./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-8393723 [2022-11-19 07:10:53,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:10:53,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:10:53,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:10:53,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:10:53,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:10:53,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:10:53,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:10:53,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:10:53,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:10:53,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:10:53,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:10:53,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:10:53,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:10:53,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:10:53,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:10:53,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:10:53,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:10:53,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:10:53,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:10:53,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:10:53,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:10:53,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:10:53,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:10:53,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:10:53,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:10:53,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:10:53,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:10:53,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:10:53,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:10:53,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:10:53,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:10:53,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:10:53,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:10:53,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:10:53,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:10:53,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:10:53,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:10:53,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:10:53,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:10:53,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:10:53,077 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:10:53,124 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:10:53,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:10:53,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:10:53,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:10:53,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:10:53,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:10:53,126 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:10:53,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:10:53,126 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:10:53,126 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:10:53,126 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:10:53,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:10:53,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:10:53,127 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:10:53,127 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:10:53,127 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:10:53,127 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:10:53,127 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:10:53,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:10:53,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:10:53,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:10:53,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:10:53,129 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:10:53,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:10:53,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:10:53,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:10:53,129 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:10:53,130 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:10:53,130 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:10:53,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:10:53,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:10:53,135 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:10:53,135 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:10:53,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:10:53,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:10:53,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:53,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:10:53,137 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:10:53,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:10:53,137 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:10:53,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:10:53,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:10:53,138 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_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-19 07:10:53,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:10:53,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:10:53,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:10:53,435 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:10:53,435 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:10:53,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-19 07:10:53,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/dc30622e4/09ad8cf5783e44fda6030fa07976b339/FLAG61de9572a [2022-11-19 07:10:53,987 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:10:53,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-19 07:10:54,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/dc30622e4/09ad8cf5783e44fda6030fa07976b339/FLAG61de9572a [2022-11-19 07:10:54,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/dc30622e4/09ad8cf5783e44fda6030fa07976b339 [2022-11-19 07:10:54,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:10:54,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:10:54,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:54,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:10:54,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:10:54,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:54" (1/1) ... [2022-11-19 07:10:54,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d1c8013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:54, skipping insertion in model container [2022-11-19 07:10:54,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:54" (1/1) ... [2022-11-19 07:10:54,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:10:54,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:10:54,610 WARN L234 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_dd180d27-b1e3-4295-b8c1-b01922e85985/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-19 07:10:54,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:54,628 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) [2022-11-19 07:10:54,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6cca80dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:54, skipping insertion in model container [2022-11-19 07:10:54,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:54,630 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:10:54,631 INFO L158 Benchmark]: Toolchain (without parser) took 272.90ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 89.9MB in the end (delta: -10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:10:54,632 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 77.6MB. Free memory is still 32.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:10:54,633 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.19ms. Allocated memory is still 113.2MB. Free memory was 79.3MB in the beginning and 89.9MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:10:54,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 77.6MB. Free memory is still 32.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.19ms. Allocated memory is still 113.2MB. Free memory was 79.3MB in the beginning and 89.9MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-8393723 [2022-11-19 07:10:56,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:10:56,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:10:56,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:10:56,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:10:56,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:10:56,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:10:56,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:10:56,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:10:56,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:10:56,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:10:56,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:10:56,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:10:56,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:10:56,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:10:56,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:10:56,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:10:56,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:10:56,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:10:56,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:10:56,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:10:56,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:10:56,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:10:56,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:10:56,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:10:56,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:10:56,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:10:56,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:10:56,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:10:56,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:10:56,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:10:56,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:10:56,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:10:56,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:10:56,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:10:56,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:10:56,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:10:56,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:10:56,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:10:56,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:10:56,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:10:56,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:10:56,812 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:10:56,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:10:56,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:10:56,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:10:56,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:10:56,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:10:56,815 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:10:56,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:10:56,816 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:10:56,816 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:10:56,817 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:10:56,818 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:10:56,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:10:56,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:10:56,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:10:56,820 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:10:56,820 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:10:56,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:10:56,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:10:56,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:10:56,821 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:10:56,821 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:10:56,821 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:10:56,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:10:56,822 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:10:56,822 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:10:56,822 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:10:56,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:10:56,823 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:10:56,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:10:56,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:10:56,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:10:56,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:56,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:10:56,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:10:56,825 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:10:56,825 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:56,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:10:56,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:10:56,826 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_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-19 07:10:57,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:10:57,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:10:57,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:10:57,248 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:10:57,250 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:10:57,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-19 07:10:57,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/74d9331a7/49313f4c8608459d995254b29930f943/FLAG04c594fa1 [2022-11-19 07:10:57,828 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:10:57,829 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-19 07:10:57,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/74d9331a7/49313f4c8608459d995254b29930f943/FLAG04c594fa1 [2022-11-19 07:10:58,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/data/74d9331a7/49313f4c8608459d995254b29930f943 [2022-11-19 07:10:58,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:10:58,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:10:58,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:58,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:10:58,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:10:58,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25400484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58, skipping insertion in model container [2022-11-19 07:10:58,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:10:58,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:10:58,390 WARN L234 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_dd180d27-b1e3-4295-b8c1-b01922e85985/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-19 07:10:58,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:58,455 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:10:58,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:10:58,483 WARN L234 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_dd180d27-b1e3-4295-b8c1-b01922e85985/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-19 07:10:58,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:58,491 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:10:58,511 WARN L234 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_dd180d27-b1e3-4295-b8c1-b01922e85985/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-19 07:10:58,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:58,529 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:10:58,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58 WrapperNode [2022-11-19 07:10:58,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:58,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:58,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:10:58,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:10:58,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,570 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 148 [2022-11-19 07:10:58,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:58,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:10:58,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:10:58,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:10:58,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:10:58,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:10:58,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:10:58,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:10:58,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:58,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:10:58,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:10:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:10:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:10:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:10:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:10:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:10:58,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:10:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:10:58,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:10:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 07:10:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 07:10:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:10:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:10:58,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:10:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:10:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:10:58,689 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:10:58,836 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:10:58,838 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:10:59,344 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:10:59,455 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:10:59,455 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:10:59,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:10:59 BoogieIcfgContainer [2022-11-19 07:10:59,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:10:59,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:10:59,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:10:59,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:10:59,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:10:58" (1/3) ... [2022-11-19 07:10:59,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a606e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:10:59, skipping insertion in model container [2022-11-19 07:10:59,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (2/3) ... [2022-11-19 07:10:59,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a606e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:10:59, skipping insertion in model container [2022-11-19 07:10:59,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:10:59" (3/3) ... [2022-11-19 07:10:59,466 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-11-19 07:10:59,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:10:59,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-19 07:10:59,485 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:10:59,612 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-19 07:10:59,663 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:10:59,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 159 transitions, 334 flow [2022-11-19 07:10:59,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 159 transitions, 334 flow [2022-11-19 07:10:59,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 159 transitions, 334 flow [2022-11-19 07:10:59,763 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2022-11-19 07:10:59,763 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-19 07:10:59,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 211 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2022-11-19 07:10:59,772 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2022-11-19 07:11:16,379 INFO L134 LiptonReduction]: Checked pairs total: 2294 [2022-11-19 07:11:16,379 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-11-19 07:11:16,387 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 38 transitions, 92 flow [2022-11-19 07:11:16,421 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 230 states, 164 states have (on average 3.518292682926829) internal successors, (577), 229 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:16,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:11:16,445 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;@73346595, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:11:16,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-11-19 07:11:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 230 states, 164 states have (on average 3.518292682926829) internal successors, (577), 229 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:11:16,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:16,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:11:16,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash 21685, now seen corresponding path program 1 times [2022-11-19 07:11:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316931303] [2022-11-19 07:11:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:16,474 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 [2022-11-19 07:11:16,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:16,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:16,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:11:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:16,832 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:16,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:16,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:16,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316931303] [2022-11-19 07:11:16,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316931303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:16,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:16,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:11:16,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451963142] [2022-11-19 07:11:16,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:16,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:16,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:16,918 INFO L87 Difference]: Start difference. First operand has 230 states, 164 states have (on average 3.518292682926829) internal successors, (577), 229 states have internal predecessors, (577), 0 states have call successors, (0), 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) [2022-11-19 07:11:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:17,248 INFO L93 Difference]: Finished difference Result 456 states and 1150 transitions. [2022-11-19 07:11:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:17,251 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 [2022-11-19 07:11:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:17,266 INFO L225 Difference]: With dead ends: 456 [2022-11-19 07:11:17,266 INFO L226 Difference]: Without dead ends: 456 [2022-11-19 07:11:17,267 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 [2022-11-19 07:11:17,271 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:17,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 4 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:11:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-19 07:11:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 230. [2022-11-19 07:11:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 165 states have (on average 3.521212121212121) internal successors, (581), 229 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 581 transitions. [2022-11-19 07:11:17,329 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 581 transitions. Word has length 2 [2022-11-19 07:11:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:17,330 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 581 transitions. [2022-11-19 07:11:17,330 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) [2022-11-19 07:11:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 581 transitions. [2022-11-19 07:11:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:11:17,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:17,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:11:17,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:17,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:17,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash 21813, now seen corresponding path program 1 times [2022-11-19 07:11:17,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:17,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795167785] [2022-11-19 07:11:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:17,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:17,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:17,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:11:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:17,720 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-19 07:11:17,721 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-19 07:11:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:17,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:17,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:17,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795167785] [2022-11-19 07:11:17,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795167785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:17,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:17,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:11:17,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273650360] [2022-11-19 07:11:17,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:17,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:17,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:17,750 INFO L87 Difference]: Start difference. First operand 230 states and 581 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) [2022-11-19 07:11:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:17,889 INFO L93 Difference]: Finished difference Result 187 states and 453 transitions. [2022-11-19 07:11:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:17,889 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 [2022-11-19 07:11:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:17,891 INFO L225 Difference]: With dead ends: 187 [2022-11-19 07:11:17,891 INFO L226 Difference]: Without dead ends: 187 [2022-11-19 07:11:17,891 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 [2022-11-19 07:11:17,893 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:17,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-19 07:11:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-11-19 07:11:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 138 states have (on average 3.282608695652174) internal successors, (453), 186 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 453 transitions. [2022-11-19 07:11:17,909 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 453 transitions. Word has length 2 [2022-11-19 07:11:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:17,909 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 453 transitions. [2022-11-19 07:11:17,912 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) [2022-11-19 07:11:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 453 transitions. [2022-11-19 07:11:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:11:17,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:17,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:11:17,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:18,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash 21684, now seen corresponding path program 1 times [2022-11-19 07:11:18,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:18,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231574032] [2022-11-19 07:11:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:18,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:18,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:18,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:11:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:18,243 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:11:18,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:11:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:18,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:18,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231574032] [2022-11-19 07:11:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231574032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:18,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:18,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:11:18,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372450848] [2022-11-19 07:11:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:18,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:18,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:18,262 INFO L87 Difference]: Start difference. First operand 187 states and 453 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) [2022-11-19 07:11:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:18,413 INFO L93 Difference]: Finished difference Result 186 states and 451 transitions. [2022-11-19 07:11:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:18,415 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 [2022-11-19 07:11:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:18,416 INFO L225 Difference]: With dead ends: 186 [2022-11-19 07:11:18,416 INFO L226 Difference]: Without dead ends: 186 [2022-11-19 07:11:18,417 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 [2022-11-19 07:11:18,418 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:18,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-19 07:11:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-11-19 07:11:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 138 states have (on average 3.2681159420289854) internal successors, (451), 185 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 451 transitions. [2022-11-19 07:11:18,437 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 451 transitions. Word has length 2 [2022-11-19 07:11:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:18,437 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 451 transitions. [2022-11-19 07:11:18,437 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) [2022-11-19 07:11:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 451 transitions. [2022-11-19 07:11:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:11:18,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:18,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:11:18,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:18,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:18,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash 21812, now seen corresponding path program 1 times [2022-11-19 07:11:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411903802] [2022-11-19 07:11:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:18,651 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 [2022-11-19 07:11:18,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:18,653 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:18,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:11:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:18,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:11:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:11:18,795 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:11:18,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 07:11:18,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:11:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:18,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:18,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:18,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411903802] [2022-11-19 07:11:18,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411903802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:18,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:18,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:11:18,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130903802] [2022-11-19 07:11:18,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:18,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:18,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:18,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:18,851 INFO L87 Difference]: Start difference. First operand 186 states and 451 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) [2022-11-19 07:11:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:18,962 INFO L93 Difference]: Finished difference Result 186 states and 450 transitions. [2022-11-19 07:11:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:18,962 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 [2022-11-19 07:11:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:18,964 INFO L225 Difference]: With dead ends: 186 [2022-11-19 07:11:18,964 INFO L226 Difference]: Without dead ends: 186 [2022-11-19 07:11:18,964 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 [2022-11-19 07:11:18,966 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:18,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-19 07:11:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-19 07:11:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-11-19 07:11:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 138 states have (on average 3.260869565217391) internal successors, (450), 185 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 450 transitions. [2022-11-19 07:11:18,975 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 450 transitions. Word has length 2 [2022-11-19 07:11:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:18,976 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 450 transitions. [2022-11-19 07:11:18,976 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) [2022-11-19 07:11:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 450 transitions. [2022-11-19 07:11:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:11:18,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:18,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:11:18,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:19,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:19,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash 676250, now seen corresponding path program 1 times [2022-11-19 07:11:19,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:19,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064253501] [2022-11-19 07:11:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:19,192 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 [2022-11-19 07:11:19,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:19,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:19,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:11:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:11:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:19,375 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:19,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:19,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:19,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064253501] [2022-11-19 07:11:19,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064253501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1318839102] [2022-11-19 07:11:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:19,729 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:19,734 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:19,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 07:11:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:11:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:19,932 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:19,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:19,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:20,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1318839102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:20,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902482265] [2022-11-19 07:11:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:20,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:20,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:20,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:20,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:11:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:11:20,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:20,222 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:20,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:20,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:20,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902482265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:20,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:11:20,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 07:11:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378274571] [2022-11-19 07:11:20,449 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:20,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:11:20,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:11:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:11:20,450 INFO L87 Difference]: Start difference. First operand 186 states and 450 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) [2022-11-19 07:11:21,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:21,798 INFO L93 Difference]: Finished difference Result 734 states and 1788 transitions. [2022-11-19 07:11:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:11:21,800 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 [2022-11-19 07:11:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:21,804 INFO L225 Difference]: With dead ends: 734 [2022-11-19 07:11:21,805 INFO L226 Difference]: Without dead ends: 734 [2022-11-19 07:11:21,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:11:21,806 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 386 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:21,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 10 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:11:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-11-19 07:11:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 189. [2022-11-19 07:11:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 141 states have (on average 3.25531914893617) internal successors, (459), 188 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 459 transitions. [2022-11-19 07:11:21,829 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 459 transitions. Word has length 3 [2022-11-19 07:11:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:21,830 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 459 transitions. [2022-11-19 07:11:21,830 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) [2022-11-19 07:11:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 459 transitions. [2022-11-19 07:11:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:11:21,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:21,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:11:21,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:22,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:22,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:22,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:22,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 676377, now seen corresponding path program 1 times [2022-11-19 07:11:22,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:22,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345841584] [2022-11-19 07:11:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:22,443 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 [2022-11-19 07:11:22,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:22,444 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:22,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:11:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:22,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:11:22,597 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-19 07:11:22,597 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 14 treesize of output 26 [2022-11-19 07:11:22,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:11:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:22,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:22,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:22,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345841584] [2022-11-19 07:11:22,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345841584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:22,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1563348858] [2022-11-19 07:11:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:22,926 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:22,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:22,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 07:11:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:11:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:11:23,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:11:23,142 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:11:23,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 07:11:23,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:11:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:23,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:23,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1563348858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:23,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:11:23,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-19 07:11:23,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975093540] [2022-11-19 07:11:23,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:23,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:23,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:23,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:23,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:11:23,235 INFO L87 Difference]: Start difference. First operand 189 states and 459 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) [2022-11-19 07:11:23,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:23,333 INFO L93 Difference]: Finished difference Result 188 states and 455 transitions. [2022-11-19 07:11:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:23,334 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 [2022-11-19 07:11:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:23,335 INFO L225 Difference]: With dead ends: 188 [2022-11-19 07:11:23,335 INFO L226 Difference]: Without dead ends: 188 [2022-11-19 07:11:23,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:11:23,336 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:23,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-19 07:11:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-19 07:11:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-19 07:11:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 141 states have (on average 3.226950354609929) internal successors, (455), 187 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 455 transitions. [2022-11-19 07:11:23,343 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 455 transitions. Word has length 3 [2022-11-19 07:11:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:23,343 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 455 transitions. [2022-11-19 07:11:23,343 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) [2022-11-19 07:11:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 455 transitions. [2022-11-19 07:11:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:11:23,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:23,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:11:23,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:11:23,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:23,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:23,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash 20978773, now seen corresponding path program 1 times [2022-11-19 07:11:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:23,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429732293] [2022-11-19 07:11:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:23,756 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 [2022-11-19 07:11:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:23,757 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:23,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 07:11:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:23,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:11:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:11:23,894 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-19 07:11:23,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-19 07:11:23,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-19 07:11:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:23,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:23,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429732293] [2022-11-19 07:11:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429732293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:23,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:23,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:11:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193745936] [2022-11-19 07:11:23,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:23,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:23,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:23,951 INFO L87 Difference]: Start difference. First operand 188 states and 455 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:24,074 INFO L93 Difference]: Finished difference Result 175 states and 429 transitions. [2022-11-19 07:11:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-19 07:11:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:24,076 INFO L225 Difference]: With dead ends: 175 [2022-11-19 07:11:24,076 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 07:11:24,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:24,077 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:24,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 07:11:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-19 07:11:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 3.1544117647058822) internal successors, (429), 174 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 429 transitions. [2022-11-19 07:11:24,084 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 429 transitions. Word has length 4 [2022-11-19 07:11:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:24,084 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 429 transitions. [2022-11-19 07:11:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 429 transitions. [2022-11-19 07:11:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:11:24,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:24,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:11:24,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:24,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:24,295 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 20978774, now seen corresponding path program 1 times [2022-11-19 07:11:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932837767] [2022-11-19 07:11:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:24,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:24,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:24,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:11:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:24,429 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2022-11-19 07:11:24,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2022-11-19 07:11:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:24,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:24,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932837767] [2022-11-19 07:11:24,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932837767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:24,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:24,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:11:24,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772848806] [2022-11-19 07:11:24,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:24,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:24,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:24,462 INFO L87 Difference]: Start difference. First operand 175 states and 429 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:24,581 INFO L93 Difference]: Finished difference Result 162 states and 403 transitions. [2022-11-19 07:11:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:24,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-19 07:11:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:24,582 INFO L225 Difference]: With dead ends: 162 [2022-11-19 07:11:24,583 INFO L226 Difference]: Without dead ends: 162 [2022-11-19 07:11:24,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:24,583 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:24,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-19 07:11:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-19 07:11:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 131 states have (on average 3.0763358778625953) internal successors, (403), 161 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2022-11-19 07:11:24,589 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 4 [2022-11-19 07:11:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:24,590 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2022-11-19 07:11:24,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2022-11-19 07:11:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:11:24,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:24,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:11:24,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:24,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash 650337205, now seen corresponding path program 1 times [2022-11-19 07:11:24,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:24,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754475703] [2022-11-19 07:11:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:24,794 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 [2022-11-19 07:11:24,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:24,795 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:24,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:11:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:24,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:24,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754475703] [2022-11-19 07:11:24,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754475703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:24,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:24,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:11:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953802423] [2022-11-19 07:11:24,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:24,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:24,896 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:25,206 INFO L93 Difference]: Finished difference Result 233 states and 562 transitions. [2022-11-19 07:11:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:11:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:11:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:25,208 INFO L225 Difference]: With dead ends: 233 [2022-11-19 07:11:25,208 INFO L226 Difference]: Without dead ends: 233 [2022-11-19 07:11:25,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:11:25,209 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:25,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:11:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-19 07:11:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2022-11-19 07:11:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 152 states have (on average 3.013157894736842) internal successors, (458), 182 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 458 transitions. [2022-11-19 07:11:25,216 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 458 transitions. Word has length 5 [2022-11-19 07:11:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:25,216 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 458 transitions. [2022-11-19 07:11:25,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 458 transitions. [2022-11-19 07:11:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:11:25,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:25,217 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:11:25,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:25,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1324685835, now seen corresponding path program 2 times [2022-11-19 07:11:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:25,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460735365] [2022-11-19 07:11:25,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:11:25,430 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 [2022-11-19 07:11:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:25,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:25,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 07:11:25,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:11:25,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:25,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:11:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:25,602 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:25,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:25,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:26,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460735365] [2022-11-19 07:11:26,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460735365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463661727] [2022-11-19 07:11:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:11:26,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:26,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:26,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-19 07:11:26,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:11:26,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:11:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:26,797 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:26,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:26,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:27,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463661727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:27,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246634362] [2022-11-19 07:11:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:11:27,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:27,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:27,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:27,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:11:28,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:11:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:11:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:28,108 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:28,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:28,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:28,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246634362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:28,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:11:28,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 07:11:28,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873898462] [2022-11-19 07:11:28,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:28,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:11:28,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:11:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:11:28,415 INFO L87 Difference]: Start difference. First operand 183 states and 458 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) [2022-11-19 07:11:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:32,834 INFO L93 Difference]: Finished difference Result 1773 states and 4484 transitions. [2022-11-19 07:11:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:11:32,835 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 [2022-11-19 07:11:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:32,845 INFO L225 Difference]: With dead ends: 1773 [2022-11-19 07:11:32,846 INFO L226 Difference]: Without dead ends: 1773 [2022-11-19 07:11:32,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:11:32,847 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1035 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:32,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 64 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-19 07:11:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-11-19 07:11:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 189. [2022-11-19 07:11:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 158 states have (on average 2.9746835443037973) internal successors, (470), 188 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 470 transitions. [2022-11-19 07:11:32,868 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 470 transitions. Word has length 6 [2022-11-19 07:11:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:32,868 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 470 transitions. [2022-11-19 07:11:32,869 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) [2022-11-19 07:11:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 470 transitions. [2022-11-19 07:11:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:11:32,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:32,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:11:32,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:33,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:33,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:33,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:33,476 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:33,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1314221164, now seen corresponding path program 1 times [2022-11-19 07:11:33,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:33,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656614636] [2022-11-19 07:11:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:33,477 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 [2022-11-19 07:11:33,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:33,478 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:33,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:33,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:11:33,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:33,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:33,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:33,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656614636] [2022-11-19 07:11:33,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656614636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:33,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:33,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:11:33,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389220764] [2022-11-19 07:11:33,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:33,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:33,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:33,617 INFO L87 Difference]: Start difference. First operand 189 states and 470 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) [2022-11-19 07:11:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:33,729 INFO L93 Difference]: Finished difference Result 138 states and 318 transitions. [2022-11-19 07:11:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:33,729 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 [2022-11-19 07:11:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:33,738 INFO L225 Difference]: With dead ends: 138 [2022-11-19 07:11:33,738 INFO L226 Difference]: Without dead ends: 138 [2022-11-19 07:11:33,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:33,740 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:33,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-19 07:11:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-11-19 07:11:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 122 states have (on average 2.6065573770491803) internal successors, (318), 137 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 318 transitions. [2022-11-19 07:11:33,747 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 318 transitions. Word has length 6 [2022-11-19 07:11:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:33,748 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 318 transitions. [2022-11-19 07:11:33,748 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) [2022-11-19 07:11:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 318 transitions. [2022-11-19 07:11:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:11:33,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:33,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:33,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:33,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:33,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2086153431, now seen corresponding path program 1 times [2022-11-19 07:11:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:33,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000271752] [2022-11-19 07:11:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:33,962 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 [2022-11-19 07:11:33,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:33,963 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:33,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 07:11:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:11:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:34,094 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:11:34,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:11:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:34,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:34,116 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:34,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000271752] [2022-11-19 07:11:34,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000271752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:34,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:34,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:11:34,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722521854] [2022-11-19 07:11:34,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:34,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:34,118 INFO L87 Difference]: Start difference. First operand 138 states and 318 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:34,262 INFO L93 Difference]: Finished difference Result 94 states and 210 transitions. [2022-11-19 07:11:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:11:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:11:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:34,263 INFO L225 Difference]: With dead ends: 94 [2022-11-19 07:11:34,263 INFO L226 Difference]: Without dead ends: 94 [2022-11-19 07:11:34,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:11:34,264 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:34,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-19 07:11:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-19 07:11:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 2.413793103448276) internal successors, (210), 93 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 210 transitions. [2022-11-19 07:11:34,268 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 210 transitions. Word has length 7 [2022-11-19 07:11:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:34,268 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 210 transitions. [2022-11-19 07:11:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 210 transitions. [2022-11-19 07:11:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:11:34,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:34,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:34,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:34,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:34,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2086153430, now seen corresponding path program 1 times [2022-11-19 07:11:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:34,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498507642] [2022-11-19 07:11:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:34,479 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 [2022-11-19 07:11:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:34,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:34,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-19 07:11:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:11:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:34,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:34,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:34,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498507642] [2022-11-19 07:11:34,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498507642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:34,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:34,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:11:34,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717291013] [2022-11-19 07:11:34,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:34,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:34,636 INFO L87 Difference]: Start difference. First operand 94 states and 210 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:34,849 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2022-11-19 07:11:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:11:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:11:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:34,851 INFO L225 Difference]: With dead ends: 127 [2022-11-19 07:11:34,851 INFO L226 Difference]: Without dead ends: 127 [2022-11-19 07:11:34,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:11:34,851 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:34,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-19 07:11:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-11-19 07:11:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 2.3181818181818183) internal successors, (255), 116 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 255 transitions. [2022-11-19 07:11:34,856 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 255 transitions. Word has length 7 [2022-11-19 07:11:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:34,857 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 255 transitions. [2022-11-19 07:11:34,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 255 transitions. [2022-11-19 07:11:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:11:34,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:34,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:34,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:11:35,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:35,069 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1388241563, now seen corresponding path program 1 times [2022-11-19 07:11:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:35,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617854466] [2022-11-19 07:11:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:35,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:35,071 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:35,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:11:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:35,277 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:35,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:35,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:36,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617854466] [2022-11-19 07:11:36,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617854466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054261189] [2022-11-19 07:11:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:36,470 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:36,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:36,471 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:36,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-19 07:11:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:11:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:36,713 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:36,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:36,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:37,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054261189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651389893] [2022-11-19 07:11:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:37,298 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:37,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:11:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:37,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:11:37,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:37,483 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:37,484 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:37,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:37,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651389893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:37,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:11:37,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-19 07:11:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997336264] [2022-11-19 07:11:37,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:11:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:11:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:11:37,996 INFO L87 Difference]: Start difference. First operand 117 states and 255 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-11-19 07:11:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:39,862 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2022-11-19 07:11:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:11:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 8 [2022-11-19 07:11:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:39,863 INFO L225 Difference]: With dead ends: 141 [2022-11-19 07:11:39,863 INFO L226 Difference]: Without dead ends: 141 [2022-11-19 07:11:39,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:39,864 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:39,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-11-19 07:11:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-19 07:11:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-19 07:11:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 134 states have (on average 2.485074626865672) internal successors, (333), 140 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 333 transitions. [2022-11-19 07:11:39,869 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 333 transitions. Word has length 8 [2022-11-19 07:11:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:39,869 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 333 transitions. [2022-11-19 07:11:39,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-11-19 07:11:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 333 transitions. [2022-11-19 07:11:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:11:39,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:39,871 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:39,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:40,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:40,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:40,483 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1227810162, now seen corresponding path program 1 times [2022-11-19 07:11:40,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:40,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020532519] [2022-11-19 07:11:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:40,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:40,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:40,485 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:40,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:11:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:11:40,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:40,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:40,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020532519] [2022-11-19 07:11:40,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020532519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:40,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:40,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:11:40,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348733228] [2022-11-19 07:11:40,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:40,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:40,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:40,604 INFO L87 Difference]: Start difference. First operand 141 states and 333 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:40,759 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2022-11-19 07:11:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:11:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:40,760 INFO L225 Difference]: With dead ends: 161 [2022-11-19 07:11:40,761 INFO L226 Difference]: Without dead ends: 161 [2022-11-19 07:11:40,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:40,761 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:40,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-19 07:11:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-11-19 07:11:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 2.5642857142857145) internal successors, (359), 146 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 359 transitions. [2022-11-19 07:11:40,767 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 359 transitions. Word has length 9 [2022-11-19 07:11:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:40,767 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 359 transitions. [2022-11-19 07:11:40,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 359 transitions. [2022-11-19 07:11:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:11:40,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:40,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:40,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:40,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:40,980 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -85816240, now seen corresponding path program 1 times [2022-11-19 07:11:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213677929] [2022-11-19 07:11:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:40,981 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 [2022-11-19 07:11:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:40,982 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:40,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:11:41,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:41,168 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:41,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:41,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:42,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:42,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213677929] [2022-11-19 07:11:42,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213677929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:42,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813006424] [2022-11-19 07:11:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:42,271 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:42,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:42,273 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:42,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-19 07:11:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:11:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:42,549 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:42,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:42,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:43,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [813006424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:43,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997415791] [2022-11-19 07:11:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:43,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:43,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:43,187 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:43,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:11:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:11:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:43,392 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:43,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:43,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:44,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997415791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:44,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:11:44,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-19 07:11:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375785029] [2022-11-19 07:11:44,011 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:11:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:11:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:11:44,012 INFO L87 Difference]: Start difference. First operand 147 states and 359 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-19 07:11:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:46,058 INFO L93 Difference]: Finished difference Result 159 states and 392 transitions. [2022-11-19 07:11:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:11:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 9 [2022-11-19 07:11:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:46,060 INFO L225 Difference]: With dead ends: 159 [2022-11-19 07:11:46,060 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 07:11:46,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:46,061 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:46,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-11-19 07:11:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 07:11:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-11-19 07:11:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 152 states have (on average 2.5789473684210527) internal successors, (392), 158 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2022-11-19 07:11:46,066 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 9 [2022-11-19 07:11:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:46,067 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2022-11-19 07:11:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-19 07:11:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2022-11-19 07:11:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:11:46,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:46,068 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:46,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:11:46,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:46,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:46,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:46,675 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:46,675 INFO L85 PathProgramCache]: Analyzing trace with hash -549404155, now seen corresponding path program 2 times [2022-11-19 07:11:46,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:46,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110048925] [2022-11-19 07:11:46,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:11:46,676 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 [2022-11-19 07:11:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:46,677 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:46,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-19 07:11:46,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:11:46,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:11:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:46,887 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:46,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:11:47,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:47,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:47,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110048925] [2022-11-19 07:11:47,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110048925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:47,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:47,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:11:47,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207089520] [2022-11-19 07:11:47,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:47,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:47,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:47,015 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:47,204 INFO L93 Difference]: Finished difference Result 125 states and 298 transitions. [2022-11-19 07:11:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:11:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:11:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:47,206 INFO L225 Difference]: With dead ends: 125 [2022-11-19 07:11:47,206 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 07:11:47,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:11:47,207 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:47,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 2 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 07:11:47,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 81. [2022-11-19 07:11:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2022-11-19 07:11:47,211 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 10 [2022-11-19 07:11:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:47,211 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2022-11-19 07:11:47,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2022-11-19 07:11:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:11:47,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:47,213 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 07:11:47,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-19 07:11:47,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:47,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:11:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2090062805, now seen corresponding path program 3 times [2022-11-19 07:11:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:47,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793085450] [2022-11-19 07:11:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:11:47,425 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 [2022-11-19 07:11:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:47,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:11:47,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:11:47,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:11:47,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:11:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:47,741 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:47,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:48,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:51,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:51,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793085450] [2022-11-19 07:11:51,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793085450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:51,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [628812119] [2022-11-19 07:11:51,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:11:51,808 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:51,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:51,809 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:51,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 07:11:52,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:11:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:52,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:11:52,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:52,627 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:52,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:52,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:56,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [628812119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:56,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640605657] [2022-11-19 07:11:56,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:11:56,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:56,558 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:56,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:11:59,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:11:59,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:59,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:11:59,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:59,217 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:11:59,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:11:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:59,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:04,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640605657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:04,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:12:04,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 41 [2022-11-19 07:12:04,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512307753] [2022-11-19 07:12:04,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:12:04,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:12:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:04,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:12:04,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:12:04,416 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2022-11-19 07:12:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:26,326 INFO L93 Difference]: Finished difference Result 1003 states and 2162 transitions. [2022-11-19 07:12:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:12:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:12:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:26,331 INFO L225 Difference]: With dead ends: 1003 [2022-11-19 07:12:26,331 INFO L226 Difference]: Without dead ends: 1003 [2022-11-19 07:12:26,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=815, Invalid=1941, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:12:26,332 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3420 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:26,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 278 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2086 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-19 07:12:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-19 07:12:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 93. [2022-11-19 07:12:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 2.098901098901099) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2022-11-19 07:12:26,342 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 12 [2022-11-19 07:12:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:26,343 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2022-11-19 07:12:26,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2022-11-19 07:12:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2022-11-19 07:12:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:12:26,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:26,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:26,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:26,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:26,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:26,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:26,957 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:12:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash 867286368, now seen corresponding path program 1 times [2022-11-19 07:12:26,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:26,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306291961] [2022-11-19 07:12:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:26,959 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 [2022-11-19 07:12:26,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:26,959 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:12:26,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-19 07:12:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:12:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:27,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:27,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306291961] [2022-11-19 07:12:27,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306291961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:27,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:27,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:12:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146917474] [2022-11-19 07:12:27,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:27,103 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:27,221 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2022-11-19 07:12:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:27,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:12:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:27,222 INFO L225 Difference]: With dead ends: 110 [2022-11-19 07:12:27,222 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 07:12:27,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:27,223 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:27,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 07:12:27,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-11-19 07:12:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2022-11-19 07:12:27,226 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 14 [2022-11-19 07:12:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:27,226 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2022-11-19 07:12:27,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2022-11-19 07:12:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:12:27,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:27,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:27,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:27,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:27,438 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:12:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1269313022, now seen corresponding path program 1 times [2022-11-19 07:12:27,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:27,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438288505] [2022-11-19 07:12:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:27,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:27,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:27,440 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:12:27,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:12:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:12:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:27,681 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 [2022-11-19 07:12:27,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:12:27,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:12:27,902 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 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-19 07:12:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:12:28,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:28,326 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 188 treesize of output 184 [2022-11-19 07:12:28,533 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:12:28,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2022-11-19 07:12:28,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2022-11-19 07:12:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:12:34,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438288505] [2022-11-19 07:12:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438288505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [421029387] [2022-11-19 07:12:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:34,187 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:34,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:12:34,191 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:12:34,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-19 07:12:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:34,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:12:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:34,655 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:34,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:34,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-19 07:12:34,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:12:35,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:12:35,555 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 [2022-11-19 07:12:36,074 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 79 treesize of output 19 [2022-11-19 07:12:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:36,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:36,679 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 [2022-11-19 07:12:36,794 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 [2022-11-19 07:12:44,846 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (bvmul (_ bv4 32) c_~front~0)) (.cse11 (bvmul (_ bv4 32) c_~back~0))) (let ((.cse8 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse11)) (.cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse10)) (.cse13 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse10)) (.cse12 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse11)) (.cse14 (select |c_#length| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (let ((.cse5 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse11)) (.cse6 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse11)) (.cse7 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse11 (_ bv1 32))) (.cse1 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse10)) (.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse10)) (.cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse10 (_ bv1 32)))) (and (forall ((v_ArrVal_835 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_834 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_834) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_835) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (bvslt (bvadd (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4)) c_~sum~0) (_ bv0 32))) (not (= (concat (concat (concat (select .cse0 .cse5) (select .cse0 .cse6)) (select .cse0 .cse7)) (select .cse0 .cse8)) (_ bv1 32)))))) (forall ((v_ArrVal_835 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_834 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse9 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_834) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_835) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (concat (concat (concat (select .cse9 .cse5) (select .cse9 .cse6)) (select .cse9 .cse7)) (select .cse9 .cse8)) (_ bv1 32))) (not (bvsgt (bvadd (concat (concat (concat (select .cse9 .cse1) (select .cse9 .cse2)) (select .cse9 .cse3)) (select .cse9 .cse4)) c_~sum~0) (_ bv1 32)))))))) (not (bvule .cse8 .cse12)) (not (bvsge c_~back~0 (_ bv0 32))) (not (bvule .cse4 .cse13)) (not (bvule .cse13 .cse14)) (= (_ bv2147483647 32) c_~back~0) (not (bvule .cse12 .cse14)) (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)))) is different from false [2022-11-19 07:12:45,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:12:45,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:12:45,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:12:45,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 359 [2022-11-19 07:12:45,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:12:45,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 311 treesize of output 251 [2022-11-19 07:12:45,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:12:45,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:12:45,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 197 [2022-11-19 07:13:50,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:13:50,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:13:50,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:13:50,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 781 treesize of output 689 [2022-11-19 07:13:50,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:13:50,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 641 treesize of output 581 [2022-11-19 07:13:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:13:50,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 533 treesize of output 365 [2022-11-19 07:14:47,743 WARN L233 SmtUtils]: Spent 12.92s on a formula simplification. DAG size of input: 949 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:14:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:14:47,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [421029387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308110683] [2022-11-19 07:14:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:47,746 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:47,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 07:14:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:47,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:14:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:48,532 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 [2022-11-19 07:14:48,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:14:49,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:14:49,088 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 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-19 07:14:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:49,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:50,441 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:14:50,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 446 treesize of output 284 [2022-11-19 07:14:50,459 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 210 treesize of output 206 [2022-11-19 07:14:50,474 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 206 treesize of output 202 [2022-11-19 07:15:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:15:02,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308110683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:02,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:15:02,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 8, 8] total 34 [2022-11-19 07:15:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849069143] [2022-11-19 07:15:02,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:15:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:15:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:15:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=942, Unknown=6, NotChecked=66, Total=1260 [2022-11-19 07:15:02,096 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 36 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:04,358 INFO L93 Difference]: Finished difference Result 125 states and 269 transitions. [2022-11-19 07:15:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:15:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:15:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:04,362 INFO L225 Difference]: With dead ends: 125 [2022-11-19 07:15:04,362 INFO L226 Difference]: Without dead ends: 117 [2022-11-19 07:15:04,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=385, Invalid=1505, Unknown=6, NotChecked=84, Total=1980 [2022-11-19 07:15:04,363 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:04,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-19 07:15:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-19 07:15:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 63. [2022-11-19 07:15:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 125 transitions. [2022-11-19 07:15:04,367 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 125 transitions. Word has length 18 [2022-11-19 07:15:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:04,367 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 125 transitions. [2022-11-19 07:15:04,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 125 transitions. [2022-11-19 07:15:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:15:04,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:04,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:04,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:04,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-19 07:15:04,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-19 07:15:04,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:04,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:15:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1718538500, now seen corresponding path program 2 times [2022-11-19 07:15:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:15:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169955931] [2022-11-19 07:15:04,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:15:04,973 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 [2022-11-19 07:15:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:15:04,974 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:15:04,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:15:05,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:15:05,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:15:05,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:15:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:05,267 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 [2022-11-19 07:15:05,289 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 10 treesize of output 8 [2022-11-19 07:15:05,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:05,509 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 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-19 07:15:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:15:05,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:06,005 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 188 treesize of output 184 [2022-11-19 07:15:06,274 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:15:06,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2022-11-19 07:15:06,287 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 114 treesize of output 110 [2022-11-19 07:15:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:15:12,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:15:12,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169955931] [2022-11-19 07:15:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169955931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159467468] [2022-11-19 07:15:12,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:15:12,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:15:12,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:15:12,863 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:15:12,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-19 07:15:13,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:15:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:15:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:15:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:13,318 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:15:13,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:15:13,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:13,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-19 07:15:13,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:15:13,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:15:14,289 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 7 treesize of output 5 [2022-11-19 07:15:14,729 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 79 treesize of output 19 [2022-11-19 07:15:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:15:14,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:15,390 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 [2022-11-19 07:15:15,532 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 [2022-11-19 07:15:26,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:26,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:15:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:26,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 781 treesize of output 689 [2022-11-19 07:15:26,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:26,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 641 treesize of output 581 [2022-11-19 07:15:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:26,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:27,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:27,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 533 treesize of output 365 [2022-11-19 07:16:00,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:16:00,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:16:00,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:16:00,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 781 treesize of output 689 [2022-11-19 07:16:00,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:00,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:16:01,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 641 treesize of output 473 [2022-11-19 07:16:01,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:01,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:16:01,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 425 treesize of output 365 [2022-11-19 07:16:51,548 WARN L233 SmtUtils]: Spent 11.04s on a formula simplification. DAG size of input: 839 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:16:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:51,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159467468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301273646] [2022-11-19 07:16:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:16:51,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:51,553 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:51,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 07:16:51,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:16:51,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:51,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:16:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:52,418 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 [2022-11-19 07:16:52,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:16:53,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:16:53,002 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 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-19 07:16:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:53,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:54,561 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:16:54,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 446 treesize of output 284 [2022-11-19 07:16:54,580 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 210 treesize of output 206 [2022-11-19 07:16:54,598 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 206 treesize of output 202 [2022-11-19 07:17:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:08,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301273646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:08,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:17:08,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 8, 8] total 34 [2022-11-19 07:17:08,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353859418] [2022-11-19 07:17:08,118 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:08,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:17:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:17:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=994, Unknown=9, NotChecked=0, Total=1260 [2022-11-19 07:17:08,119 INFO L87 Difference]: Start difference. First operand 63 states and 125 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:11,735 INFO L93 Difference]: Finished difference Result 116 states and 250 transitions. [2022-11-19 07:17:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:17:11,735 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:17:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:11,736 INFO L225 Difference]: With dead ends: 116 [2022-11-19 07:17:11,736 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 07:17:11,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=424, Invalid=1637, Unknown=9, NotChecked=0, Total=2070 [2022-11-19 07:17:11,738 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:11,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-11-19 07:17:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 07:17:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 65. [2022-11-19 07:17:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 129 transitions. [2022-11-19 07:17:11,742 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 129 transitions. Word has length 18 [2022-11-19 07:17:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:11,743 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 129 transitions. [2022-11-19 07:17:11,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 129 transitions. [2022-11-19 07:17:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:17:11,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:11,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:11,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:17:11,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:12,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-19 07:17:12,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:12,359 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:17:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1029670684, now seen corresponding path program 3 times [2022-11-19 07:17:12,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:12,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897504645] [2022-11-19 07:17:12,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:12,360 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 [2022-11-19 07:17:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:12,361 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:17:12,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:17:12,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:17:12,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:12,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:17:12,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:12,642 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 [2022-11-19 07:17:12,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:17:12,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:17:12,896 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 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-19 07:17:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:13,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:13,459 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 188 treesize of output 184 [2022-11-19 07:17:13,758 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:17:13,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2022-11-19 07:17:13,770 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 114 treesize of output 110 [2022-11-19 07:17:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:23,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897504645] [2022-11-19 07:17:23,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897504645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401311542] [2022-11-19 07:17:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:23,008 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:17:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:17:23,009 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:17:23,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-19 07:17:23,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:17:23,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:17:23,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:23,481 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:17:23,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:17:23,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:23,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:23,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-19 07:17:23,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:17:24,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:17:24,533 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 [2022-11-19 07:17:25,011 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 79 treesize of output 19 [2022-11-19 07:17:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:25,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:25,662 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 [2022-11-19 07:17:25,821 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 [2022-11-19 07:17:37,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:17:37,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:17:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:17:37,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 359 [2022-11-19 07:17:37,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:17:37,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 311 treesize of output 251 [2022-11-19 07:17:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:37,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:17:37,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 197 [2022-11-19 07:18:21,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:18:21,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:18:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:18:21,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 359 [2022-11-19 07:18:21,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:18:22,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 311 treesize of output 251 [2022-11-19 07:18:22,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:18:22,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:18:22,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 197 [2022-11-19 07:19:28,941 WARN L233 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 864 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:19:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:28,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401311542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:28,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712565768] [2022-11-19 07:19:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:19:28,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:28,944 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:28,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-19 07:19:29,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:19:29,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:29,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:19:29,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:29,801 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 [2022-11-19 07:19:29,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:19:30,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:19:30,377 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 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-19 07:19:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:30,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:31,851 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:19:31,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 446 treesize of output 284 [2022-11-19 07:19:31,869 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 210 treesize of output 206 [2022-11-19 07:19:31,886 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 206 treesize of output 202 [2022-11-19 07:19:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:47,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712565768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:47,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:19:47,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 8, 8] total 34 [2022-11-19 07:19:47,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907565659] [2022-11-19 07:19:47,546 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:47,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:19:47,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:19:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=991, Unknown=12, NotChecked=0, Total=1260 [2022-11-19 07:19:47,548 INFO L87 Difference]: Start difference. First operand 65 states and 129 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:50,041 INFO L93 Difference]: Finished difference Result 112 states and 242 transitions. [2022-11-19 07:19:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:19:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:19:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:50,043 INFO L225 Difference]: With dead ends: 112 [2022-11-19 07:19:50,043 INFO L226 Difference]: Without dead ends: 104 [2022-11-19 07:19:50,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=401, Invalid=1567, Unknown=12, NotChecked=0, Total=1980 [2022-11-19 07:19:50,045 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:50,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-19 07:19:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-19 07:19:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2022-11-19 07:19:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 129 transitions. [2022-11-19 07:19:50,048 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 129 transitions. Word has length 18 [2022-11-19 07:19:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:50,049 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 129 transitions. [2022-11-19 07:19:50,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 129 transitions. [2022-11-19 07:19:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:19:50,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:50,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:50,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:19:50,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-19 07:19:50,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:50,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:50,664 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:19:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash 528522396, now seen corresponding path program 4 times [2022-11-19 07:19:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:50,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30004295] [2022-11-19 07:19:50,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:19:50,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:50,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:50,666 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:19:50,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:19:50,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:19:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:50,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:19:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:50,951 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 [2022-11-19 07:19:50,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:19:51,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:19:51,205 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 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-19 07:19:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:19:51,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:51,736 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 188 treesize of output 184 [2022-11-19 07:19:52,025 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:19:52,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2022-11-19 07:19:52,038 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 114 treesize of output 110 [2022-11-19 07:19:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:19:58,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:58,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30004295] [2022-11-19 07:19:58,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30004295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:58,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329500711] [2022-11-19 07:19:58,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:19:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:19:58,046 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:19:58,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-19 07:19:58,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:19:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:58,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:19:58,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:58,626 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:19:58,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:19:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:58,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-19 07:19:59,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:19:59,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:19:59,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-19 07:20:00,243 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 79 treesize of output 19 [2022-11-19 07:20:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:00,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:01,029 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 [2022-11-19 07:20:01,203 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 [2022-11-19 07:20:06,865 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (bvmul (_ bv4 32) c_~front~0)) (.cse13 (bvmul (_ bv4 32) c_~back~0))) (let ((.cse10 (bvadd c_~queue~0.offset .cse13)) (.cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse13)) (.cse6 (bvadd c_~queue~0.offset .cse12)) (.cse14 (bvadd c_~queue~0.offset (_ bv4 32) .cse12)) (.cse1 (select |c_#length| c_~queue~0.base))) (or (not (bvsge c_~back~0 (_ bv0 32))) (not (bvule .cse0 .cse1)) (let ((.cse7 (bvadd c_~queue~0.offset (_ bv3 32) .cse13)) (.cse8 (bvadd c_~queue~0.offset (_ bv2 32) .cse13)) (.cse9 (bvadd c_~queue~0.offset .cse13 (_ bv1 32))) (.cse3 (bvadd c_~queue~0.offset (_ bv3 32) .cse12)) (.cse4 (bvadd c_~queue~0.offset (_ bv2 32) .cse12)) (.cse5 (bvadd c_~queue~0.offset .cse12 (_ bv1 32)))) (and (forall ((v_ArrVal_1081 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1081) c_~queue~0.base))) (or (not (bvsgt (bvadd (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 .cse6)) c_~sum~0) (_ bv1 32))) (not (= (concat (concat (concat (select .cse2 .cse7) (select .cse2 .cse8)) (select .cse2 .cse9)) (select .cse2 .cse10)) (_ bv1 32)))))) (forall ((v_ArrVal_1081 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1081) c_~queue~0.base))) (or (not (= (concat (concat (concat (select .cse11 .cse7) (select .cse11 .cse8)) (select .cse11 .cse9)) (select .cse11 .cse10)) (_ bv1 32))) (not (bvslt (bvadd (concat (concat (concat (select .cse11 .cse3) (select .cse11 .cse4)) (select .cse11 .cse5)) (select .cse11 .cse6)) c_~sum~0) (_ bv0 32)))))))) (not (bvule .cse10 .cse0)) (not (bvule .cse6 .cse14)) (= (_ bv2147483647 32) c_~back~0) (not (bvule .cse14 .cse1))))) is different from false [2022-11-19 07:20:10,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:20:10,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:20:10,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:20:10,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 359 [2022-11-19 07:20:10,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:20:10,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 311 treesize of output 251 [2022-11-19 07:20:10,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:10,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:20:10,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 197 [2022-11-19 07:21:22,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:21:22,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:21:22,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:21:23,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 781 treesize of output 689 [2022-11-19 07:21:23,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:21:23,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 641 treesize of output 473 [2022-11-19 07:21:23,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:23,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:21:23,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 425 treesize of output 365 [2022-11-19 07:22:42,653 WARN L233 SmtUtils]: Spent 14.62s on a formula simplification. DAG size of input: 858 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:22:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:42,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329500711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:42,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719919514] [2022-11-19 07:22:42,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:22:42,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:42,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:42,658 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:42,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-19 07:22:42,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:22:42,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:22:42,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:22:42,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:43,525 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 [2022-11-19 07:22:43,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:22:44,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:22:44,103 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 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-19 07:22:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:44,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:45,613 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:22:45,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 446 treesize of output 284 [2022-11-19 07:22:45,633 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 210 treesize of output 206 [2022-11-19 07:22:45,652 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 206 treesize of output 202 [2022-11-19 07:22:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:59,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719919514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:59,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:22:59,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 8, 8] total 34 [2022-11-19 07:22:59,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680406113] [2022-11-19 07:22:59,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:22:59,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:22:59,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:22:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=943, Unknown=6, NotChecked=66, Total=1260 [2022-11-19 07:22:59,861 INFO L87 Difference]: Start difference. First operand 65 states and 129 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:02,353 INFO L93 Difference]: Finished difference Result 116 states and 256 transitions. [2022-11-19 07:23:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:23:02,355 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:23:02,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:02,355 INFO L225 Difference]: With dead ends: 116 [2022-11-19 07:23:02,356 INFO L226 Difference]: Without dead ends: 108 [2022-11-19 07:23:02,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=382, Invalid=1508, Unknown=6, NotChecked=84, Total=1980 [2022-11-19 07:23:02,358 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:02,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-19 07:23:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-19 07:23:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2022-11-19 07:23:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 2.0625) internal successors, (132), 65 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 132 transitions. [2022-11-19 07:23:02,362 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 132 transitions. Word has length 18 [2022-11-19 07:23:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:02,363 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 132 transitions. [2022-11-19 07:23:02,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 132 transitions. [2022-11-19 07:23:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:23:02,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:02,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:02,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-19 07:23:02,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-19 07:23:02,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-19 07:23:02,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:23:02,979 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-19 07:23:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2046911902, now seen corresponding path program 5 times [2022-11-19 07:23:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:02,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720235735] [2022-11-19 07:23:02,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:23:02,980 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 [2022-11-19 07:23:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:02,981 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:23:02,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:03,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:23:03,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:23:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:23:03,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:03,602 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 [2022-11-19 07:23:03,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:23:03,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:23:03,824 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 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-19 07:23:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:03,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:04,526 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 188 treesize of output 184 [2022-11-19 07:23:04,837 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:23:04,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2022-11-19 07:23:04,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2022-11-19 07:23:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:17,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:17,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720235735] [2022-11-19 07:23:17,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720235735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:17,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402978743] [2022-11-19 07:23:17,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:23:17,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:23:17,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:23:17,402 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:23:17,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-19 07:23:17,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:23:17,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:23:17,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:23:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:18,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-19 07:23:18,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:23:18,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:23:18,931 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 [2022-11-19 07:23:18,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:23:19,315 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 79 treesize of output 19 [2022-11-19 07:23:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:19,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:19,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 07:23:19,807 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 [2022-11-19 07:23:19,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 07:23:19,961 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 [2022-11-19 07:23:25,581 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (bvmul (_ bv4 32) c_~back~0))) (let ((.cse4 (bvadd c_~queue~0.offset .cse10))) (or (not (bvslt c_~front~0 c_~n~0)) (not (bvsge c_~back~0 (_ bv0 32))) (let ((.cse11 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse5 (bvadd c_~queue~0.offset (_ bv3 32) .cse11)) (.cse6 (bvadd c_~queue~0.offset (_ bv2 32) .cse11)) (.cse7 (bvadd c_~queue~0.offset .cse11 (_ bv1 32))) (.cse8 (bvadd c_~queue~0.offset .cse11)) (.cse1 (bvadd c_~queue~0.offset (_ bv3 32) .cse10)) (.cse2 (bvadd c_~queue~0.offset (_ bv2 32) .cse10)) (.cse3 (bvadd c_~queue~0.offset .cse10 (_ bv1 32)))) (and (forall ((v_ArrVal_1160 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1160) c_~queue~0.base))) (or (not (= (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4)) (_ bv1 32))) (not (bvslt (bvadd (concat (concat (concat (select .cse0 .cse5) (select .cse0 .cse6)) (select .cse0 .cse7)) (select .cse0 .cse8)) c_~sum~0) (_ bv0 32)))))) (forall ((v_ArrVal_1160 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1160) c_~queue~0.base))) (or (not (bvsgt (bvadd (concat (concat (concat (select .cse9 .cse5) (select .cse9 .cse6)) (select .cse9 .cse7)) (select .cse9 .cse8)) c_~sum~0) (_ bv1 32))) (not (= (concat (concat (concat (select .cse9 .cse1) (select .cse9 .cse2)) (select .cse9 .cse3)) (select .cse9 .cse4)) (_ bv1 32))))))))) (not (bvule .cse4 (bvadd c_~queue~0.offset (_ bv4 32) .cse10))) (not (bvsge c_~front~0 (_ bv0 32))) (not (bvslt c_~back~0 c_~n~0))))) is different from false [2022-11-19 07:23:32,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:23:32,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:23:33,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:23:33,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 781 treesize of output 689 [2022-11-19 07:23:33,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:23:33,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 641 treesize of output 581 [2022-11-19 07:23:33,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:33,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:23:33,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 533 treesize of output 365 [2022-11-19 07:24:03,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:24:03,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 429 treesize of output 192 [2022-11-19 07:24:03,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:24:03,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 781 treesize of output 689 [2022-11-19 07:24:03,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:03,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:24:04,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 641 treesize of output 581 [2022-11-19 07:24:04,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:24:04,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:24:04,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 533 treesize of output 365 [2022-11-19 07:24:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:37,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402978743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979917110] [2022-11-19 07:24:37,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:24:37,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:37,258 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:37,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd180d27-b1e3-4295-b8c1-b01922e85985/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-19 07:24:37,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:24:37,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:24:37,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:38,273 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 [2022-11-19 07:24:38,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:24:40,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:24:40,877 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 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-19 07:24:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:40,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:42,480 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 07:24:42,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 446 treesize of output 284 [2022-11-19 07:24:42,500 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 210 treesize of output 206 [2022-11-19 07:24:42,525 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 206 treesize of output 202 [2022-11-19 07:24:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:55,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979917110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:55,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:24:55,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8, 8, 8] total 36 [2022-11-19 07:24:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771788458] [2022-11-19 07:24:55,598 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:24:55,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:24:55,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:24:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1033, Unknown=11, NotChecked=70, Total=1406 [2022-11-19 07:24:55,600 INFO L87 Difference]: Start difference. First operand 66 states and 132 transitions. Second operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 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) [2022-11-19 07:24:56,005 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse14 (bvmul (_ bv4 32) c_~back~0))) (let ((.cse11 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse14))) (let ((.cse0 (not (bvslt c_~front~0 c_~n~0))) (.cse15 (not (bvsge c_~front~0 (_ bv0 32)))) (.cse13 (bvmul (_ bv4 32) c_~front~0)) (.cse1 (not (bvule .cse11 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse14)))) (.cse2 (not (bvsge c_~back~0 (_ bv0 32)))) (.cse16 (not (bvslt c_~back~0 c_~n~0))) (.cse17 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|))) (and (or .cse0 .cse1 .cse2 (let ((.cse8 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse14)) (.cse9 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse14)) (.cse10 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse14 (_ bv1 32))) (.cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse13)) (.cse5 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse13)) (.cse6 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse13 (_ bv1 32))) (.cse7 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse13))) (and (forall ((v_ArrVal_1160 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1159 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1159) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1160) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (bvsgt (bvadd (concat (concat (concat (select .cse3 .cse4) (select .cse3 .cse5)) (select .cse3 .cse6)) (select .cse3 .cse7)) c_~sum~0) (_ bv1 32))) (not (= (concat (concat (concat (select .cse3 .cse8) (select .cse3 .cse9)) (select .cse3 .cse10)) (select .cse3 .cse11)) (_ bv1 32)))))) (forall ((v_ArrVal_1160 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1159 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1159) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1160) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (concat (concat (concat (select .cse12 .cse8) (select .cse12 .cse9)) (select .cse12 .cse10)) (select .cse12 .cse11)) (_ bv1 32))) (not (bvslt (bvadd (concat (concat (concat (select .cse12 .cse4) (select .cse12 .cse5)) (select .cse12 .cse6)) (select .cse12 .cse7)) c_~sum~0) (_ bv0 32)))))))) .cse15 .cse16 .cse17) (or .cse0 .cse15 (and (or .cse1 .cse2 (= .cse13 .cse14) .cse16) (or .cse1 .cse2 .cse16 (forall ((v_arrayElimCell_368 (_ BitVec 8)) (v_arrayElimCell_367 (_ BitVec 8)) (v_arrayElimCell_361 (_ BitVec 8)) (v_arrayElimCell_364 (_ BitVec 8))) (let ((.cse18 (concat (concat (concat v_arrayElimCell_367 v_arrayElimCell_364) v_arrayElimCell_361) v_arrayElimCell_368))) (or (not (bvsgt (bvadd c_~sum~0 .cse18) (_ bv1 32))) (not (= (_ bv1 32) .cse18)))))) (or .cse1 .cse2 .cse16 (forall ((v_arrayElimCell_368 (_ BitVec 8)) (v_arrayElimCell_367 (_ BitVec 8)) (v_arrayElimCell_361 (_ BitVec 8)) (v_arrayElimCell_364 (_ BitVec 8))) (let ((.cse19 (concat (concat (concat v_arrayElimCell_367 v_arrayElimCell_364) v_arrayElimCell_361) v_arrayElimCell_368))) (or (not (bvslt (bvadd c_~sum~0 .cse19) (_ bv0 32))) (not (= (_ bv1 32) .cse19))))))) .cse17))))) is different from false [2022-11-19 07:25:19,599 WARN L233 SmtUtils]: Spent 18.65s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:25:44,914 WARN L233 SmtUtils]: Spent 20.49s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)