05:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-22 02:05:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 749. [2022-11-22 02:05:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 748 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states 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 02:05:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2568 transitions. [2022-11-22 02:05:19,014 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2568 transitions. Word has length 2 [2022-11-22 02:05:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:19,015 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2568 transitions. [2022-11-22 02:05:19,015 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 02:05:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2568 transitions. [2022-11-22 02:05:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:05:19,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:19,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:05:19,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 23423, now seen corresponding path program 1 times [2022-11-22 02:05:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:19,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474436012] [2022-11-22 02:05:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:19,229 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 02:05:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:19,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:05:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:19,355 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 02:05:19,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:19,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474436012] [2022-11-22 02:05:19,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474436012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:19,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:05:19,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:05:19,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514211470] [2022-11-22 02:05:19,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:19,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:19,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:19,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:05:19,357 INFO L87 Difference]: Start difference. First operand 749 states and 2568 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 02:05:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:19,608 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-22 02:05:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:19,609 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 02:05:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:19,614 INFO L225 Difference]: With dead ends: 749 [2022-11-22 02:05:19,614 INFO L226 Difference]: Without dead ends: 749 [2022-11-22 02:05:19,615 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 02:05:19,618 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:19,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:05:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-22 02:05:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-22 02:05:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states 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 02:05:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-22 02:05:19,657 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-22 02:05:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:19,657 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-22 02:05:19,657 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 02:05:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-22 02:05:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:05:19,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:19,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:05:19,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:19,870 INFO L85 PathProgramCache]: Analyzing trace with hash 725604, now seen corresponding path program 1 times [2022-11-22 02:05:19,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:19,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056947570] [2022-11-22 02:05:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:19,871 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 02:05:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:19,872 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:05:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:20,090 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:20,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:05:20,181 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 02:05:20,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:20,456 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 02:05:20,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056947570] [2022-11-22 02:05:20,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056947570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262127980] [2022-11-22 02:05:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:20,457 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:20,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:05:20,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:05:20,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-22 02:05:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:05:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:20,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:20,779 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 02:05:20,821 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 02:05:20,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:20,916 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 02:05:20,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262127980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:20,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771976038] [2022-11-22 02:05:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:20,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:20,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:20,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:20,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:05:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:05:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:21,158 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:21,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:05:21,214 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 02:05:21,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:21,371 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 02:05:21,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771976038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:21,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:05:21,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-22 02:05:21,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052375335] [2022-11-22 02:05:21,372 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:21,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:05:21,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:05:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:05:21,373 INFO L87 Difference]: Start difference. First operand 749 states and 2565 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:23,483 INFO L93 Difference]: Finished difference Result 2242 states and 7693 transitions. [2022-11-22 02:05:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:05:23,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:05:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:23,501 INFO L225 Difference]: With dead ends: 2242 [2022-11-22 02:05:23,502 INFO L226 Difference]: Without dead ends: 2242 [2022-11-22 02:05:23,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:05:23,503 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 277 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:23,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 15 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 02:05:23,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-11-22 02:05:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 752. [2022-11-22 02:05:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 620 states have (on average 4.156451612903226) internal successors, (2577), 751 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states 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 02:05:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2577 transitions. [2022-11-22 02:05:23,561 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2577 transitions. Word has length 3 [2022-11-22 02:05:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:23,561 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2577 transitions. [2022-11-22 02:05:23,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2577 transitions. [2022-11-22 02:05:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:05:23,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:23,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:05:23,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:05:23,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:23,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:24,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash 725759, now seen corresponding path program 1 times [2022-11-22 02:05:24,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:24,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200322809] [2022-11-22 02:05:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:24,170 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 02:05:24,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:24,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:24,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Waiting until timeout for monitored process [2022-11-22 02:05:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:05:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:24,357 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-22 02:05:24,358 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 51 [2022-11-22 02:05:24,431 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 02:05:24,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:24,432 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200322809] [2022-11-22 02:05:24,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200322809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:24,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:05:24,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:05:24,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835767796] [2022-11-22 02:05:24,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:24,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:24,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:24,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:05:24,468 INFO L87 Difference]: Start difference. First operand 752 states and 2577 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 02:05:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:24,795 INFO L93 Difference]: Finished difference Result 626 states and 2073 transitions. [2022-11-22 02:05:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:24,796 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 02:05:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:24,800 INFO L225 Difference]: With dead ends: 626 [2022-11-22 02:05:24,801 INFO L226 Difference]: Without dead ends: 626 [2022-11-22 02:05:24,801 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 02:05:24,802 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:24,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:05:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-11-22 02:05:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2022-11-22 02:05:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 522 states have (on average 3.971264367816092) internal successors, (2073), 625 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states 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 02:05:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2073 transitions. [2022-11-22 02:05:24,831 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2073 transitions. Word has length 3 [2022-11-22 02:05:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:24,832 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 2073 transitions. [2022-11-22 02:05:24,832 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 02:05:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2073 transitions. [2022-11-22 02:05:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:05:24,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:24,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:05:24,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Ended with exit code 0 [2022-11-22 02:05:25,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:25,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash 725760, now seen corresponding path program 1 times [2022-11-22 02:05:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:25,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166621938] [2022-11-22 02:05:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:25,045 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 02:05:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:25,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:25,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:05:25,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:25,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:25,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:25,276 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:05:25,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-22 02:05:25,311 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-22 02:05:25,311 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 02:05:25,400 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 02:05:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:05:25,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:25,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166621938] [2022-11-22 02:05:25,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166621938] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:05:25,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:05:25,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-22 02:05:25,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955508093] [2022-11-22 02:05:25,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:05:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:05:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:05:25,542 INFO L87 Difference]: Start difference. First operand 626 states and 2073 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:25,774 INFO L93 Difference]: Finished difference Result 500 states and 1569 transitions. [2022-11-22 02:05:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:05:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:25,779 INFO L225 Difference]: With dead ends: 500 [2022-11-22 02:05:25,779 INFO L226 Difference]: Without dead ends: 500 [2022-11-22 02:05:25,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:05:25,780 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:25,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:05:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-22 02:05:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-11-22 02:05:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.7004716981132075) internal successors, (1569), 499 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states 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 02:05:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1569 transitions. [2022-11-22 02:05:25,807 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1569 transitions. Word has length 3 [2022-11-22 02:05:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:25,807 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1569 transitions. [2022-11-22 02:05:25,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1569 transitions. [2022-11-22 02:05:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:05:25,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:25,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:05:25,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:26,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:26,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash 697470199, now seen corresponding path program 1 times [2022-11-22 02:05:26,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912528308] [2022-11-22 02:05:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:26,021 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 02:05:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:26,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:26,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:26,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:05:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:26,275 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-22 02:05:26,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-22 02:05:26,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-22 02:05:26,563 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 02:05:26,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:26,835 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 02:05:26,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912528308] [2022-11-22 02:05:26,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912528308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1283236965] [2022-11-22 02:05:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:26,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:26,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:05:26,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:05:26,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-22 02:05:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:05:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:27,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:27,153 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-22 02:05:27,153 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 02:05:27,172 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 39 treesize of output 37 [2022-11-22 02:05:27,289 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 02:05:27,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:27,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1283236965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:27,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:05:27,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-22 02:05:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454559435] [2022-11-22 02:05:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:27,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:05:27,292 INFO L87 Difference]: Start difference. First operand 500 states and 1569 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 02:05:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:27,478 INFO L93 Difference]: Finished difference Result 470 states and 1484 transitions. [2022-11-22 02:05:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:27,480 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 02:05:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:27,483 INFO L225 Difference]: With dead ends: 470 [2022-11-22 02:05:27,483 INFO L226 Difference]: Without dead ends: 470 [2022-11-22 02:05:27,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:05:27,484 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:27,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:05:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-22 02:05:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-11-22 02:05:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6551724137931036) internal successors, (1484), 469 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states 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 02:05:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1484 transitions. [2022-11-22 02:05:27,501 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1484 transitions. Word has length 5 [2022-11-22 02:05:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:27,502 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1484 transitions. [2022-11-22 02:05:27,502 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 02:05:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1484 transitions. [2022-11-22 02:05:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:05:27,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:27,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:05:27,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:27,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:27,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash 697470198, now seen corresponding path program 1 times [2022-11-22 02:05:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932662880] [2022-11-22 02:05:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:27,925 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 02:05:27,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:27,926 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:27,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:05:28,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:28,111 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 02:05:28,111 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 02:05:28,247 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 02:05:28,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:28,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:28,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932662880] [2022-11-22 02:05:28,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932662880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:28,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:05:28,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:05:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974925137] [2022-11-22 02:05:28,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:28,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:28,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:05:28,250 INFO L87 Difference]: Start difference. First operand 470 states and 1484 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 02:05:28,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:28,425 INFO L93 Difference]: Finished difference Result 440 states and 1399 transitions. [2022-11-22 02:05:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:28,426 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 02:05:28,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:28,429 INFO L225 Difference]: With dead ends: 440 [2022-11-22 02:05:28,429 INFO L226 Difference]: Without dead ends: 440 [2022-11-22 02:05:28,430 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 02:05:28,430 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:28,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:05:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-22 02:05:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-22 02:05:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6056701030927836) internal successors, (1399), 439 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states 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 02:05:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1399 transitions. [2022-11-22 02:05:28,446 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1399 transitions. Word has length 5 [2022-11-22 02:05:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:28,447 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1399 transitions. [2022-11-22 02:05:28,447 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 02:05:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1399 transitions. [2022-11-22 02:05:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:05:28,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:28,448 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 02:05:28,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:28,660 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 145898212, now seen corresponding path program 2 times [2022-11-22 02:05:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918021975] [2022-11-22 02:05:28,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:05:28,661 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 02:05:28,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:28,662 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:28,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:28,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:05:28,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:05:28,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:05:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:28,911 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:28,911 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 02:05:29,096 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 02:05:29,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:29,820 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 02:05:29,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918021975] [2022-11-22 02:05:29,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918021975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929736317] [2022-11-22 02:05:29,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:05:29,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:29,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:05:29,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:05:29,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-22 02:05:30,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:05:30,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:05:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:05:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:30,198 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:30,199 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 02:05:30,313 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 02:05:30,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:31,282 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 02:05:31,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929736317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:31,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87844511] [2022-11-22 02:05:31,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:05:31,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:31,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:31,288 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:31,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:05:31,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:05:31,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:05:31,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:05:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:31,569 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:31,570 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 02:05:31,666 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 02:05:31,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:31,845 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 02:05:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87844511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:31,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:05:31,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-22 02:05:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559676214] [2022-11-22 02:05:31,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:05:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:05:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:05:31,846 INFO L87 Difference]: Start difference. First operand 440 states and 1399 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:37,368 INFO L93 Difference]: Finished difference Result 3910 states and 12515 transitions. [2022-11-22 02:05:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:05:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 02:05:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:37,399 INFO L225 Difference]: With dead ends: 3910 [2022-11-22 02:05:37,400 INFO L226 Difference]: Without dead ends: 3910 [2022-11-22 02:05:37,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:05:37,401 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1024 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:37,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 90 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-22 02:05:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2022-11-22 02:05:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 446. [2022-11-22 02:05:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 394 states have (on average 3.581218274111675) internal successors, (1411), 445 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states 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 02:05:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1411 transitions. [2022-11-22 02:05:37,469 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1411 transitions. Word has length 6 [2022-11-22 02:05:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:37,469 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1411 transitions. [2022-11-22 02:05:37,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1411 transitions. [2022-11-22 02:05:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:05:37,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:37,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:05:37,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-11-22 02:05:37,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:37,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:38,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:38,074 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:38,074 INFO L85 PathProgramCache]: Analyzing trace with hash 146734139, now seen corresponding path program 1 times [2022-11-22 02:05:38,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:38,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219854598] [2022-11-22 02:05:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:38,075 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 02:05:38,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:38,076 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:38,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:38,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:05:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:38,267 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:05:38,267 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 02:05:38,291 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 02:05:38,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:38,292 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:38,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219854598] [2022-11-22 02:05:38,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219854598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:38,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:05:38,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:05:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669150662] [2022-11-22 02:05:38,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:38,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:05:38,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:38,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:05:38,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:05:38,293 INFO L87 Difference]: Start difference. First operand 446 states and 1411 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:38,452 INFO L93 Difference]: Finished difference Result 264 states and 810 transitions. [2022-11-22 02:05:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:05:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 02:05:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:38,454 INFO L225 Difference]: With dead ends: 264 [2022-11-22 02:05:38,455 INFO L226 Difference]: Without dead ends: 264 [2022-11-22 02:05:38,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:05:38,456 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:38,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:05:38,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-22 02:05:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-22 02:05:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 243 states have (on average 3.3333333333333335) internal successors, (810), 263 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 02:05:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 810 transitions. [2022-11-22 02:05:38,465 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 810 transitions. Word has length 6 [2022-11-22 02:05:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:38,465 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 810 transitions. [2022-11-22 02:05:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 810 transitions. [2022-11-22 02:05:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:05:38,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:38,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:05:38,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:38,678 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 146734140, now seen corresponding path program 1 times [2022-11-22 02:05:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6040200] [2022-11-22 02:05:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:38,679 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 02:05:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:38,680 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:38,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (17)] Waiting until timeout for monitored process [2022-11-22 02:05:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:05:38,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:38,863 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 02:05:38,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:39,084 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 25 treesize of output 21 [2022-11-22 02:05:39,151 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 02:05:39,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6040200] [2022-11-22 02:05:39,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6040200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661188729] [2022-11-22 02:05:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:39,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:39,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:05:39,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:05:39,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-22 02:05:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:05:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:39,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:39,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:05:39,731 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 02:05:39,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:40,049 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 02:05:40,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [661188729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:40,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785296849] [2022-11-22 02:05:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:40,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:40,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:40,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:40,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:05:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:05:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:40,270 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:40,271 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 02:05:40,370 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 02:05:40,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:40,470 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 02:05:40,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785296849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:40,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:05:40,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-22 02:05:40,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383654329] [2022-11-22 02:05:40,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:40,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:05:40,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:05:40,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:05:40,472 INFO L87 Difference]: Start difference. First operand 264 states and 810 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 02:05:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:42,334 INFO L93 Difference]: Finished difference Result 1216 states and 3758 transitions. [2022-11-22 02:05:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:05:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 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 02:05:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:42,343 INFO L225 Difference]: With dead ends: 1216 [2022-11-22 02:05:42,343 INFO L226 Difference]: Without dead ends: 1216 [2022-11-22 02:05:42,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:05:42,344 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 544 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:42,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 36 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 02:05:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-11-22 02:05:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 314. [2022-11-22 02:05:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4948805460750854) internal successors, (1024), 313 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:05:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1024 transitions. [2022-11-22 02:05:42,363 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1024 transitions. Word has length 6 [2022-11-22 02:05:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:42,364 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1024 transitions. [2022-11-22 02:05:42,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 02:05:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1024 transitions. [2022-11-22 02:05:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:05:42,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:42,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:42,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (17)] Ended with exit code 0 [2022-11-22 02:05:42,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:42,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:42,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:42,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash 253794113, now seen corresponding path program 1 times [2022-11-22 02:05:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:42,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173485264] [2022-11-22 02:05:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:42,979 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 02:05:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:42,980 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:42,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:05:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:43,228 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:43,228 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 02:05:43,418 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 02:05:43,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:43,910 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 02:05:43,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:43,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173485264] [2022-11-22 02:05:43,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173485264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:43,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2114163126] [2022-11-22 02:05:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:43,911 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:43,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:05:43,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:05:43,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-22 02:05:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:05:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:44,344 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 02:05:44,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:44,623 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 02:05:44,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2114163126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:44,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777335943] [2022-11-22 02:05:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:44,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:44,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:44,625 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:44,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 02:05:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:44,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:05:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:44,794 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 02:05:44,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:44,823 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 02:05:44,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777335943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:44,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:05:44,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-22 02:05:44,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362333156] [2022-11-22 02:05:44,824 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:44,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:05:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:05:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:05:44,825 INFO L87 Difference]: Start difference. First operand 314 states and 1024 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:48,806 INFO L93 Difference]: Finished difference Result 815 states and 2597 transitions. [2022-11-22 02:05:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:05:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:05:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:48,811 INFO L225 Difference]: With dead ends: 815 [2022-11-22 02:05:48,812 INFO L226 Difference]: Without dead ends: 815 [2022-11-22 02:05:48,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:05:48,813 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 619 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:48,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 62 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 02:05:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-22 02:05:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 615. [2022-11-22 02:05:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 594 states have (on average 3.5505050505050506) internal successors, (2109), 614 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states 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 02:05:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2109 transitions. [2022-11-22 02:05:48,847 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2109 transitions. Word has length 7 [2022-11-22 02:05:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:48,848 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2109 transitions. [2022-11-22 02:05:48,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2109 transitions. [2022-11-22 02:05:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:05:48,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:48,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:48,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:49,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:49,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:49,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash 253977843, now seen corresponding path program 1 times [2022-11-22 02:05:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476670255] [2022-11-22 02:05:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:49,453 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 02:05:49,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:49,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:49,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:49,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:05:49,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:49,645 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 02:05:49,647 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 02:05:49,683 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 02:05:49,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:49,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476670255] [2022-11-22 02:05:49,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476670255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:49,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:05:49,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:05:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855740584] [2022-11-22 02:05:49,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:49,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:05:49,686 INFO L87 Difference]: Start difference. First operand 615 states and 2109 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 02:05:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:49,828 INFO L93 Difference]: Finished difference Result 567 states and 1957 transitions. [2022-11-22 02:05:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:49,829 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 02:05:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:49,832 INFO L225 Difference]: With dead ends: 567 [2022-11-22 02:05:49,833 INFO L226 Difference]: Without dead ends: 567 [2022-11-22 02:05:49,833 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 02:05:49,834 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 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 02:05:49,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:05:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-22 02:05:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-11-22 02:05:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 552 states have (on average 3.545289855072464) internal successors, (1957), 566 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states 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 02:05:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1957 transitions. [2022-11-22 02:05:49,852 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1957 transitions. Word has length 7 [2022-11-22 02:05:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:49,852 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1957 transitions. [2022-11-22 02:05:49,852 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 02:05:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1957 transitions. [2022-11-22 02:05:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:05:49,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:49,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:49,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:50,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:50,065 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash 253977844, now seen corresponding path program 1 times [2022-11-22 02:05:50,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:50,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371470453] [2022-11-22 02:05:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:50,067 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 02:05:50,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:50,068 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:50,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (24)] Waiting until timeout for monitored process [2022-11-22 02:05:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:05:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:50,361 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:50,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:05:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:05:50,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:50,849 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 02:05:50,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:50,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371470453] [2022-11-22 02:05:50,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371470453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:50,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1152943729] [2022-11-22 02:05:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:50,850 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:50,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:05:50,851 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:05:50,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-22 02:05:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:51,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:05:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:51,191 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-22 02:05:51,191 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 02:05:51,316 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 02:05:51,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:05:51,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1152943729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:05:51,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:05:51,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-22 02:05:51,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079990635] [2022-11-22 02:05:51,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:05:51,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:05:51,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:05:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:05:51,317 INFO L87 Difference]: Start difference. First operand 567 states and 1957 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 02:05:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:51,476 INFO L93 Difference]: Finished difference Result 519 states and 1805 transitions. [2022-11-22 02:05:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:05:51,477 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 02:05:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:51,480 INFO L225 Difference]: With dead ends: 519 [2022-11-22 02:05:51,480 INFO L226 Difference]: Without dead ends: 519 [2022-11-22 02:05:51,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:05:51,481 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:51,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:05:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-22 02:05:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-11-22 02:05:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 510 states have (on average 3.5392156862745097) internal successors, (1805), 518 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states 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 02:05:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1805 transitions. [2022-11-22 02:05:51,498 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1805 transitions. Word has length 7 [2022-11-22 02:05:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:51,498 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1805 transitions. [2022-11-22 02:05:51,498 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 02:05:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1805 transitions. [2022-11-22 02:05:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:05:51,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:51,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:51,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:51,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:51,903 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash -716626654, now seen corresponding path program 1 times [2022-11-22 02:05:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255868068] [2022-11-22 02:05:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:51,904 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 02:05:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:51,905 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:51,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:52,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:05:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:52,103 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 02:05:52,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:52,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-22 02:05:52,449 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 02:05:52,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:05:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255868068] [2022-11-22 02:05:52,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255868068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1475571349] [2022-11-22 02:05:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:05:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:05:52,455 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:05:52,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-22 02:05:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:52,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:05:52,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:52,921 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 02:05:52,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:53,212 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 02:05:53,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1475571349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:53,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751901236] [2022-11-22 02:05:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:53,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:53,213 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:53,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-22 02:05:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:05:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:53,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:05:53,484 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 02:05:53,854 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 02:05:53,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:54,351 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 02:05:54,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751901236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:54,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:05:54,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 22 [2022-11-22 02:05:54,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398903937] [2022-11-22 02:05:54,352 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:54,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:05:54,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:05:54,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:05:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:05:54,353 INFO L87 Difference]: Start difference. First operand 519 states and 1805 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:59,343 INFO L93 Difference]: Finished difference Result 1306 states and 4520 transitions. [2022-11-22 02:05:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:05:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 02:05:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:59,350 INFO L225 Difference]: With dead ends: 1306 [2022-11-22 02:05:59,350 INFO L226 Difference]: Without dead ends: 1306 [2022-11-22 02:05:59,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:05:59,353 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 729 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:59,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 55 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 02:05:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-22 02:05:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 615. [2022-11-22 02:05:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 606 states have (on average 3.6056105610561056) internal successors, (2185), 614 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states 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 02:05:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2185 transitions. [2022-11-22 02:05:59,377 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2185 transitions. Word has length 8 [2022-11-22 02:05:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:59,377 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2185 transitions. [2022-11-22 02:05:59,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2185 transitions. [2022-11-22 02:05:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:05:59,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:59,379 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:59,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:59,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:05:59,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:59,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:59,982 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:05:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2084266238, now seen corresponding path program 1 times [2022-11-22 02:05:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:05:59,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626117212] [2022-11-22 02:05:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:59,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:05:59,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:05:59,984 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:06:00,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Waiting until timeout for monitored process [2022-11-22 02:06:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:06:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:00,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:00,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-22 02:06:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:00,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:06:00,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626117212] [2022-11-22 02:06:00,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626117212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:00,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [506643692] [2022-11-22 02:06:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:00,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:06:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:06:00,809 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:06:00,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-22 02:06:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:01,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:06:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:01,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:02,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [506643692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:02,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454867965] [2022-11-22 02:06:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:02,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:02,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:06:02,028 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:06:02,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-22 02:06:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:06:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:02,293 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:06:02,294 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 02:06:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:02,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:03,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454867965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:03,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:06:03,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 33 [2022-11-22 02:06:03,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813267742] [2022-11-22 02:06:03,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:06:03,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 02:06:03,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:06:03,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 02:06:03,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:06:03,749 INFO L87 Difference]: Start difference. First operand 615 states and 2185 transitions. Second operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:06:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:18,384 INFO L93 Difference]: Finished difference Result 2906 states and 10178 transitions. [2022-11-22 02:06:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 02:06:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 02:06:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:18,395 INFO L225 Difference]: With dead ends: 2906 [2022-11-22 02:06:18,396 INFO L226 Difference]: Without dead ends: 2906 [2022-11-22 02:06:18,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=753, Invalid=3537, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 02:06:18,397 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2171 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2171 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:18,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2171 Valid, 158 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-22 02:06:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-11-22 02:06:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 966. [2022-11-22 02:06:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 957 states have (on average 3.820271682340648) internal successors, (3656), 965 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states 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 02:06:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3656 transitions. [2022-11-22 02:06:18,464 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3656 transitions. Word has length 10 [2022-11-22 02:06:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:18,464 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 3656 transitions. [2022-11-22 02:06:18,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:06:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3656 transitions. [2022-11-22 02:06:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:06:18,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:18,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:06:18,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:18,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-22 02:06:18,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-22 02:06:19,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:19,081 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:06:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1477967732, now seen corresponding path program 1 times [2022-11-22 02:06:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:06:19,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375794054] [2022-11-22 02:06:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:19,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:06:19,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:06:19,083 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:06:19,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (32)] Waiting until timeout for monitored process [2022-11-22 02:06:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:19,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:06:19,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:19,333 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:06:19,334 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 02:06:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:19,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:20,351 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 02:06:20,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:06:20,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375794054] [2022-11-22 02:06:20,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375794054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:20,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1763251] [2022-11-22 02:06:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:06:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:06:20,352 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:06:20,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-22 02:06:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:20,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:06:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:20,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:06:20,716 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 02:06:21,073 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 02:06:21,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:21,661 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 02:06:21,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1763251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:21,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326981018] [2022-11-22 02:06:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:21,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:21,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:06:21,663 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:06:21,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-22 02:06:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:06:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:21,924 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:06:21,924 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 02:06:22,087 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 02:06:22,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:22,413 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 02:06:22,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326981018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:22,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:06:22,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-22 02:06:22,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607346095] [2022-11-22 02:06:22,413 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:06:22,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:06:22,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:06:22,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:06:22,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:06:22,415 INFO L87 Difference]: Start difference. First operand 966 states and 3656 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:06:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:30,113 INFO L93 Difference]: Finished difference Result 1961 states and 7495 transitions. [2022-11-22 02:06:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:06:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 02:06:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:30,122 INFO L225 Difference]: With dead ends: 1961 [2022-11-22 02:06:30,123 INFO L226 Difference]: Without dead ends: 1961 [2022-11-22 02:06:30,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:06:30,124 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 243 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:30,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 55 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:06:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-11-22 02:06:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1421. [2022-11-22 02:06:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1412 states have (on average 3.9242209631728047) internal successors, (5541), 1420 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states 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 02:06:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 5541 transitions. [2022-11-22 02:06:30,172 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 5541 transitions. Word has length 10 [2022-11-22 02:06:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:30,173 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 5541 transitions. [2022-11-22 02:06:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:06:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 5541 transitions. [2022-11-22 02:06:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:06:30,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:30,178 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-22 02:06:30,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (32)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:30,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:30,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:30,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:06:30,790 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:06:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:30,791 INFO L85 PathProgramCache]: Analyzing trace with hash -982823684, now seen corresponding path program 2 times [2022-11-22 02:06:30,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:06:30,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798059919] [2022-11-22 02:06:30,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:06:30,791 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 02:06:30,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:06:30,792 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:06:30,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Waiting until timeout for monitored process [2022-11-22 02:06:30,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:06:30,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:06:30,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:06:30,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:31,103 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:06:31,103 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 02:06:31,529 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 02:06:31,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:33,077 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 02:06:33,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:06:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798059919] [2022-11-22 02:06:33,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798059919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948148098] [2022-11-22 02:06:33,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:06:33,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:06:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:06:33,078 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:06:33,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-22 02:06:33,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:06:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:06:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:06:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:33,516 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:06:33,517 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 02:06:33,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:06:33,907 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 02:06:33,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:34,868 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 02:06:34,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1948148098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:34,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409418316] [2022-11-22 02:06:34,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:06:34,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:34,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:06:34,870 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:06:34,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-22 02:06:35,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:06:35,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:06:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:06:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:35,349 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 02:06:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:06:35,703 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 02:06:35,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409418316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:06:35,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:06:35,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-22 02:06:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180398082] [2022-11-22 02:06:35,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:06:35,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 02:06:35,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:06:35,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 02:06:35,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:06:35,706 INFO L87 Difference]: Start difference. First operand 1421 states and 5541 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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 02:06:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:57,303 INFO L93 Difference]: Finished difference Result 2644 states and 9576 transitions. [2022-11-22 02:06:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 02:06:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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 11 [2022-11-22 02:06:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:57,315 INFO L225 Difference]: With dead ends: 2644 [2022-11-22 02:06:57,316 INFO L226 Difference]: Without dead ends: 2644 [2022-11-22 02:06:57,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=851, Invalid=2689, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:06:57,317 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1051 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:57,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 319 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-11-22 02:06:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2022-11-22 02:06:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1548. [2022-11-22 02:06:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1539 states have (on average 3.8382066276803117) internal successors, (5907), 1547 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states 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 02:06:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5907 transitions. [2022-11-22 02:06:57,390 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5907 transitions. Word has length 11 [2022-11-22 02:06:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:57,390 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 5907 transitions. [2022-11-22 02:06:57,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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 02:06:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5907 transitions. [2022-11-22 02:06:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:06:57,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:57,392 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 02:06:57,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:57,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:57,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:57,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:57,996 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:06:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 417008356, now seen corresponding path program 3 times [2022-11-22 02:06:57,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:06:57,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113506322] [2022-11-22 02:06:57,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:06:57,997 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 02:06:57,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:06:57,998 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:06:58,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Waiting until timeout for monitored process [2022-11-22 02:06:58,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:06:58,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:06:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:06:58,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:58,402 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:06:58,402 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 02:06:58,887 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 02:06:58,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:07:02,090 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 02:07:02,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:07:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113506322] [2022-11-22 02:07:02,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113506322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:07:02,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [638312547] [2022-11-22 02:07:02,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:07:02,091 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:07:02,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:07:02,092 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:07:02,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-22 02:07:02,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:07:02,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:07:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:07:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:03,081 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:07:03,082 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 02:07:03,320 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 02:07:03,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:07:07,224 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 02:07:07,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [638312547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:07:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685592722] [2022-11-22 02:07:07,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:07:07,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:07,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:07,225 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:07,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-22 02:07:10,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:07:10,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:07:10,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:07:10,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:10,290 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:07:10,290 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 02:07:10,463 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 02:07:10,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:07:10,920 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 02:07:10,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685592722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:07:10,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:07:10,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-22 02:07:10,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331314601] [2022-11-22 02:07:10,920 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:07:10,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 02:07:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:07:10,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 02:07:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:07:10,922 INFO L87 Difference]: Start difference. First operand 1548 states and 5907 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:36,017 INFO L93 Difference]: Finished difference Result 11408 states and 44766 transitions. [2022-11-22 02:07:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:07:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:07:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:36,161 INFO L225 Difference]: With dead ends: 11408 [2022-11-22 02:07:36,162 INFO L226 Difference]: Without dead ends: 11408 [2022-11-22 02:07:36,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=610, Invalid=1282, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:07:36,163 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5520 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5520 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:36,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5520 Valid, 366 Invalid, 2819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2790 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-22 02:07:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11408 states. [2022-11-22 02:07:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11408 to 1560. [2022-11-22 02:07:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1551 states have (on average 3.8239845261121856) internal successors, (5931), 1559 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states 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 02:07:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5931 transitions. [2022-11-22 02:07:36,498 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5931 transitions. Word has length 12 [2022-11-22 02:07:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:36,498 INFO L495 AbstractCegarLoop]: Abstraction has 1560 states and 5931 transitions. [2022-11-22 02:07:36,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5931 transitions. [2022-11-22 02:07:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:07:36,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:36,500 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:36,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:36,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-22 02:07:36,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-22 02:07:37,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:37,114 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:07:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash 452755618, now seen corresponding path program 2 times [2022-11-22 02:07:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:07:37,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587093204] [2022-11-22 02:07:37,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:07:37,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:07:37,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:07:37,117 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:07:37,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Waiting until timeout for monitored process [2022-11-22 02:07:37,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:07:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:07:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:07:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:37,442 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:07:37,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-22 02:07:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:37,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:07:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:38,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:07:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587093204] [2022-11-22 02:07:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587093204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:07:38,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064134924] [2022-11-22 02:07:38,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:07:38,686 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:07:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:07:38,687 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:07:38,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-22 02:07:39,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:07:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:07:39,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:07:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:39,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:07:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:40,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064134924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:07:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906139277] [2022-11-22 02:07:40,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:07:40,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:40,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:40,825 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:40,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-22 02:07:41,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:07:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:07:41,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:07:41,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:41,157 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:07:41,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:07:42,046 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 02:07:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:42,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:07:42,260 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 02:07:42,291 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 02:07:42,307 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:07:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:45,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906139277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:07:45,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:07:45,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 48 [2022-11-22 02:07:45,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752134348] [2022-11-22 02:07:45,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:07:45,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 02:07:45,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:07:45,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 02:07:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:07:45,632 INFO L87 Difference]: Start difference. First operand 1560 states and 5931 transitions. Second operand has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 02:08:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:07,946 INFO L93 Difference]: Finished difference Result 2762 states and 9640 transitions. [2022-11-22 02:08:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-22 02:08:07,947 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 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 02:08:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:07,955 INFO L225 Difference]: With dead ends: 2762 [2022-11-22 02:08:07,955 INFO L226 Difference]: Without dead ends: 2762 [2022-11-22 02:08:07,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2022-11-22 02:08:07,957 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1909 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 4533 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 4590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 4533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:07,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1909 Valid, 362 Invalid, 4590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 4533 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2022-11-22 02:08:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-11-22 02:08:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1816. [2022-11-22 02:08:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1807 states have (on average 3.923076923076923) internal successors, (7089), 1815 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states 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 02:08:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 7089 transitions. [2022-11-22 02:08:08,019 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 7089 transitions. Word has length 12 [2022-11-22 02:08:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:08,019 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 7089 transitions. [2022-11-22 02:08:08,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 02:08:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 7089 transitions. [2022-11-22 02:08:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:08:08,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:08,021 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:08:08,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:08:08,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-22 02:08:08,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-22 02:08:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:08:08,634 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:08:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1692653871, now seen corresponding path program 1 times [2022-11-22 02:08:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:08:08,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182414816] [2022-11-22 02:08:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:08,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:08:08,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:08:08,636 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:08:08,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (44)] Waiting until timeout for monitored process [2022-11-22 02:08:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:08,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:08:08,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:08,961 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:08:08,961 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 02:08:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:09,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:11,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:08:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182414816] [2022-11-22 02:08:11,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182414816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:08:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43627962] [2022-11-22 02:08:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:11,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:08:11,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:08:11,599 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:08:11,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-22 02:08:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:11,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:08:11,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:12,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:08:12,006 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 02:08:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:12,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:14,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43627962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:08:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457222008] [2022-11-22 02:08:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:14,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:08:14,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:08:14,633 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:08:14,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-22 02:08:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:08:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:14,948 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:08:14,948 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 02:08:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:15,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:15,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457222008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:08:15,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:08:15,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 20 [2022-11-22 02:08:15,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884499466] [2022-11-22 02:08:15,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:08:15,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:08:15,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:08:15,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:08:15,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:08:15,920 INFO L87 Difference]: Start difference. First operand 1816 states and 7089 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 02:08:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:44,491 INFO L93 Difference]: Finished difference Result 3146 states and 12606 transitions. [2022-11-22 02:08:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:08:44,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:08:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:44,502 INFO L225 Difference]: With dead ends: 3146 [2022-11-22 02:08:44,502 INFO L226 Difference]: Without dead ends: 3146 [2022-11-22 02:08:44,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:08:44,503 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 603 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:44,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 113 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-22 02:08:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-22 02:08:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2412. [2022-11-22 02:08:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2403 states have (on average 4.1610486891385765) internal successors, (9999), 2411 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states 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 02:08:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 9999 transitions. [2022-11-22 02:08:44,583 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 9999 transitions. Word has length 12 [2022-11-22 02:08:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:44,584 INFO L495 AbstractCegarLoop]: Abstraction has 2412 states and 9999 transitions. [2022-11-22 02:08:44,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 02:08:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 9999 transitions. [2022-11-22 02:08:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:08:44,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:44,586 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:08:44,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-22 02:08:44,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-22 02:08:44,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (44)] Ended with exit code 0 [2022-11-22 02:08:45,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:08:45,190 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:08:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1307313388, now seen corresponding path program 2 times [2022-11-22 02:08:45,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:08:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499779517] [2022-11-22 02:08:45,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:08:45,191 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 02:08:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:08:45,193 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:08:45,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (47)] Waiting until timeout for monitored process [2022-11-22 02:08:45,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:08:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:08:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:08:45,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:45,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:46,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:08:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499779517] [2022-11-22 02:08:46,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499779517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:08:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [456976866] [2022-11-22 02:08:46,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:08:46,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:08:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:08:46,236 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:08:46,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-22 02:08:46,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:08:46,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:08:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:08:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:46,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:46,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [456976866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:08:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989986737] [2022-11-22 02:08:46,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:08:46,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:08:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:08:46,879 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:08:46,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-22 02:08:47,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:08:47,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:08:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:08:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:47,299 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:08:47,299 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 02:08:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:47,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:47,924 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 02:08:47,949 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 02:08:47,954 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:08:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:49,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989986737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:08:49,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:08:49,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 23 [2022-11-22 02:08:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748544229] [2022-11-22 02:08:49,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:08:49,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:08:49,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:08:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:08:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:08:49,105 INFO L87 Difference]: Start difference. First operand 2412 states and 9999 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 02:08:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:58,423 INFO L93 Difference]: Finished difference Result 2516 states and 10168 transitions. [2022-11-22 02:08:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:08:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 02:08:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:58,430 INFO L225 Difference]: With dead ends: 2516 [2022-11-22 02:08:58,430 INFO L226 Difference]: Without dead ends: 2516 [2022-11-22 02:08:58,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:08:58,431 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 396 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 134 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-22 02:08:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-11-22 02:08:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2410. [2022-11-22 02:08:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2401 states have (on average 4.14618908788005) internal successors, (9955), 2409 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states 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 02:08:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 9955 transitions. [2022-11-22 02:08:58,493 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 9955 transitions. Word has length 12 [2022-11-22 02:08:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:58,494 INFO L495 AbstractCegarLoop]: Abstraction has 2410 states and 9955 transitions. [2022-11-22 02:08:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 02:08:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 9955 transitions. [2022-11-22 02:08:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:08:58,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:58,496 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:08:58,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-22 02:08:58,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-22 02:08:58,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (47)] Ended with exit code 0 [2022-11-22 02:08:59,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:08:59,103 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:08:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash 83511308, now seen corresponding path program 2 times [2022-11-22 02:08:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:08:59,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746473885] [2022-11-22 02:08:59,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:08:59,104 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 02:08:59,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:08:59,105 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:08:59,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (50)] Waiting until timeout for monitored process [2022-11-22 02:08:59,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 02:08:59,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:08:59,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:08:59,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:59,425 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:08:59,425 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 02:08:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:08:59,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:08:59,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:08:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746473885] [2022-11-22 02:08:59,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746473885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:59,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:59,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:08:59,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990414720] [2022-11-22 02:08:59,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:59,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:08:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:08:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:08:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:08:59,742 INFO L87 Difference]: Start difference. First operand 2410 states and 9955 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:09:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:00,187 INFO L93 Difference]: Finished difference Result 2538 states and 10103 transitions. [2022-11-22 02:09:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 02:09:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:00,194 INFO L225 Difference]: With dead ends: 2538 [2022-11-22 02:09:00,194 INFO L226 Difference]: Without dead ends: 2538 [2022-11-22 02:09:00,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:09:00,195 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:00,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:09:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2022-11-22 02:09:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2476. [2022-11-22 02:09:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2467 states have (on average 4.0279691933522495) internal successors, (9937), 2475 states have internal predecessors, (9937), 0 states have call successors, (0), 0 states 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 02:09:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 9937 transitions. [2022-11-22 02:09:00,260 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 9937 transitions. Word has length 13 [2022-11-22 02:09:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:00,261 INFO L495 AbstractCegarLoop]: Abstraction has 2476 states and 9937 transitions. [2022-11-22 02:09:00,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:09:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 9937 transitions. [2022-11-22 02:09:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:09:00,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:00,263 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-22 02:09:00,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (50)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:00,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:09:00,474 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:09:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -777406975, now seen corresponding path program 3 times [2022-11-22 02:09:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:09:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279634728] [2022-11-22 02:09:00,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:09:00,475 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 02:09:00,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:09:00,476 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:09:00,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:09:00,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:09:00,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:09:00,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:09:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:00,983 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:09:00,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:09:01,563 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 02:09:01,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:01,583 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 02:09:01,610 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 02:09:01,614 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:09:03,243 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 02:09:03,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:09:03,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279634728] [2022-11-22 02:09:03,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279634728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:03,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1610499213] [2022-11-22 02:09:03,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:09:03,243 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:09:03,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:09:03,244 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:09:03,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-22 02:09:04,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:09:04,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:09:04,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:09:04,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:04,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:09:04,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:09:04,686 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 02:09:04,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:04,702 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 02:09:04,727 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 02:09:04,733 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:09:04,911 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 02:09:04,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1610499213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:04,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918447306] [2022-11-22 02:09:04,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:09:04,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:04,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:04,913 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:04,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-22 02:09:05,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:09:05,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:09:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:09:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:06,242 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 02:09:06,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:07,590 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 02:09:07,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918447306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:07,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:09:07,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 39 [2022-11-22 02:09:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132464791] [2022-11-22 02:09:07,591 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:09:07,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-22 02:09:07,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:09:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-22 02:09:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 02:09:07,592 INFO L87 Difference]: Start difference. First operand 2476 states and 9937 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 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 02:09:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:45,195 INFO L93 Difference]: Finished difference Result 3859 states and 14489 transitions. [2022-11-22 02:09:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 02:09:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 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 13 [2022-11-22 02:09:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:45,207 INFO L225 Difference]: With dead ends: 3859 [2022-11-22 02:09:45,207 INFO L226 Difference]: Without dead ends: 3859 [2022-11-22 02:09:45,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=786, Invalid=4326, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:09:45,208 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1501 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:45,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 684 Invalid, 4352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4302 Invalid, 0 Unknown, 0 Unchecked, 25.9s Time] [2022-11-22 02:09:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2022-11-22 02:09:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 2941. [2022-11-22 02:09:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2932 states have (on average 3.9996589358799453) internal successors, (11727), 2940 states have internal predecessors, (11727), 0 states have call successors, (0), 0 states 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 02:09:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 11727 transitions. [2022-11-22 02:09:45,280 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 11727 transitions. Word has length 13 [2022-11-22 02:09:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:45,280 INFO L495 AbstractCegarLoop]: Abstraction has 2941 states and 11727 transitions. [2022-11-22 02:09:45,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 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 02:09:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 11727 transitions. [2022-11-22 02:09:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:09:45,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:45,283 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:45,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:45,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:45,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:09:45,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:09:45,890 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:09:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:45,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1873595010, now seen corresponding path program 3 times [2022-11-22 02:09:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:09:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727511301] [2022-11-22 02:09:45,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:09:45,891 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 02:09:45,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:09:45,892 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:09:45,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:09:46,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:09:46,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:09:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:09:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:46,382 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:09:46,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-22 02:09:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:46,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:48,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:09:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727511301] [2022-11-22 02:09:48,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727511301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1881118213] [2022-11-22 02:09:48,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:09:48,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:09:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:09:48,495 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:09:48,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-22 02:09:48,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:09:48,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:09:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:09:48,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:50,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1881118213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367502910] [2022-11-22 02:09:52,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:09:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:52,243 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-22 02:09:52,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:09:52,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:09:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:09:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:52,679 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:09:52,679 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 02:09:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:54,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:56,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367502910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:56,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:09:56,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 10, 10] total 56 [2022-11-22 02:09:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067355865] [2022-11-22 02:09:56,799 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:09:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-22 02:09:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:09:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-22 02:09:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 02:09:56,802 INFO L87 Difference]: Start difference. First operand 2941 states and 11727 transitions. Second operand has 58 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:10:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:32,386 INFO L93 Difference]: Finished difference Result 4911 states and 17192 transitions. [2022-11-22 02:10:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-22 02:10:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 02:10:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:32,399 INFO L225 Difference]: With dead ends: 4911 [2022-11-22 02:10:32,399 INFO L226 Difference]: Without dead ends: 4911 [2022-11-22 02:10:32,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1289, Invalid=8023, Unknown=0, NotChecked=0, Total=9312 [2022-11-22 02:10:32,402 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3307 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 8263 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3307 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 8352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 8263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:32,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3307 Valid, 665 Invalid, 8352 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [89 Valid, 8263 Invalid, 0 Unknown, 0 Unchecked, 23.9s Time] [2022-11-22 02:10:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2022-11-22 02:10:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 3071. [2022-11-22 02:10:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 3062 states have (on average 4.009470934030046) internal successors, (12277), 3070 states have internal predecessors, (12277), 0 states have call successors, (0), 0 states 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 02:10:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 12277 transitions. [2022-11-22 02:10:32,506 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 12277 transitions. Word has length 14 [2022-11-22 02:10:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:32,506 INFO L495 AbstractCegarLoop]: Abstraction has 3071 states and 12277 transitions. [2022-11-22 02:10:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:10:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 12277 transitions. [2022-11-22 02:10:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:10:32,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:32,509 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:10:32,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:32,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:10:32,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-22 02:10:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:10:33,119 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:10:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2091453204, now seen corresponding path program 3 times [2022-11-22 02:10:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:10:33,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930546312] [2022-11-22 02:10:33,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:10:33,120 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 02:10:33,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:10:33,121 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:10:33,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:10:33,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:10:33,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:10:33,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:33,514 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:10:33,514 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 02:10:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:10:33,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:10:35,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:10:35,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930546312] [2022-11-22 02:10:35,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930546312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:35,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422777904] [2022-11-22 02:10:35,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:10:35,935 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:10:35,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:10:35,937 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:10:35,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-22 02:10:36,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:10:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:36,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:10:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:36,584 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:10:36,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:10:36,895 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 02:10:36,908 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 02:10:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:10:37,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:37,141 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 02:10:37,194 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 02:10:37,203 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:10:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:10:40,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [422777904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:40,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772103767] [2022-11-22 02:10:40,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:10:40,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:40,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:40,361 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:40,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-22 02:10:40,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:10:40,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:10:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:40,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:10:40,837 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 02:10:41,157 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 02:10:41,169 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 02:10:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:10:41,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:41,289 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 02:10:41,346 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 02:10:41,351 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:10:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:10:44,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772103767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:44,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:10:44,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 17 [2022-11-22 02:10:44,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274125617] [2022-11-22 02:10:44,264 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:10:44,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 02:10:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:10:44,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 02:10:44,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:10:44,266 INFO L87 Difference]: Start difference. First operand 3071 states and 12277 transitions. Second operand has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 02:10:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:46,352 INFO L93 Difference]: Finished difference Result 3255 states and 12801 transitions. [2022-11-22 02:10:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:10:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:10:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:46,361 INFO L225 Difference]: With dead ends: 3255 [2022-11-22 02:10:46,361 INFO L226 Difference]: Without dead ends: 3255 [2022-11-22 02:10:46,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:10:46,362 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 167 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:46,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 28 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 02:10:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-11-22 02:10:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2103. [2022-11-22 02:10:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2098 states have (on average 3.7945662535748332) internal successors, (7961), 2102 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states 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 02:10:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 7961 transitions. [2022-11-22 02:10:46,404 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 7961 transitions. Word has length 14 [2022-11-22 02:10:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:46,404 INFO L495 AbstractCegarLoop]: Abstraction has 2103 states and 7961 transitions. [2022-11-22 02:10:46,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 02:10:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 7961 transitions. [2022-11-22 02:10:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:10:46,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:46,407 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2022-11-22 02:10:46,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:46,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-22 02:10:46,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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)] Ended with exit code 0 [2022-11-22 02:10:47,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:10:47,012 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:10:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash 919956732, now seen corresponding path program 4 times [2022-11-22 02:10:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:10:47,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562178373] [2022-11-22 02:10:47,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:10:47,013 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 02:10:47,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:10:47,014 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:10:47,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (60)] Waiting until timeout for monitored process [2022-11-22 02:10:47,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:10:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:10:47,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:47,805 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 02:10:47,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:49,496 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 02:10:50,754 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 02:10:50,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:10:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562178373] [2022-11-22 02:10:50,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562178373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017583000] [2022-11-22 02:10:50,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:10:50,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:10:50,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:10:50,757 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:10:50,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-22 02:10:51,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:10:51,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:10:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:51,341 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:10:51,342 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 02:10:53,324 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 02:10:53,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:56,602 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 02:10:56,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017583000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:56,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605957513] [2022-11-22 02:10:56,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:10:56,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:56,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:56,604 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:56,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-22 02:10:56,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:10:56,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:56,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:10:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:57,008 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:10:57,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:11:01,339 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 02:11:01,349 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 02:11:01,607 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 02:11:01,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:11:01,675 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 02:11:01,727 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 02:11:01,733 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:11:08,342 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 02:11:08,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605957513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:11:08,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:11:08,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 12, 12] total 69 [2022-11-22 02:11:08,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210982950] [2022-11-22 02:11:08,343 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:11:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-22 02:11:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:11:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-22 02:11:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=4451, Unknown=1, NotChecked=0, Total=4970 [2022-11-22 02:11:08,347 INFO L87 Difference]: Start difference. First operand 2103 states and 7961 transitions. Second operand has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 02:13:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:29,489 INFO L93 Difference]: Finished difference Result 13786 states and 50536 transitions. [2022-11-22 02:13:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-22 02:13:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 02:13:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:29,563 INFO L225 Difference]: With dead ends: 13786 [2022-11-22 02:13:29,563 INFO L226 Difference]: Without dead ends: 13786 [2022-11-22 02:13:29,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6782 ImplicationChecksByTransitivity, 119.0s TimeCoverageRelationStatistics Valid=3697, Invalid=19558, Unknown=1, NotChecked=0, Total=23256 [2022-11-22 02:13:29,567 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 8926 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 9865 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8926 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 9985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 9865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:29,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8926 Valid, 1479 Invalid, 9985 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [120 Valid, 9865 Invalid, 0 Unknown, 0 Unchecked, 39.2s Time] [2022-11-22 02:13:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13786 states. [2022-11-22 02:13:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13786 to 2842. [2022-11-22 02:13:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2837 states have (on average 4.040183292210081) internal successors, (11462), 2841 states have internal predecessors, (11462), 0 states have call successors, (0), 0 states 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 02:13:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11462 transitions. [2022-11-22 02:13:29,838 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11462 transitions. Word has length 15 [2022-11-22 02:13:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:29,838 INFO L495 AbstractCegarLoop]: Abstraction has 2842 states and 11462 transitions. [2022-11-22 02:13:29,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 02:13:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11462 transitions. [2022-11-22 02:13:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:13:29,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:29,844 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-11-22 02:13:29,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (60)] Ended with exit code 0 [2022-11-22 02:13:30,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:30,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-22 02:13:30,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:13:30,458 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:13:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1235011073, now seen corresponding path program 5 times [2022-11-22 02:13:30,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:13:30,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535009224] [2022-11-22 02:13:30,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:13:30,460 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 02:13:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:13:30,461 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:13:30,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (63)] Waiting until timeout for monitored process [2022-11-22 02:13:30,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:13:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:13:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:13:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:31,008 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:13:31,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:13:32,034 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 02:13:32,046 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 02:13:32,279 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 02:13:32,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:32,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-22 02:13:32,870 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 02:13:32,878 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:13:38,097 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 02:13:38,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:13:38,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535009224] [2022-11-22 02:13:38,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535009224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:13:38,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289316974] [2022-11-22 02:13:38,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:13:38,098 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:13:38,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:13:38,099 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:13:38,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-22 02:13:38,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:13:38,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:13:38,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:13:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:41,017 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 02:13:41,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:44,555 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 02:13:44,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289316974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:13:44,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581958195] [2022-11-22 02:13:44,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:13:44,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:44,557 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:44,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-22 02:13:45,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:13:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:13:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:13:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:48,099 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 02:13:48,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:49,895 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 02:13:49,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581958195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:13:49,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:13:49,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-11-22 02:13:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146258185] [2022-11-22 02:13:49,897 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:13:49,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-22 02:13:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:13:49,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-22 02:13:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=4359, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:13:49,898 INFO L87 Difference]: Start difference. First operand 2842 states and 11462 transitions. Second operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 02:14:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:58,085 INFO L93 Difference]: Finished difference Result 4524 states and 17220 transitions. [2022-11-22 02:14:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-22 02:14:58,087 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 02:14:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:58,098 INFO L225 Difference]: With dead ends: 4524 [2022-11-22 02:14:58,098 INFO L226 Difference]: Without dead ends: 4524 [2022-11-22 02:14:58,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=2262, Invalid=12018, Unknown=0, NotChecked=0, Total=14280 [2022-11-22 02:14:58,099 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 3822 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 8698 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3822 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 8847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 8698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:58,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3822 Valid, 1548 Invalid, 8847 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [149 Valid, 8698 Invalid, 0 Unknown, 0 Unchecked, 33.1s Time] [2022-11-22 02:14:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2022-11-22 02:14:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 2917. [2022-11-22 02:14:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2912 states have (on average 3.865041208791209) internal successors, (11255), 2916 states have internal predecessors, (11255), 0 states have call successors, (0), 0 states 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 02:14:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 11255 transitions. [2022-11-22 02:14:58,175 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 11255 transitions. Word has length 15 [2022-11-22 02:14:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:58,175 INFO L495 AbstractCegarLoop]: Abstraction has 2917 states and 11255 transitions. [2022-11-22 02:14:58,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 02:14:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 11255 transitions. [2022-11-22 02:14:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 02:14:58,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:58,178 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:58,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:58,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (63)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:58,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-22 02:14:58,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:14:58,789 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:14:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash -733021150, now seen corresponding path program 4 times [2022-11-22 02:14:58,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:14:58,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567047536] [2022-11-22 02:14:58,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:14:58,790 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 02:14:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:14:58,790 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:14:58,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (66)] Waiting until timeout for monitored process [2022-11-22 02:14:59,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:14:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:14:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:14:59,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:59,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:00,924 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 02:15:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:02,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:15:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567047536] [2022-11-22 02:15:02,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567047536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1025809963] [2022-11-22 02:15:02,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:15:02,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:15:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:15:02,121 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:15:02,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-22 02:15:02,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:15:02,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:15:02,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:15:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:04,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:07,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1025809963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425689007] [2022-11-22 02:15:07,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:15:07,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:07,968 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:07,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-22 02:15:08,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:15:08,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:15:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:15:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:08,401 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:15:08,402 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 02:15:10,842 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 02:15:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:11,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:11,163 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 02:15:11,183 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 02:15:11,194 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:15:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:19,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425689007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:19,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:15:19,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 71 [2022-11-22 02:15:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257245891] [2022-11-22 02:15:19,759 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:19,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-22 02:15:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:15:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-22 02:15:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=4870, Unknown=0, NotChecked=0, Total=5256 [2022-11-22 02:15:19,760 INFO L87 Difference]: Start difference. First operand 2917 states and 11255 transitions. Second operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 02:18:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:11,471 INFO L93 Difference]: Finished difference Result 15109 states and 54156 transitions. [2022-11-22 02:18:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-22 02:18:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 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 02:18:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:11,510 INFO L225 Difference]: With dead ends: 15109 [2022-11-22 02:18:11,510 INFO L226 Difference]: Without dead ends: 15109 [2022-11-22 02:18:11,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9253 ImplicationChecksByTransitivity, 123.5s TimeCoverageRelationStatistics Valid=4301, Invalid=29005, Unknown=0, NotChecked=0, Total=33306 [2022-11-22 02:18:11,513 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 13246 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 13612 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13246 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 13955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 13612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:11,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13246 Valid, 1153 Invalid, 13955 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [343 Valid, 13612 Invalid, 0 Unknown, 0 Unchecked, 65.0s Time] [2022-11-22 02:18:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15109 states. [2022-11-22 02:18:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15109 to 2853. [2022-11-22 02:18:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2848 states have (on average 3.876053370786517) internal successors, (11039), 2852 states have internal predecessors, (11039), 0 states have call successors, (0), 0 states 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 02:18:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 11039 transitions. [2022-11-22 02:18:11,734 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 11039 transitions. Word has length 16 [2022-11-22 02:18:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:11,734 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 11039 transitions. [2022-11-22 02:18:11,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 02:18:11,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 11039 transitions. [2022-11-22 02:18:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:18:11,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:11,751 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:11,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (66)] Ended with exit code 0 [2022-11-22 02:18:11,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-22 02:18:12,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-22 02:18:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:12,359 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:18:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1859119614, now seen corresponding path program 5 times [2022-11-22 02:18:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604841391] [2022-11-22 02:18:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:18:12,360 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 02:18:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:12,362 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 02:18:12,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/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 (69)] Waiting until timeout for monitored process [2022-11-22 02:18:12,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:18:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:18:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:18:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:13,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:15,060 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 02:18:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:16,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:16,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604841391] [2022-11-22 02:18:16,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604841391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:16,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1318756363] [2022-11-22 02:18:16,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:18:16,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:18:16,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:18:16,372 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:18:16,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-22 02:18:17,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:18:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:18:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:18:17,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:19,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:24,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1318756363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32440037] [2022-11-22 02:18:24,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:18:24,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:24,153 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:24,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100daa16-9549-4778-9950-32d472a31cab/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-22 02:18:26,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:18:26,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:18:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 02:18:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:26,865 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:18:26,865 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 02:18:29,620 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 02:18:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:30,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:30,210 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 02:18:30,236 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 02:18:30,247 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:18:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:39,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32440037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:39,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:18:39,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 82 [2022-11-22 02:18:39,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517232081] [2022-11-22 02:18:39,594 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:18:39,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-22 02:18:39,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:39,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-22 02:18:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=6505, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 02:18:39,595 INFO L87 Difference]: Start difference. First operand 2853 states and 11039 transitions. Second operand has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)