./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:49:35,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:49:35,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:49:35,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:49:35,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:49:35,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:49:35,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:49:35,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:49:35,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:49:35,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:49:35,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:49:35,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:49:35,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:49:35,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:49:35,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:49:35,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:49:35,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:49:35,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:49:35,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:49:35,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:49:35,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:49:35,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:49:35,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:49:35,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:49:36,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:49:36,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:49:36,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:49:36,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:49:36,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:49:36,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:49:36,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:49:36,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:49:36,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:49:36,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:49:36,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:49:36,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:49:36,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:49:36,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:49:36,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:49:36,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:49:36,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:49:36,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:49:36,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:49:36,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:49:36,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:49:36,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:49:36,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:49:36,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:49:36,050 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:49:36,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:49:36,050 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:49:36,051 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:49:36,051 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:49:36,051 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:49:36,051 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:49:36,051 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:49:36,052 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:49:36,052 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:49:36,052 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:49:36,052 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:49:36,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:49:36,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:49:36,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:49:36,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:49:36,054 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:49:36,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:49:36,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:49:36,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:49:36,054 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:49:36,054 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:49:36,055 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:49:36,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:49:36,055 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:49:36,055 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:49:36,055 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:49:36,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:49:36,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:49:36,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:49:36,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:49:36,056 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:49:36,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:49:36,057 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:49:36,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:49:36,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:49:36,057 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_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad [2022-11-25 23:49:36,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:49:36,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:49:36,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:49:36,388 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:49:36,388 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:49:36,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-25 23:49:39,490 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:49:39,735 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:49:39,741 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-25 23:49:39,751 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data/e48bc6150/a44a4ab0f61d4f368c7559de07fd4735/FLAG71946d5c6 [2022-11-25 23:49:39,773 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data/e48bc6150/a44a4ab0f61d4f368c7559de07fd4735 [2022-11-25 23:49:39,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:49:39,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:49:39,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:49:39,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:49:39,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:49:39,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:49:39" (1/1) ... [2022-11-25 23:49:39,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b4864b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:39, skipping insertion in model container [2022-11-25 23:49:39,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:49:39" (1/1) ... [2022-11-25 23:49:39,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:49:39,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:49:40,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:40,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:40,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:40,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:40,031 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:40,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:40,041 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-25 23:49:40,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:49:40,062 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 23:49:40,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61a0f6c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:40, skipping insertion in model container [2022-11-25 23:49:40,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:49:40,064 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 23:49:40,065 INFO L158 Benchmark]: Toolchain (without parser) took 281.02ms. Allocated memory is still 157.3MB. Free memory was 124.7MB in the beginning and 125.7MB in the end (delta: -1.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-25 23:49:40,066 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 121.6MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:49:40,067 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.53ms. Allocated memory is still 157.3MB. Free memory was 124.7MB in the beginning and 125.7MB in the end (delta: -1.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-25 23:49:40,068 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 121.6MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.53ms. Allocated memory is still 157.3MB. Free memory was 124.7MB in the beginning and 125.7MB in the end (delta: -1.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:49:42,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:49:42,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:49:42,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:49:42,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:49:42,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:49:42,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:49:42,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:49:42,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:49:42,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:49:42,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:49:42,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:49:42,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:49:42,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:49:42,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:49:42,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:49:42,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:49:42,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:49:42,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:49:42,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:49:42,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:49:42,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:49:42,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:49:42,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:49:42,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:49:42,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:49:42,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:49:42,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:49:42,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:49:42,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:49:42,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:49:42,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:49:42,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:49:42,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:49:42,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:49:42,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:49:42,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:49:42,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:49:42,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:49:42,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:49:42,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:49:42,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 23:49:42,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:49:42,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:49:42,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:49:42,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:49:42,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:49:42,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:49:42,468 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:49:42,469 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:49:42,469 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:49:42,469 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:49:42,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:49:42,470 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:49:42,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:49:42,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:49:42,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:49:42,471 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:49:42,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:49:42,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:49:42,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:49:42,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:49:42,472 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:49:42,472 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:49:42,473 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:49:42,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:49:42,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:49:42,473 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:49:42,473 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:49:42,474 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:49:42,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:49:42,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:49:42,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:49:42,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:49:42,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:49:42,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:49:42,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:49:42,475 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:49:42,476 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:49:42,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:49:42,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:49:42,476 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_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad [2022-11-25 23:49:42,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:49:42,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:49:42,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:49:42,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:49:42,816 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:49:42,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-25 23:49:46,100 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:49:46,314 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:49:46,314 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-25 23:49:46,322 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data/f02480221/decc56380849409189cedabca9ffb3a3/FLAG57cabf7b3 [2022-11-25 23:49:46,335 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/data/f02480221/decc56380849409189cedabca9ffb3a3 [2022-11-25 23:49:46,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:49:46,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:49:46,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:49:46,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:49:46,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:49:46,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d02a034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46, skipping insertion in model container [2022-11-25 23:49:46,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:49:46,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:49:46,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,631 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,650 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-25 23:49:46,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:49:46,700 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 23:49:46,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:49:46,728 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,730 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,734 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,736 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,753 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-25 23:49:46,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:49:46,768 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:49:46,789 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,797 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:49:46,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:49:46,815 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-25 23:49:46,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:49:46,850 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:49:46,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46 WrapperNode [2022-11-25 23:49:46,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:49:46,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:49:46,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:49:46,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:49:46,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,936 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 225 [2022-11-25 23:49:46,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:49:46,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:49:46,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:49:46,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:49:46,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:46,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:47,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:47,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:47,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:49:47,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:49:47,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:49:47,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:49:47,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (1/1) ... [2022-11-25 23:49:47,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:49:47,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:47,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:49:47,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:49:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:49:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:49:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:49:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 23:49:47,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:49:47,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:49:47,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:49:47,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:49:47,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:49:47,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:49:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 23:49:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 23:49:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:49:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:49:47,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:49:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:49:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 23:49:47,125 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:49:47,323 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:49:47,337 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:49:48,352 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:49:48,554 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:49:48,554 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 23:49:48,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:49:48 BoogieIcfgContainer [2022-11-25 23:49:48,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:49:48,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:49:48,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:49:48,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:49:48,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:49:46" (1/3) ... [2022-11-25 23:49:48,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e54057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:49:48, skipping insertion in model container [2022-11-25 23:49:48,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:49:46" (2/3) ... [2022-11-25 23:49:48,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e54057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:49:48, skipping insertion in model container [2022-11-25 23:49:48,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:49:48" (3/3) ... [2022-11-25 23:49:48,572 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2022-11-25 23:49:48,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:49:48,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2022-11-25 23:49:48,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:49:48,741 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 23:49:48,795 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:49:48,824 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 340 places, 357 transitions, 738 flow [2022-11-25 23:49:48,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 340 places, 357 transitions, 738 flow [2022-11-25 23:49:48,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 357 transitions, 738 flow [2022-11-25 23:49:48,996 INFO L130 PetriNetUnfolder]: 27/354 cut-off events. [2022-11-25 23:49:48,996 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 23:49:49,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 354 events. 27/354 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 412 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 274. Up to 3 conditions per place. [2022-11-25 23:49:49,007 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2022-11-25 23:51:02,794 INFO L134 LiptonReduction]: Checked pairs total: 9109 [2022-11-25 23:51:02,795 INFO L136 LiptonReduction]: Total number of compositions: 419 [2022-11-25 23:51:02,803 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 84 transitions, 192 flow [2022-11-25 23:51:03,025 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:03,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:51:03,057 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;@b9254cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:51:03,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-25 23:51:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:51:03,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:03,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:51:03,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:51:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:03,095 INFO L85 PathProgramCache]: Analyzing trace with hash 45785, now seen corresponding path program 1 times [2022-11-25 23:51:03,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:03,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886540965] [2022-11-25 23:51:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:03,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:03,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:03,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:51:03,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 23:51:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:51:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:03,431 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:51:03,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:51:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:03,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:03,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886540965] [2022-11-25 23:51:03,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886540965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:03,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:51:03,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:51:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558840964] [2022-11-25 23:51:03,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:03,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:03,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:51:03,566 INFO L87 Difference]: Start difference. First operand has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:04,243 INFO L93 Difference]: Finished difference Result 2816 states and 10887 transitions. [2022-11-25 23:51:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:51:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:04,286 INFO L225 Difference]: With dead ends: 2816 [2022-11-25 23:51:04,286 INFO L226 Difference]: Without dead ends: 2816 [2022-11-25 23:51:04,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:51:04,290 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:04,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 4 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:51:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-11-25 23:51:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2816. [2022-11-25 23:51:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2364 states have (on average 4.605329949238579) internal successors, (10887), 2815 states have internal predecessors, (10887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 10887 transitions. [2022-11-25 23:51:04,502 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 10887 transitions. Word has length 2 [2022-11-25 23:51:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:04,502 INFO L495 AbstractCegarLoop]: Abstraction has 2816 states and 10887 transitions. [2022-11-25 23:51:04,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 10887 transitions. [2022-11-25 23:51:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:51:04,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:04,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:51:04,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:04,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:51:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash 45786, now seen corresponding path program 1 times [2022-11-25 23:51:04,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:04,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38454759] [2022-11-25 23:51:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:04,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:51:04,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 23:51:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:04,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:51:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:05,070 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:05,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:05,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:05,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:05,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38454759] [2022-11-25 23:51:05,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38454759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:05,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:51:05,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:51:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466401612] [2022-11-25 23:51:05,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:05,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:51:05,125 INFO L87 Difference]: Start difference. First operand 2816 states and 10887 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:05,812 INFO L93 Difference]: Finished difference Result 2817 states and 10889 transitions. [2022-11-25 23:51:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:05,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:51:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:05,837 INFO L225 Difference]: With dead ends: 2817 [2022-11-25 23:51:05,838 INFO L226 Difference]: Without dead ends: 2817 [2022-11-25 23:51:05,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:51:05,839 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:05,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:51:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-11-25 23:51:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2817. [2022-11-25 23:51:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2365 states have (on average 4.604228329809725) internal successors, (10889), 2816 states have internal predecessors, (10889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 10889 transitions. [2022-11-25 23:51:06,001 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 10889 transitions. Word has length 2 [2022-11-25 23:51:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:06,001 INFO L495 AbstractCegarLoop]: Abstraction has 2817 states and 10889 transitions. [2022-11-25 23:51:06,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 10889 transitions. [2022-11-25 23:51:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:51:06,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:06,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:51:06,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:06,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:06,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:51:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1428107, now seen corresponding path program 1 times [2022-11-25 23:51:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037503128] [2022-11-25 23:51:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:06,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:06,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:51:06,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 23:51:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:51:06,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:06,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:06,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:06,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:06,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:06,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037503128] [2022-11-25 23:51:06,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037503128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:06,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970386338] [2022-11-25 23:51:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:06,980 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:51:06,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:51:06,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:51:07,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-25 23:51:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:07,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:51:07,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:07,318 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:07,318 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:07,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:07,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [970386338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:07,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990376713] [2022-11-25 23:51:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:07,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:07,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:07,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:07,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:51:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:51:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:07,747 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:07,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:07,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:08,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990376713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:08,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:51:08,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-25 23:51:08,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726059775] [2022-11-25 23:51:08,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:08,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:51:08,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:51:08,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:51:08,089 INFO L87 Difference]: Start difference. First operand 2817 states and 10889 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:10,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:11,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:14,631 INFO L93 Difference]: Finished difference Result 11255 states and 43547 transitions. [2022-11-25 23:51:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:51:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 23:51:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:14,799 INFO L225 Difference]: With dead ends: 11255 [2022-11-25 23:51:14,800 INFO L226 Difference]: Without dead ends: 11255 [2022-11-25 23:51:14,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:51:14,805 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 335 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:14,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 32 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-25 23:51:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2022-11-25 23:51:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 2828. [2022-11-25 23:51:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2376 states have (on average 4.601851851851852) internal successors, (10934), 2827 states have internal predecessors, (10934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 10934 transitions. [2022-11-25 23:51:15,220 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 10934 transitions. Word has length 3 [2022-11-25 23:51:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:15,221 INFO L495 AbstractCegarLoop]: Abstraction has 2828 states and 10934 transitions. [2022-11-25 23:51:15,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 10934 transitions. [2022-11-25 23:51:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:51:15,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:15,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:51:15,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:15,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:15,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:15,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:15,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:51:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1372766544, now seen corresponding path program 1 times [2022-11-25 23:51:15,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:15,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152644665] [2022-11-25 23:51:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:15,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:15,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:51:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 23:51:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:51:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:16,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:16,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:16,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152644665] [2022-11-25 23:51:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152644665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:16,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1360535859] [2022-11-25 23:51:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:51:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:51:16,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:51:16,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-25 23:51:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:51:16,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:16,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:16,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1360535859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301804563] [2022-11-25 23:51:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:16,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:16,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:16,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:51:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:51:16,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:51:16,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:16,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301804563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:16,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-25 23:51:16,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 12 [2022-11-25 23:51:16,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690732822] [2022-11-25 23:51:16,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:16,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:51:16,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:16,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:51:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:51:16,773 INFO L87 Difference]: Start difference. First operand 2828 states and 10934 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:17,474 INFO L93 Difference]: Finished difference Result 2828 states and 10926 transitions. [2022-11-25 23:51:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:51:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:51:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:17,493 INFO L225 Difference]: With dead ends: 2828 [2022-11-25 23:51:17,493 INFO L226 Difference]: Without dead ends: 2828 [2022-11-25 23:51:17,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:51:17,494 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:17,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 10 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:51:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-11-25 23:51:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2828. [2022-11-25 23:51:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2376 states have (on average 4.598484848484849) internal successors, (10926), 2827 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 10926 transitions. [2022-11-25 23:51:17,665 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 10926 transitions. Word has length 5 [2022-11-25 23:51:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:17,665 INFO L495 AbstractCegarLoop]: Abstraction has 2828 states and 10926 transitions. [2022-11-25 23:51:17,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 10926 transitions. [2022-11-25 23:51:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:51:17,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:17,666 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-25 23:51:17,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-25 23:51:17,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:18,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-25 23:51:18,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:18,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:51:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash -396257510, now seen corresponding path program 2 times [2022-11-25 23:51:18,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836649030] [2022-11-25 23:51:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:18,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:18,274 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:51:18,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 23:51:18,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:18,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:51:18,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:18,543 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:18,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:18,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:19,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:19,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836649030] [2022-11-25 23:51:19,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836649030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:19,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848968062] [2022-11-25 23:51:19,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:19,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:51:19,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:51:19,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:51:19,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-25 23:51:19,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:19,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:51:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:19,864 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:19,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:20,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:21,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848968062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495208648] [2022-11-25 23:51:21,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:21,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:21,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:21,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:51:21,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:21,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:51:21,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:21,318 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:21,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:21,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:21,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495208648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:21,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:51:21,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-25 23:51:21,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545929267] [2022-11-25 23:51:21,801 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:21,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:51:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:51:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:51:21,803 INFO L87 Difference]: Start difference. First operand 2828 states and 10926 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:26,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:28,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:29,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:31,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:33,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:35,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:36,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:38,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:40,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:42,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:45,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:48,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:50,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:51,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:53,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:55,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:57,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:59,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:02,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:04,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:07,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:14,763 INFO L93 Difference]: Finished difference Result 22507 states and 87076 transitions. [2022-11-25 23:52:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:52:14,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:52:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:15,133 INFO L225 Difference]: With dead ends: 22507 [2022-11-25 23:52:15,133 INFO L226 Difference]: Without dead ends: 22507 [2022-11-25 23:52:15,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2022-11-25 23:52:15,135 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1410 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 121 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:15,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 164 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2435 Invalid, 14 Unknown, 0 Unchecked, 50.0s Time] [2022-11-25 23:52:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22507 states. [2022-11-25 23:52:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22507 to 2838. [2022-11-25 23:52:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2386 states have (on average 4.592623637887678) internal successors, (10958), 2837 states have internal predecessors, (10958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 10958 transitions. [2022-11-25 23:52:15,620 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 10958 transitions. Word has length 6 [2022-11-25 23:52:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:15,620 INFO L495 AbstractCegarLoop]: Abstraction has 2838 states and 10958 transitions. [2022-11-25 23:52:15,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 10958 transitions. [2022-11-25 23:52:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:15,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:15,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:15,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:15,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:16,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:16,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:16,228 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash 670808880, now seen corresponding path program 1 times [2022-11-25 23:52:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:16,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518619699] [2022-11-25 23:52:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:16,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:16,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:16,231 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:16,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 23:52:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:52:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:16,561 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2022-11-25 23:52:16,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 59 [2022-11-25 23:52:16,733 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-25 23:52:16,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 64 [2022-11-25 23:52:17,218 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-25 23:52:17,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 76 [2022-11-25 23:52:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:17,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:17,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:17,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518619699] [2022-11-25 23:52:17,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518619699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:17,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:17,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:17,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301126948] [2022-11-25 23:52:17,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:17,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:17,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:17,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:17,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:17,851 INFO L87 Difference]: Start difference. First operand 2838 states and 10958 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:18,865 INFO L93 Difference]: Finished difference Result 2837 states and 10952 transitions. [2022-11-25 23:52:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:52:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:52:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:18,883 INFO L225 Difference]: With dead ends: 2837 [2022-11-25 23:52:18,883 INFO L226 Difference]: Without dead ends: 2837 [2022-11-25 23:52:18,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:52:18,885 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:18,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 3 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:52:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2022-11-25 23:52:18,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 2837. [2022-11-25 23:52:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2386 states have (on average 4.59010896898575) internal successors, (10952), 2836 states have internal predecessors, (10952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 10952 transitions. [2022-11-25 23:52:19,012 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 10952 transitions. Word has length 7 [2022-11-25 23:52:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:19,013 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 10952 transitions. [2022-11-25 23:52:19,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 10952 transitions. [2022-11-25 23:52:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:19,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:19,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:19,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:19,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:19,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:19,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 670808832, now seen corresponding path program 1 times [2022-11-25 23:52:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:19,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153449753] [2022-11-25 23:52:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:19,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:19,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:19,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 23:52:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:19,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:52:19,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:19,513 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:52:19,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:52:19,564 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:52:19,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:52:19,602 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:52:19,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:52:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:19,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:19,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:19,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153449753] [2022-11-25 23:52:19,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153449753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:19,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:19,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:52:19,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087647415] [2022-11-25 23:52:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:19,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:52:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:19,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:52:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:52:19,620 INFO L87 Difference]: Start difference. First operand 2837 states and 10952 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) [2022-11-25 23:52:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:20,063 INFO L93 Difference]: Finished difference Result 2304 states and 8898 transitions. [2022-11-25 23:52:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:52:20,065 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 [2022-11-25 23:52:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:20,079 INFO L225 Difference]: With dead ends: 2304 [2022-11-25 23:52:20,080 INFO L226 Difference]: Without dead ends: 2304 [2022-11-25 23:52:20,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:20,081 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 113 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:20,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 4 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:52:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-11-25 23:52:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2022-11-25 23:52:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 1983 states have (on average 4.48714069591528) internal successors, (8898), 2303 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 8898 transitions. [2022-11-25 23:52:20,198 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 8898 transitions. Word has length 7 [2022-11-25 23:52:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:20,199 INFO L495 AbstractCegarLoop]: Abstraction has 2304 states and 8898 transitions. [2022-11-25 23:52:20,199 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) [2022-11-25 23:52:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 8898 transitions. [2022-11-25 23:52:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:20,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:20,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:20,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:20,416 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash 670808881, now seen corresponding path program 1 times [2022-11-25 23:52:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:20,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177246549] [2022-11-25 23:52:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:20,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:20,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:20,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:20,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 23:52:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:52:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:20,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:20,927 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-25 23:52:20,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-25 23:52:20,980 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 23:52:20,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-11-25 23:52:21,163 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-25 23:52:21,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 42 [2022-11-25 23:52:21,441 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-25 23:52:21,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 44 [2022-11-25 23:52:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:21,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:21,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:21,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177246549] [2022-11-25 23:52:21,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177246549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:21,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:21,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:21,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166409886] [2022-11-25 23:52:21,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:21,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:21,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:21,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:21,665 INFO L87 Difference]: Start difference. First operand 2304 states and 8898 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:22,347 INFO L93 Difference]: Finished difference Result 1871 states and 6996 transitions. [2022-11-25 23:52:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:52:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:52:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:22,357 INFO L225 Difference]: With dead ends: 1871 [2022-11-25 23:52:22,358 INFO L226 Difference]: Without dead ends: 1871 [2022-11-25 23:52:22,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:22,359 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:22,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 8 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:52:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2022-11-25 23:52:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1871. [2022-11-25 23:52:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1623 states have (on average 4.310536044362292) internal successors, (6996), 1870 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6996 transitions. [2022-11-25 23:52:22,442 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6996 transitions. Word has length 7 [2022-11-25 23:52:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:22,443 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 6996 transitions. [2022-11-25 23:52:22,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6996 transitions. [2022-11-25 23:52:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:22,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:22,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:22,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:22,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:22,660 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash 670808833, now seen corresponding path program 1 times [2022-11-25 23:52:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:22,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294474057] [2022-11-25 23:52:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:22,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:22,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:22,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:22,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 23:52:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:52:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:22,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:52:22,865 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:52:22,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:52:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:22,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:22,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:22,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294474057] [2022-11-25 23:52:22,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294474057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:22,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:22,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:22,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052644197] [2022-11-25 23:52:22,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:22,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:52:22,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:52:22,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:52:22,888 INFO L87 Difference]: Start difference. First operand 1871 states and 6996 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:23,277 INFO L93 Difference]: Finished difference Result 1490 states and 5566 transitions. [2022-11-25 23:52:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:52:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:52:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:23,284 INFO L225 Difference]: With dead ends: 1490 [2022-11-25 23:52:23,285 INFO L226 Difference]: Without dead ends: 1490 [2022-11-25 23:52:23,285 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 [2022-11-25 23:52:23,287 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:23,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 3 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:52:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-11-25 23:52:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1490. [2022-11-25 23:52:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1323 states have (on average 4.207105064247921) internal successors, (5566), 1489 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5566 transitions. [2022-11-25 23:52:23,354 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5566 transitions. Word has length 7 [2022-11-25 23:52:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:23,354 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 5566 transitions. [2022-11-25 23:52:23,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5566 transitions. [2022-11-25 23:52:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:23,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:23,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:23,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:23,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:23,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash 670808834, now seen corresponding path program 1 times [2022-11-25 23:52:23,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438690420] [2022-11-25 23:52:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:23,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:23,573 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:23,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 23:52:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:52:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:23,949 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:52:23,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:52:24,113 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:52:24,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:52:24,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:24,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:52:24,248 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:52:24,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:52:24,317 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:52:24,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:52:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:24,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:24,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:24,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438690420] [2022-11-25 23:52:24,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438690420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:24,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:24,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30377424] [2022-11-25 23:52:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:24,386 INFO L87 Difference]: Start difference. First operand 1490 states and 5566 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:24,936 INFO L93 Difference]: Finished difference Result 1489 states and 5560 transitions. [2022-11-25 23:52:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:52:24,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:52:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:24,942 INFO L225 Difference]: With dead ends: 1489 [2022-11-25 23:52:24,942 INFO L226 Difference]: Without dead ends: 1489 [2022-11-25 23:52:24,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:24,943 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:24,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 3 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:52:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-11-25 23:52:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1489. [2022-11-25 23:52:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1323 states have (on average 4.202569916855631) internal successors, (5560), 1488 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 5560 transitions. [2022-11-25 23:52:25,009 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 5560 transitions. Word has length 7 [2022-11-25 23:52:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:25,010 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 5560 transitions. [2022-11-25 23:52:25,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 5560 transitions. [2022-11-25 23:52:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:25,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:25,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:25,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:25,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:25,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash 670808835, now seen corresponding path program 1 times [2022-11-25 23:52:25,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:25,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092879674] [2022-11-25 23:52:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:25,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:25,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:25,228 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:25,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 23:52:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:25,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:52:25,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:25,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:52:25,541 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:52:25,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:52:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:25,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:25,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:25,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092879674] [2022-11-25 23:52:25,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092879674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:25,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:25,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:25,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489210790] [2022-11-25 23:52:25,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:25,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:25,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:25,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:25,608 INFO L87 Difference]: Start difference. First operand 1489 states and 5560 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:26,090 INFO L93 Difference]: Finished difference Result 1488 states and 5554 transitions. [2022-11-25 23:52:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:52:26,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:52:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:26,096 INFO L225 Difference]: With dead ends: 1488 [2022-11-25 23:52:26,096 INFO L226 Difference]: Without dead ends: 1488 [2022-11-25 23:52:26,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:26,097 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 149 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:26,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 3 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:52:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-11-25 23:52:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1488. [2022-11-25 23:52:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1323 states have (on average 4.198034769463341) internal successors, (5554), 1487 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 5554 transitions. [2022-11-25 23:52:26,161 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 5554 transitions. Word has length 7 [2022-11-25 23:52:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:26,162 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 5554 transitions. [2022-11-25 23:52:26,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 5554 transitions. [2022-11-25 23:52:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:52:26,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:26,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:26,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:26,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:26,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 402273356, now seen corresponding path program 1 times [2022-11-25 23:52:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:26,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617515650] [2022-11-25 23:52:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:26,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:26,381 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:26,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 23:52:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:52:26,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:26,767 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-25 23:52:26,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-25 23:52:26,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 23:52:26,889 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 23:52:26,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-25 23:52:27,096 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-25 23:52:27,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 45 [2022-11-25 23:52:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:27,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:27,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617515650] [2022-11-25 23:52:27,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617515650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:27,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:27,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:52:27,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007128346] [2022-11-25 23:52:27,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:27,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:52:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:52:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:27,739 INFO L87 Difference]: Start difference. First operand 1488 states and 5554 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:29,163 INFO L93 Difference]: Finished difference Result 1438 states and 5403 transitions. [2022-11-25 23:52:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:52:29,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:52:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:29,169 INFO L225 Difference]: With dead ends: 1438 [2022-11-25 23:52:29,169 INFO L226 Difference]: Without dead ends: 1438 [2022-11-25 23:52:29,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:52:29,170 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 97 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:29,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 9 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:52:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-11-25 23:52:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1438. [2022-11-25 23:52:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1291 states have (on average 4.1851278079008525) internal successors, (5403), 1437 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 5403 transitions. [2022-11-25 23:52:29,211 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 5403 transitions. Word has length 9 [2022-11-25 23:52:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:29,211 INFO L495 AbstractCegarLoop]: Abstraction has 1438 states and 5403 transitions. [2022-11-25 23:52:29,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 5403 transitions. [2022-11-25 23:52:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:52:29,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:29,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:29,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:29,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:29,414 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash 402273357, now seen corresponding path program 1 times [2022-11-25 23:52:29,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628119214] [2022-11-25 23:52:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:29,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:29,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:29,416 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:29,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 23:52:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:52:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:29,828 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-25 23:52:29,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-25 23:52:30,067 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-25 23:52:30,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-25 23:52:30,532 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-25 23:52:30,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 84 [2022-11-25 23:52:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:31,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:31,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:31,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628119214] [2022-11-25 23:52:31,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628119214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:31,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:31,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:52:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552972851] [2022-11-25 23:52:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:52:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:52:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:31,275 INFO L87 Difference]: Start difference. First operand 1438 states and 5403 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:31,620 INFO L93 Difference]: Finished difference Result 1388 states and 5252 transitions. [2022-11-25 23:52:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:31,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:52:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:31,626 INFO L225 Difference]: With dead ends: 1388 [2022-11-25 23:52:31,627 INFO L226 Difference]: Without dead ends: 1388 [2022-11-25 23:52:31,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:31,628 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 136 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:31,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 4 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:52:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-11-25 23:52:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1388. [2022-11-25 23:52:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1259 states have (on average 4.171564733915806) internal successors, (5252), 1387 states have internal predecessors, (5252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5252 transitions. [2022-11-25 23:52:31,672 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5252 transitions. Word has length 9 [2022-11-25 23:52:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:31,673 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 5252 transitions. [2022-11-25 23:52:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5252 transitions. [2022-11-25 23:52:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:52:31,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:31,674 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-25 23:52:31,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:31,890 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:52:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1098014314, now seen corresponding path program 1 times [2022-11-25 23:52:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:31,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621645012] [2022-11-25 23:52:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:31,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:31,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:31,892 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:52:31,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 23:52:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:52:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:32,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:52:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:32,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:33,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:33,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621645012] [2022-11-25 23:52:33,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621645012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:33,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874667070] [2022-11-25 23:52:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:33,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:33,849 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:33,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-25 23:52:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:52:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:52:34,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:52:34,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874667070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:34,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438641787] [2022-11-25 23:52:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:34,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:34,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:34,917 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:34,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:52:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:52:35,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:52:35,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:52:35,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438641787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:35,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:52:35,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 5, 5, 5, 5] total 25 [2022-11-25 23:52:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141689634] [2022-11-25 23:52:35,355 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:52:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:52:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:52:35,356 INFO L87 Difference]: Start difference. First operand 1388 states and 5252 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:42,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:44,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:48,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:50,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:53:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:11,387 INFO L93 Difference]: Finished difference Result 13637 states and 52091 transitions. [2022-11-25 23:53:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 23:53:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:53:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:11,444 INFO L225 Difference]: With dead ends: 13637 [2022-11-25 23:53:11,444 INFO L226 Difference]: Without dead ends: 13637 [2022-11-25 23:53:11,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:53:11,446 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1454 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 3577 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 3687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:11,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1454 Valid, 243 Invalid, 3687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3577 Invalid, 0 Unknown, 0 Unchecked, 32.5s Time] [2022-11-25 23:53:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13637 states. [2022-11-25 23:53:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13637 to 1399. [2022-11-25 23:53:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1270 states have (on average 4.148031496062992) internal successors, (5268), 1398 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 5268 transitions. [2022-11-25 23:53:11,626 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 5268 transitions. Word has length 10 [2022-11-25 23:53:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:11,627 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 5268 transitions. [2022-11-25 23:53:11,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 5268 transitions. [2022-11-25 23:53:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:53:11,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:11,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:11,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:11,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:12,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:12,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:12,237 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:53:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash -414437614, now seen corresponding path program 1 times [2022-11-25 23:53:12,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:12,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801319841] [2022-11-25 23:53:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:12,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:12,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:12,240 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:53:12,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 23:53:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:53:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:53:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:53:12,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:12,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801319841] [2022-11-25 23:53:12,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801319841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:12,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1370678121] [2022-11-25 23:53:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:12,614 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:53:12,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:53:12,615 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:53:12,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-25 23:53:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:12,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:53:12,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:53:13,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:53:13,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1370678121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:13,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598799471] [2022-11-25 23:53:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:13,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:13,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:13,115 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:13,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 23:53:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:13,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:53:13,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:53:13,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:53:13,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598799471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:13,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:53:13,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2022-11-25 23:53:13,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147422233] [2022-11-25 23:53:13,454 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:13,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:53:13,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:13,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:53:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:53:13,455 INFO L87 Difference]: Start difference. First operand 1399 states and 5268 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:16,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:16,127 INFO L93 Difference]: Finished difference Result 1979 states and 7148 transitions. [2022-11-25 23:53:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:53:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:53:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:16,135 INFO L225 Difference]: With dead ends: 1979 [2022-11-25 23:53:16,135 INFO L226 Difference]: Without dead ends: 1979 [2022-11-25 23:53:16,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:53:16,136 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 272 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:16,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 52 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 23:53:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-25 23:53:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1713. [2022-11-25 23:53:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1584 states have (on average 4.048611111111111) internal successors, (6413), 1712 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 6413 transitions. [2022-11-25 23:53:16,190 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 6413 transitions. Word has length 10 [2022-11-25 23:53:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:16,190 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 6413 transitions. [2022-11-25 23:53:16,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 6413 transitions. [2022-11-25 23:53:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:53:16,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:16,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:16,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:16,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:16,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:16,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:16,796 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:53:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 37672514, now seen corresponding path program 1 times [2022-11-25 23:53:16,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:16,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083125498] [2022-11-25 23:53:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:16,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:16,798 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:53:16,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 23:53:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:53:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:17,194 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 23:53:17,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 23:53:17,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 23:53:17,274 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 23:53:17,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:53:17,438 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-25 23:53:17,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 42 [2022-11-25 23:53:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:53:17,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:53:17,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083125498] [2022-11-25 23:53:17,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083125498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:53:17,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:53:17,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:53:17,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78258490] [2022-11-25 23:53:17,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:53:17,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:53:17,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:53:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:53:17,706 INFO L87 Difference]: Start difference. First operand 1713 states and 6413 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:18,401 INFO L93 Difference]: Finished difference Result 1637 states and 6176 transitions. [2022-11-25 23:53:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:53:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:53:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:18,407 INFO L225 Difference]: With dead ends: 1637 [2022-11-25 23:53:18,407 INFO L226 Difference]: Without dead ends: 1637 [2022-11-25 23:53:18,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:53:18,408 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:18,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 9 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:53:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2022-11-25 23:53:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1637. [2022-11-25 23:53:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1526 states have (on average 4.047182175622543) internal successors, (6176), 1636 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 6176 transitions. [2022-11-25 23:53:18,471 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 6176 transitions. Word has length 11 [2022-11-25 23:53:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:18,471 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 6176 transitions. [2022-11-25 23:53:18,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 6176 transitions. [2022-11-25 23:53:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:53:18,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:18,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:18,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:18,687 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:53:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash 37672515, now seen corresponding path program 1 times [2022-11-25 23:53:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:18,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330155666] [2022-11-25 23:53:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:18,689 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:53:18,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-25 23:53:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:53:18,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:19,014 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-25 23:53:19,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-25 23:53:19,056 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:53:19,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-25 23:53:19,105 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:53:19,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-25 23:53:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:53:19,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:53:19,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:19,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330155666] [2022-11-25 23:53:19,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330155666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:53:19,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:53:19,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:53:19,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657195380] [2022-11-25 23:53:19,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:53:19,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:53:19,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:53:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:53:19,205 INFO L87 Difference]: Start difference. First operand 1637 states and 6176 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:19,534 INFO L93 Difference]: Finished difference Result 1561 states and 5939 transitions. [2022-11-25 23:53:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:53:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:53:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:19,540 INFO L225 Difference]: With dead ends: 1561 [2022-11-25 23:53:19,540 INFO L226 Difference]: Without dead ends: 1561 [2022-11-25 23:53:19,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:53:19,541 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 118 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:19,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:53:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2022-11-25 23:53:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1561. [2022-11-25 23:53:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1468 states have (on average 4.045640326975477) internal successors, (5939), 1560 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5939 transitions. [2022-11-25 23:53:19,577 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5939 transitions. Word has length 11 [2022-11-25 23:53:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:19,578 INFO L495 AbstractCegarLoop]: Abstraction has 1561 states and 5939 transitions. [2022-11-25 23:53:19,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5939 transitions. [2022-11-25 23:53:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:53:19,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:19,579 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-25 23:53:19,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-25 23:53:19,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:53:19,793 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:53:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1122946694, now seen corresponding path program 3 times [2022-11-25 23:53:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102806728] [2022-11-25 23:53:19,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:53:19,794 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 [2022-11-25 23:53:19,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:19,795 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:53:19,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-25 23:53:20,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:53:20,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:53:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:53:20,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:20,174 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:53:20,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:53:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:20,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:23,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:23,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102806728] [2022-11-25 23:53:23,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102806728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:23,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1897862280] [2022-11-25 23:53:23,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:53:23,923 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:53:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:53:23,924 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:53:23,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-25 23:53:24,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:53:24,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:53:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:53:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:25,039 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:53:25,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:53:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:25,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:25,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1897862280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:25,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168367428] [2022-11-25 23:53:25,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:53:25,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:25,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:25,740 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:25,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 23:53:28,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:53:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:53:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:53:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:29,118 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:53:29,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:53:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:30,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168367428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:30,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:53:30,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-25 23:53:30,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733087898] [2022-11-25 23:53:30,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 23:53:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 23:53:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:53:30,498 INFO L87 Difference]: Start difference. First operand 1561 states and 5939 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:50,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:53:52,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:53:54,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:53:56,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:53:58,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:00,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:02,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:04,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:06,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:08,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:16,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:18,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:20,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:22,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:24,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:26,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:28,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:30,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:32,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:34,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:54:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:43,646 INFO L93 Difference]: Finished difference Result 14181 states and 54790 transitions. [2022-11-25 23:54:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 23:54:43,649 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2022-11-25 23:54:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:43,720 INFO L225 Difference]: With dead ends: 14181 [2022-11-25 23:54:43,721 INFO L226 Difference]: Without dead ends: 14181 [2022-11-25 23:54:43,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:54:43,722 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2375 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 5875 mSolverCounterSat, 310 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 6205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 5875 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:43,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2375 Valid, 441 Invalid, 6205 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [310 Valid, 5875 Invalid, 20 Unknown, 0 Unchecked, 57.1s Time] [2022-11-25 23:54:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14181 states. [2022-11-25 23:54:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14181 to 1577. [2022-11-25 23:54:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1484 states have (on average 4.024932614555256) internal successors, (5973), 1576 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5973 transitions. [2022-11-25 23:54:44,008 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5973 transitions. Word has length 12 [2022-11-25 23:54:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:44,011 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 5973 transitions. [2022-11-25 23:54:44,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5973 transitions. [2022-11-25 23:54:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:54:44,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:44,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:44,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:44,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:44,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:44,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:44,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:54:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1167838490, now seen corresponding path program 1 times [2022-11-25 23:54:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300032238] [2022-11-25 23:54:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:44,624 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:44,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-25 23:54:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:54:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:44,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:45,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300032238] [2022-11-25 23:54:45,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300032238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380363669] [2022-11-25 23:54:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:45,091 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:45,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:45,092 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:45,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-25 23:54:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:45,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:54:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:45,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:45,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380363669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88654415] [2022-11-25 23:54:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:45,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:45,645 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:45,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 23:54:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:54:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:46,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:46,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88654415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:46,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:46,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2022-11-25 23:54:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596542544] [2022-11-25 23:54:46,065 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:46,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:54:46,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:54:46,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:54:46,066 INFO L87 Difference]: Start difference. First operand 1577 states and 5973 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:48,046 INFO L93 Difference]: Finished difference Result 1529 states and 5610 transitions. [2022-11-25 23:54:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:54:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:54:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:48,052 INFO L225 Difference]: With dead ends: 1529 [2022-11-25 23:54:48,052 INFO L226 Difference]: Without dead ends: 1529 [2022-11-25 23:54:48,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:54:48,053 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 193 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:48,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 31 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 23:54:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-11-25 23:54:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1483. [2022-11-25 23:54:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1390 states have (on average 3.9719424460431654) internal successors, (5521), 1482 states have internal predecessors, (5521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 5521 transitions. [2022-11-25 23:54:48,093 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 5521 transitions. Word has length 12 [2022-11-25 23:54:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:48,093 INFO L495 AbstractCegarLoop]: Abstraction has 1483 states and 5521 transitions. [2022-11-25 23:54:48,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 5521 transitions. [2022-11-25 23:54:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:54:48,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:48,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:48,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:48,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-25 23:54:48,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:48,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:48,708 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:54:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash -447324957, now seen corresponding path program 2 times [2022-11-25 23:54:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:48,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996743339] [2022-11-25 23:54:48,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:54:48,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:48,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:48,710 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:48,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-25 23:54:48,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 23:54:48,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:48,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:54:48,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:49,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:54:49,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:54:49,313 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:54:49,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:54:49,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:49,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:54:49,465 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:54:49,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:54:49,555 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:54:49,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:54:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:54:49,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:49,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996743339] [2022-11-25 23:54:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996743339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:49,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:49,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:54:49,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499147324] [2022-11-25 23:54:49,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:49,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:54:49,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:54:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:54:49,688 INFO L87 Difference]: Start difference. First operand 1483 states and 5521 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:50,401 INFO L93 Difference]: Finished difference Result 2433 states and 9273 transitions. [2022-11-25 23:54:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:54:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:54:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:50,410 INFO L225 Difference]: With dead ends: 2433 [2022-11-25 23:54:50,410 INFO L226 Difference]: Without dead ends: 2433 [2022-11-25 23:54:50,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:54:50,411 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 140 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:50,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 7 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:54:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-11-25 23:54:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1625. [2022-11-25 23:54:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1532 states have (on average 4.134464751958225) internal successors, (6334), 1624 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 6334 transitions. [2022-11-25 23:54:50,450 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 6334 transitions. Word has length 13 [2022-11-25 23:54:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:50,450 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 6334 transitions. [2022-11-25 23:54:50,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 6334 transitions. [2022-11-25 23:54:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:54:50,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:50,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:50,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:50,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:50,652 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:54:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1843581693, now seen corresponding path program 1 times [2022-11-25 23:54:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:50,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241852690] [2022-11-25 23:54:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:50,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:50,654 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:50,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-25 23:54:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:50,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:54:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:54:50,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:50,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:50,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241852690] [2022-11-25 23:54:50,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241852690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:50,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:50,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:54:50,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015343062] [2022-11-25 23:54:50,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:50,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:54:50,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:50,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:54:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:54:50,877 INFO L87 Difference]: Start difference. First operand 1625 states and 6334 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:51,187 INFO L93 Difference]: Finished difference Result 1199 states and 4415 transitions. [2022-11-25 23:54:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:51,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:54:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:51,191 INFO L225 Difference]: With dead ends: 1199 [2022-11-25 23:54:51,191 INFO L226 Difference]: Without dead ends: 1199 [2022-11-25 23:54:51,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:54:51,192 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:51,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 4 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:54:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-11-25 23:54:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2022-11-25 23:54:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1151 states have (on average 3.835794960903562) internal successors, (4415), 1198 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4415 transitions. [2022-11-25 23:54:51,218 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4415 transitions. Word has length 13 [2022-11-25 23:54:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:51,219 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 4415 transitions. [2022-11-25 23:54:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4415 transitions. [2022-11-25 23:54:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:54:51,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:51,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:51,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:51,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:51,430 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:54:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash -982164820, now seen corresponding path program 1 times [2022-11-25 23:54:51,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:51,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551375304] [2022-11-25 23:54:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:51,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:51,432 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-25 23:54:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:51,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:54:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:54:51,885 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:54:51,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-11-25 23:54:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:54:52,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:54:52,911 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:52,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551375304] [2022-11-25 23:54:52,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551375304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:52,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [168293462] [2022-11-25 23:54:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:52,912 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:52,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:52,915 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:52,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-25 23:54:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:53,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:54:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:53,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:54:53,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:54:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:54,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:54:54,167 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:54:54,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:54:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:54:54,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:55,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:54:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:54:55,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [168293462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:55,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846376735] [2022-11-25 23:54:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:55,864 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:55,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 23:54:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:54:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:56,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:54:56,363 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:54:56,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:54:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:54:56,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:54:59,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846376735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:59,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:59,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 7, 7] total 31 [2022-11-25 23:54:59,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818806142] [2022-11-25 23:54:59,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:59,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 23:54:59,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 23:54:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:54:59,285 INFO L87 Difference]: Start difference. First operand 1199 states and 4415 transitions. Second operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:21,328 INFO L93 Difference]: Finished difference Result 2844 states and 10500 transitions. [2022-11-25 23:55:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 23:55:21,330 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:55:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:21,337 INFO L225 Difference]: With dead ends: 2844 [2022-11-25 23:55:21,337 INFO L226 Difference]: Without dead ends: 2844 [2022-11-25 23:55:21,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=670, Invalid=2522, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 23:55:21,338 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1151 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:21,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 100 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-25 23:55:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2022-11-25 23:55:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 1405. [2022-11-25 23:55:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1357 states have (on average 3.778187177597642) internal successors, (5127), 1404 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5127 transitions. [2022-11-25 23:55:21,373 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5127 transitions. Word has length 14 [2022-11-25 23:55:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:21,373 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 5127 transitions. [2022-11-25 23:55:21,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5127 transitions. [2022-11-25 23:55:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:55:21,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:21,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:21,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:21,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:21,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:21,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:21,979 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:55:21,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:21,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1316450491, now seen corresponding path program 1 times [2022-11-25 23:55:21,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:21,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493792769] [2022-11-25 23:55:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:21,981 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 [2022-11-25 23:55:21,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:21,982 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:55:21,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-25 23:55:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:22,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:22,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:22,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:55:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:55:22,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:22,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:22,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493792769] [2022-11-25 23:55:22,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493792769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:22,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:22,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:55:22,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836465886] [2022-11-25 23:55:22,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:22,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:55:22,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:55:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:55:22,235 INFO L87 Difference]: Start difference. First operand 1405 states and 5127 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2022-11-25 23:55:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:22,567 INFO L93 Difference]: Finished difference Result 1073 states and 3873 transitions. [2022-11-25 23:55:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:55:22,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 [2022-11-25 23:55:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:22,584 INFO L225 Difference]: With dead ends: 1073 [2022-11-25 23:55:22,584 INFO L226 Difference]: Without dead ends: 1073 [2022-11-25 23:55:22,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:55:22,585 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:22,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 4 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:55:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-11-25 23:55:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1073. [2022-11-25 23:55:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1046 states have (on average 3.702676864244742) internal successors, (3873), 1072 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3873 transitions. [2022-11-25 23:55:22,602 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3873 transitions. Word has length 14 [2022-11-25 23:55:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:22,603 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 3873 transitions. [2022-11-25 23:55:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2022-11-25 23:55:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3873 transitions. [2022-11-25 23:55:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:55:22,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:22,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:22,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:22,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:22,805 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:55:22,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1316450493, now seen corresponding path program 1 times [2022-11-25 23:55:22,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:22,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913212009] [2022-11-25 23:55:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:22,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:22,807 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:55:22,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-25 23:55:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:55:23,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:23,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:55:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:55:23,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:23,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:23,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913212009] [2022-11-25 23:55:23,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913212009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:23,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:23,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:55:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555112441] [2022-11-25 23:55:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:23,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:55:23,255 INFO L87 Difference]: Start difference. First operand 1073 states and 3873 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-25 23:55:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:23,885 INFO L93 Difference]: Finished difference Result 1573 states and 5871 transitions. [2022-11-25 23:55:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:55:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2022-11-25 23:55:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:23,891 INFO L225 Difference]: With dead ends: 1573 [2022-11-25 23:55:23,891 INFO L226 Difference]: Without dead ends: 1573 [2022-11-25 23:55:23,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:55:23,892 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:23,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 7 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:55:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-11-25 23:55:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1239. [2022-11-25 23:55:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1212 states have (on average 3.972772277227723) internal successors, (4815), 1238 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 4815 transitions. [2022-11-25 23:55:23,915 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 4815 transitions. Word has length 14 [2022-11-25 23:55:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:23,915 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 4815 transitions. [2022-11-25 23:55:23,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-25 23:55:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 4815 transitions. [2022-11-25 23:55:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:55:23,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:23,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:23,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:24,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:24,118 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:55:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash -372127061, now seen corresponding path program 2 times [2022-11-25 23:55:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:24,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490929250] [2022-11-25 23:55:24,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:55:24,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:24,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:24,120 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:55:24,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-25 23:55:24,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 23:55:24,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:55:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:55:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:24,500 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:55:24,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:55:24,658 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:55:24,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:55:24,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:55:24,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:55:24,782 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:55:24,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:55:24,865 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:55:24,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:55:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:55:25,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:25,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:25,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490929250] [2022-11-25 23:55:25,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490929250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:25,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:25,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:55:25,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24016162] [2022-11-25 23:55:25,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:55:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:25,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:55:25,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:55:25,012 INFO L87 Difference]: Start difference. First operand 1239 states and 4815 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:25,648 INFO L93 Difference]: Finished difference Result 1917 states and 7615 transitions. [2022-11-25 23:55:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:55:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:55:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:25,655 INFO L225 Difference]: With dead ends: 1917 [2022-11-25 23:55:25,656 INFO L226 Difference]: Without dead ends: 1917 [2022-11-25 23:55:25,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:55:25,656 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:25,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 7 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:55:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-11-25 23:55:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1405. [2022-11-25 23:55:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1378 states have (on average 4.357764876632801) internal successors, (6005), 1404 states have internal predecessors, (6005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 6005 transitions. [2022-11-25 23:55:25,702 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 6005 transitions. Word has length 15 [2022-11-25 23:55:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:25,703 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 6005 transitions. [2022-11-25 23:55:25,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 6005 transitions. [2022-11-25 23:55:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:55:25,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:25,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:25,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:25,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:25,905 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:55:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -372127059, now seen corresponding path program 1 times [2022-11-25 23:55:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:25,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727752194] [2022-11-25 23:55:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:25,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:25,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:25,908 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:55:25,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-25 23:55:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:55:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:26,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:55:26,394 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:55:26,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-25 23:55:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:55:26,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:55:27,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727752194] [2022-11-25 23:55:27,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727752194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830903569] [2022-11-25 23:55:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:27,427 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:27,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-25 23:55:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:55:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:28,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:55:28,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:55:28,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:55:28,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:55:28,718 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:55:28,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:55:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:55:29,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:29,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:55:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:55:30,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830903569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497357054] [2022-11-25 23:55:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:30,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:30,343 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:30,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 23:55:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:30,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:55:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:30,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:55:30,866 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:55:30,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:55:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:55:31,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:55:34,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497357054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:34,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:55:34,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 7, 7] total 31 [2022-11-25 23:55:34,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812871194] [2022-11-25 23:55:34,865 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:34,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 23:55:34,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 23:55:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=860, Unknown=1, NotChecked=0, Total=992 [2022-11-25 23:55:34,867 INFO L87 Difference]: Start difference. First operand 1405 states and 6005 transitions. Second operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:04,287 INFO L93 Difference]: Finished difference Result 2976 states and 11908 transitions. [2022-11-25 23:56:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 23:56:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:56:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:04,298 INFO L225 Difference]: With dead ends: 2976 [2022-11-25 23:56:04,298 INFO L226 Difference]: Without dead ends: 2976 [2022-11-25 23:56:04,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=670, Invalid=2521, Unknown=1, NotChecked=0, Total=3192 [2022-11-25 23:56:04,299 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1124 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:04,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 93 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-25 23:56:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2022-11-25 23:56:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 1405. [2022-11-25 23:56:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1378 states have (on average 4.116835994194485) internal successors, (5673), 1404 states have internal predecessors, (5673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5673 transitions. [2022-11-25 23:56:04,369 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5673 transitions. Word has length 15 [2022-11-25 23:56:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:04,370 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 5673 transitions. [2022-11-25 23:56:04,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5673 transitions. [2022-11-25 23:56:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:56:04,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:04,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:04,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:04,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:04,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:04,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:04,982 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:56:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -372127057, now seen corresponding path program 1 times [2022-11-25 23:56:04,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:04,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40772444] [2022-11-25 23:56:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:04,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:04,984 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:04,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-25 23:56:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:56:05,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:05,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:05,652 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 27 treesize of output 23 [2022-11-25 23:56:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:05,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40772444] [2022-11-25 23:56:05,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40772444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1831578162] [2022-11-25 23:56:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:05,884 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:05,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:05,887 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:05,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-25 23:56:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:06,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:56:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:06,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:56:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:06,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:07,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1831578162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:07,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963446747] [2022-11-25 23:56:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:07,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:07,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:07,471 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:07,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 23:56:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:56:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:07,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-25 23:56:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:07,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:08,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963446747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:08,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:56:08,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 24 [2022-11-25 23:56:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274113689] [2022-11-25 23:56:08,410 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:08,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:56:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:56:08,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:56:08,412 INFO L87 Difference]: Start difference. First operand 1405 states and 5673 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:17,113 INFO L93 Difference]: Finished difference Result 7468 states and 30290 transitions. [2022-11-25 23:56:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 23:56:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:56:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:17,136 INFO L225 Difference]: With dead ends: 7468 [2022-11-25 23:56:17,136 INFO L226 Difference]: Without dead ends: 7468 [2022-11-25 23:56:17,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=614, Invalid=2142, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 23:56:17,137 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1737 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:17,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 96 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-25 23:56:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2022-11-25 23:56:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 1405. [2022-11-25 23:56:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1378 states have (on average 3.9963715529753268) internal successors, (5507), 1404 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5507 transitions. [2022-11-25 23:56:17,206 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5507 transitions. Word has length 15 [2022-11-25 23:56:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:17,206 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 5507 transitions. [2022-11-25 23:56:17,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5507 transitions. [2022-11-25 23:56:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:56:17,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:17,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:17,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-25 23:56:17,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:17,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:17,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:17,822 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:56:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash -382324674, now seen corresponding path program 1 times [2022-11-25 23:56:17,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532312235] [2022-11-25 23:56:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:17,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:17,824 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:17,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-25 23:56:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:56:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:18,218 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:56:18,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:56:18,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:56:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:18,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:18,861 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532312235] [2022-11-25 23:56:18,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532312235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912846961] [2022-11-25 23:56:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:18,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:18,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:18,862 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:18,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-25 23:56:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:56:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:19,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1912846961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:19,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202493089] [2022-11-25 23:56:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:19,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:19,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:19,748 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:19,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-25 23:56:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:56:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:20,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:20,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202493089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:20,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:56:20,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 22 [2022-11-25 23:56:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524130] [2022-11-25 23:56:20,392 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:20,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:56:20,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:56:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:56:20,393 INFO L87 Difference]: Start difference. First operand 1405 states and 5507 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:25,700 INFO L93 Difference]: Finished difference Result 2244 states and 8696 transitions. [2022-11-25 23:56:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:56:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:56:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:25,708 INFO L225 Difference]: With dead ends: 2244 [2022-11-25 23:56:25,708 INFO L226 Difference]: Without dead ends: 2244 [2022-11-25 23:56:25,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:56:25,709 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 568 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:25,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 104 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-25 23:56:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-11-25 23:56:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1992. [2022-11-25 23:56:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1965 states have (on average 4.0508905852417305) internal successors, (7960), 1991 states have internal predecessors, (7960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 7960 transitions. [2022-11-25 23:56:25,748 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 7960 transitions. Word has length 15 [2022-11-25 23:56:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:25,748 INFO L495 AbstractCegarLoop]: Abstraction has 1992 states and 7960 transitions. [2022-11-25 23:56:25,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 7960 transitions. [2022-11-25 23:56:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:56:25,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:25,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:25,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:25,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:26,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-25 23:56:26,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:26,355 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:56:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1348968123, now seen corresponding path program 1 times [2022-11-25 23:56:26,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:26,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024027940] [2022-11-25 23:56:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:26,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:26,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:26,358 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:26,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-25 23:56:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:26,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:56:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:26,792 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:56:26,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:56:26,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:56:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:27,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:27,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024027940] [2022-11-25 23:56:27,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024027940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2084285664] [2022-11-25 23:56:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:27,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:27,451 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:27,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-25 23:56:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:28,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:56:28,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:28,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:28,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2084285664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:28,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121620444] [2022-11-25 23:56:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:28,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:28,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:28,490 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:28,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-25 23:56:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:28,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:56:28,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:29,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:29,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121620444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:29,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:56:29,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 22 [2022-11-25 23:56:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782448092] [2022-11-25 23:56:29,149 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:56:29,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:56:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:56:29,151 INFO L87 Difference]: Start difference. First operand 1992 states and 7960 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:34,215 INFO L93 Difference]: Finished difference Result 1914 states and 7284 transitions. [2022-11-25 23:56:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:56:34,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 23:56:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:34,221 INFO L225 Difference]: With dead ends: 1914 [2022-11-25 23:56:34,221 INFO L226 Difference]: Without dead ends: 1914 [2022-11-25 23:56:34,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:56:34,222 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 422 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:34,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 133 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 23:56:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2022-11-25 23:56:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1780. [2022-11-25 23:56:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1753 states have (on average 3.9543639475185395) internal successors, (6932), 1779 states have internal predecessors, (6932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 6932 transitions. [2022-11-25 23:56:34,252 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 6932 transitions. Word has length 16 [2022-11-25 23:56:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:34,253 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 6932 transitions. [2022-11-25 23:56:34,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 6932 transitions. [2022-11-25 23:56:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:56:34,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:34,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:34,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-25 23:56:34,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:34,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:34,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:34,859 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:56:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:34,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1906586597, now seen corresponding path program 1 times [2022-11-25 23:56:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602541285] [2022-11-25 23:56:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:34,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:34,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:34,861 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:34,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-25 23:56:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:56:35,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:56:35,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:35,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602541285] [2022-11-25 23:56:35,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602541285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:35,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:35,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:56:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027226262] [2022-11-25 23:56:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:35,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:56:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:35,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:56:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:56:35,147 INFO L87 Difference]: Start difference. First operand 1780 states and 6932 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:36,208 INFO L93 Difference]: Finished difference Result 2478 states and 9638 transitions. [2022-11-25 23:56:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:56:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 23:56:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:36,220 INFO L225 Difference]: With dead ends: 2478 [2022-11-25 23:56:36,220 INFO L226 Difference]: Without dead ends: 2386 [2022-11-25 23:56:36,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:56:36,221 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:36,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 27 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:56:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2022-11-25 23:56:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1704. [2022-11-25 23:56:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1666 states have (on average 3.7593037214885956) internal successors, (6263), 1703 states have internal predecessors, (6263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 6263 transitions. [2022-11-25 23:56:36,263 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 6263 transitions. Word has length 16 [2022-11-25 23:56:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:36,263 INFO L495 AbstractCegarLoop]: Abstraction has 1704 states and 6263 transitions. [2022-11-25 23:56:36,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 6263 transitions. [2022-11-25 23:56:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:56:36,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:36,264 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 1, 1, 1] [2022-11-25 23:56:36,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:36,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:36,465 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:56:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1774753994, now seen corresponding path program 2 times [2022-11-25 23:56:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:36,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479274766] [2022-11-25 23:56:36,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:56:36,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:56:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:36,467 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:56:36,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-25 23:56:36,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:56:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:56:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:56:36,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:36,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:56:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:56:37,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:41,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479274766] [2022-11-25 23:56:41,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479274766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012212858] [2022-11-25 23:56:41,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:56:41,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:41,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:41,192 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:41,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-25 23:56:41,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:56:41,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:56:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:56:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:41,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:56:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:56:41,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:56:43,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2012212858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:43,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287251019] [2022-11-25 23:56:43,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:56:43,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:43,698 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:43,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-25 23:56:44,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:56:44,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:56:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:56:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:56:44,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:56:46,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287251019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:46,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:56:46,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 9, 9, 9, 9] total 51 [2022-11-25 23:56:46,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957770281] [2022-11-25 23:56:46,419 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:46,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 23:56:46,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 23:56:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2378, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:56:46,421 INFO L87 Difference]: Start difference. First operand 1704 states and 6263 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:34,055 INFO L93 Difference]: Finished difference Result 6151 states and 23068 transitions. [2022-11-25 23:57:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 23:57:34,057 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 23:57:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:34,076 INFO L225 Difference]: With dead ends: 6151 [2022-11-25 23:57:34,076 INFO L226 Difference]: Without dead ends: 6151 [2022-11-25 23:57:34,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=1059, Invalid=5103, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 23:57:34,079 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2642 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 3256 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2642 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 3758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 3256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:34,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2642 Valid, 264 Invalid, 3758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 3256 Invalid, 0 Unknown, 0 Unchecked, 32.2s Time] [2022-11-25 23:57:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-11-25 23:57:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 1720. [2022-11-25 23:57:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1682 states have (on average 3.735434007134364) internal successors, (6283), 1719 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 6283 transitions. [2022-11-25 23:57:34,188 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 6283 transitions. Word has length 18 [2022-11-25 23:57:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:34,188 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 6283 transitions. [2022-11-25 23:57:34,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 6283 transitions. [2022-11-25 23:57:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:57:34,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:34,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:34,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:34,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:34,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:34,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:57:34,801 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:57:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 742216269, now seen corresponding path program 2 times [2022-11-25 23:57:34,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:57:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216619512] [2022-11-25 23:57:34,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:57:34,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:57:34,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:57:34,803 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:57:34,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-25 23:57:35,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:57:35,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:35,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:57:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:35,351 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:57:35,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:57:35,504 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:57:35,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:57:35,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:35,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:57:35,652 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:57:35,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:57:35,734 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:57:35,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:57:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:57:35,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:57:38,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:57:38,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216619512] [2022-11-25 23:57:38,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216619512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768475432] [2022-11-25 23:57:38,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:57:38,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:57:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:57:38,850 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:57:38,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-25 23:57:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:57:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:57:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:39,733 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:57:39,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:57:39,893 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:57:39,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:57:40,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:40,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:57:40,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:57:40,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:57:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:40,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:40,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:57:40,563 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-25 23:57:40,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 23:57:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:57:41,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:57:45,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768475432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273270473] [2022-11-25 23:57:45,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:57:45,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:45,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:45,006 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:45,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-25 23:57:45,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:57:45,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:57:45,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:45,564 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:57:45,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:57:45,717 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:57:45,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:57:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:46,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:57:46,273 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:57:46,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:57:46,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:46,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:57:46,461 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:57:46,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:57:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:57:47,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:59,874 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:58:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273270473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:58:03,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:58:03,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8, 8, 8, 9] total 39 [2022-11-25 23:58:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795026572] [2022-11-25 23:58:03,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 23:58:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:58:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 23:58:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1432, Unknown=1, NotChecked=0, Total=1640 [2022-11-25 23:58:03,484 INFO L87 Difference]: Start difference. First operand 1720 states and 6283 transitions. Second operand has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:58:10,800 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 72 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:18,136 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 67 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:49,775 INFO L93 Difference]: Finished difference Result 9054 states and 34752 transitions. [2022-11-25 23:58:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 23:58:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2022-11-25 23:58:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:49,820 INFO L225 Difference]: With dead ends: 9054 [2022-11-25 23:58:49,821 INFO L226 Difference]: Without dead ends: 9054 [2022-11-25 23:58:49,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=1844, Invalid=7275, Unknown=1, NotChecked=0, Total=9120 [2022-11-25 23:58:49,823 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4043 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4043 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:49,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4043 Valid, 276 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-11-25 23:58:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9054 states. [2022-11-25 23:58:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9054 to 2737. [2022-11-25 23:58:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2699 states have (on average 4.024082993701371) internal successors, (10861), 2736 states have internal predecessors, (10861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:58:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 10861 transitions. [2022-11-25 23:58:49,946 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 10861 transitions. Word has length 18 [2022-11-25 23:58:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:49,946 INFO L495 AbstractCegarLoop]: Abstraction has 2737 states and 10861 transitions. [2022-11-25 23:58:49,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:58:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 10861 transitions. [2022-11-25 23:58:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 23:58:49,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:49,948 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:49,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:50,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:50,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:50,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:50,555 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-25 23:58:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1849998988, now seen corresponding path program 2 times [2022-11-25 23:58:50,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:58:50,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51237439] [2022-11-25 23:58:50,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:58:50,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:58:50,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:58:50,557 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:58:50,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-25 23:58:50,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:58:50,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:58:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:58:51,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:51,160 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:58:51,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:58:51,319 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:58:51,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:58:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:58:51,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:58:51,459 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:58:51,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:58:51,553 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 23:58:51,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:58:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:58:51,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:58:53,300 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:58:53,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51237439] [2022-11-25 23:58:53,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51237439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:58:53,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2137689635] [2022-11-25 23:58:53,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:58:53,301 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:58:53,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:58:53,302 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:58:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-25 23:58:54,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:58:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:58:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:58:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:54,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:58:54,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:58:54,407 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:58:54,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:58:54,843 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:54,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:58:54,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:58:55,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:58:55,059 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:58:55,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-25 23:58:55,079 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:58:55,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:58:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:58:55,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:59:15,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2137689635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:15,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209225840] [2022-11-25 23:59:15,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:59:15,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:15,525 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:15,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-25 23:59:15,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:59:15,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:59:15,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:59:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:16,130 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:59:16,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:59:16,286 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:59:16,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:59:16,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:16,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:59:16,874 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:59:16,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:59:17,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:17,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:59:17,087 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:59:17,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:59:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:59:17,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:34,575 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:59:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:59:39,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209225840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:39,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:59:39,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8, 8, 8, 8] total 38 [2022-11-25 23:59:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505552648] [2022-11-25 23:59:39,980 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:39,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 23:59:39,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:59:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 23:59:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1354, Unknown=7, NotChecked=0, Total=1560 [2022-11-25 23:59:39,981 INFO L87 Difference]: Start difference. First operand 2737 states and 10861 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:52,710 WARN L233 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 72 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:00:00,273 WARN L233 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:00:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:40,186 INFO L93 Difference]: Finished difference Result 16437 states and 71080 transitions. [2022-11-26 00:00:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-26 00:00:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:00:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:40,282 INFO L225 Difference]: With dead ends: 16437 [2022-11-26 00:00:40,283 INFO L226 Difference]: Without dead ends: 16437 [2022-11-26 00:00:40,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 90.2s TimeCoverageRelationStatistics Valid=1877, Invalid=7236, Unknown=7, NotChecked=0, Total=9120 [2022-11-26 00:00:40,286 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3660 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3660 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:40,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3660 Valid, 245 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2022-11-26 00:00:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16437 states. [2022-11-26 00:00:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16437 to 3787. [2022-11-26 00:00:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3749 states have (on average 4.836489730594825) internal successors, (18132), 3786 states have internal predecessors, (18132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 18132 transitions. [2022-11-26 00:00:40,602 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 18132 transitions. Word has length 19 [2022-11-26 00:00:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:40,602 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 18132 transitions. [2022-11-26 00:00:40,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 18132 transitions. [2022-11-26 00:00:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:00:40,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:40,603 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:40,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:40,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:41,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:41,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:00:41,204 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:00:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1849998990, now seen corresponding path program 1 times [2022-11-26 00:00:41,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:00:41,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744206276] [2022-11-26 00:00:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:41,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:00:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:00:41,207 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:00:41,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-26 00:00:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:00:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:41,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:00:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:41,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:00:41,878 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:00:41,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:00:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:00:42,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:42,933 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 103 treesize of output 95 [2022-11-26 00:00:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:00:43,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:00:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744206276] [2022-11-26 00:00:43,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744206276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945420222] [2022-11-26 00:00:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:43,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:00:43,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:00:43,807 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:00:43,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-26 00:00:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:00:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:46,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:00:46,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:00:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:46,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:00:46,373 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:00:46,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:00:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:00:46,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:00:48,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945420222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:48,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891851329] [2022-11-26 00:00:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:48,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:48,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:48,282 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:00:48,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-26 00:00:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:48,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:00:48,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:48,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:00:49,009 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 00:00:49,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:00:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:00:49,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:00:53,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891851329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:53,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:00:53,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 38 [2022-11-26 00:00:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641870346] [2022-11-26 00:00:53,289 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:00:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:00:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:00:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:00:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:00:53,290 INFO L87 Difference]: Start difference. First operand 3787 states and 18132 transitions. Second operand has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:46,360 INFO L93 Difference]: Finished difference Result 19822 states and 91745 transitions. [2022-11-26 00:01:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-26 00:01:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 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 19 [2022-11-26 00:01:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:46,528 INFO L225 Difference]: With dead ends: 19822 [2022-11-26 00:01:46,528 INFO L226 Difference]: Without dead ends: 19822 [2022-11-26 00:01:46,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=1756, Invalid=8144, Unknown=0, NotChecked=0, Total=9900 [2022-11-26 00:01:46,531 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4099 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4099 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:46,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4099 Valid, 271 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2022-11-26 00:01:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19822 states. [2022-11-26 00:01:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19822 to 5316. [2022-11-26 00:01:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5278 states have (on average 4.963812050018946) internal successors, (26199), 5315 states have internal predecessors, (26199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 26199 transitions. [2022-11-26 00:01:46,957 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 26199 transitions. Word has length 19 [2022-11-26 00:01:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:46,958 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 26199 transitions. [2022-11-26 00:01:46,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 26199 transitions. [2022-11-26 00:01:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:01:46,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:46,960 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:46,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:47,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:47,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:47,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:01:47,572 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:01:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1849998992, now seen corresponding path program 1 times [2022-11-26 00:01:47,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:01:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828118315] [2022-11-26 00:01:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:47,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:01:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:01:47,576 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:01:47,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-26 00:01:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:01:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:48,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:48,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-26 00:01:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:49,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:01:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828118315] [2022-11-26 00:01:49,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828118315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [100288097] [2022-11-26 00:01:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:01:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:01:49,350 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:01:49,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-26 00:01:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:01:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:50,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:01:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:51,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:52,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [100288097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:52,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471432374] [2022-11-26 00:01:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:52,422 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:52,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-26 00:01:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:52,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:01:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:52,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:01:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:01:53,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:01:55,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471432374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:55,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:01:55,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 5, 5] total 42 [2022-11-26 00:01:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417220797] [2022-11-26 00:01:55,362 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:55,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:01:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:01:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:01:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:01:55,363 INFO L87 Difference]: Start difference. First operand 5316 states and 26199 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:27,086 INFO L93 Difference]: Finished difference Result 20872 states and 89924 transitions. [2022-11-26 00:02:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-26 00:02:27,088 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:02:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:27,160 INFO L225 Difference]: With dead ends: 20872 [2022-11-26 00:02:27,160 INFO L226 Difference]: Without dead ends: 20872 [2022-11-26 00:02:27,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=2256, Invalid=9734, Unknown=0, NotChecked=0, Total=11990 [2022-11-26 00:02:27,161 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5341 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 3549 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5341 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 3549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:27,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5341 Valid, 356 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 3549 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2022-11-26 00:02:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20872 states. [2022-11-26 00:02:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20872 to 5316. [2022-11-26 00:02:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5278 states have (on average 4.565934065934066) internal successors, (24099), 5315 states have internal predecessors, (24099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 24099 transitions. [2022-11-26 00:02:27,474 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 24099 transitions. Word has length 19 [2022-11-26 00:02:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:27,475 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 24099 transitions. [2022-11-26 00:02:27,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 24099 transitions. [2022-11-26 00:02:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:02:27,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:27,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:27,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:27,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:27,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:28,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:28,077 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:02:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1533874818, now seen corresponding path program 1 times [2022-11-26 00:02:28,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:02:28,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521778569] [2022-11-26 00:02:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:28,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:02:28,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:02:28,079 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:02:28,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-26 00:02:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:02:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:28,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:02:28,713 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 00:02:28,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-11-26 00:02:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:29,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:30,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:02:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521778569] [2022-11-26 00:02:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521778569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [57143336] [2022-11-26 00:02:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:30,711 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:02:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:02:30,712 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:02:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-26 00:02:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:31,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:02:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:32,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:02:32,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:02:32,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:32,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:02:32,465 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:02:32,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:02:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:32,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:33,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:34,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [57143336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169392689] [2022-11-26 00:02:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:34,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:34,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:34,679 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:34,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-26 00:02:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:02:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:35,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:02:35,402 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 00:02:35,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:02:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:36,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:40,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169392689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:40,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:02:40,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 39 [2022-11-26 00:02:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379315315] [2022-11-26 00:02:40,372 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:40,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-26 00:02:40,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:02:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-26 00:02:40,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:02:40,374 INFO L87 Difference]: Start difference. First operand 5316 states and 24099 transitions. Second operand has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:48,377 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 83 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:03:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:28,886 INFO L93 Difference]: Finished difference Result 8008 states and 34561 transitions. [2022-11-26 00:03:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 00:03:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 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 19 [2022-11-26 00:03:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:28,911 INFO L225 Difference]: With dead ends: 8008 [2022-11-26 00:03:28,911 INFO L226 Difference]: Without dead ends: 8008 [2022-11-26 00:03:28,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=1247, Invalid=5559, Unknown=0, NotChecked=0, Total=6806 [2022-11-26 00:03:28,912 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1745 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:28,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1745 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-11-26 00:03:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-11-26 00:03:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 6736. [2022-11-26 00:03:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6736 states, 6698 states have (on average 4.499701403404001) internal successors, (30139), 6735 states have internal predecessors, (30139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6736 states to 6736 states and 30139 transitions. [2022-11-26 00:03:29,090 INFO L78 Accepts]: Start accepts. Automaton has 6736 states and 30139 transitions. Word has length 19 [2022-11-26 00:03:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:29,090 INFO L495 AbstractCegarLoop]: Abstraction has 6736 states and 30139 transitions. [2022-11-26 00:03:29,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:03:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6736 states and 30139 transitions. [2022-11-26 00:03:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:03:29,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:29,092 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-26 00:03:29,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:29,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:29,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:29,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:03:29,693 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:03:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:29,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1610858991, now seen corresponding path program 3 times [2022-11-26 00:03:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:03:29,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088840623] [2022-11-26 00:03:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:03:29,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:03:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:03:29,695 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:03:29,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-26 00:03:30,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:03:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:03:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:30,352 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:03:30,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:03:30,635 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 00:03:30,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-26 00:03:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:03:31,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:03:32,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:03:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088840623] [2022-11-26 00:03:32,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088840623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [817493086] [2022-11-26 00:03:32,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:03:32,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:03:32,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:03:32,192 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:03:32,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-26 00:03:33,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:03:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:33,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:03:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:34,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:03:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:03:34,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:03:35,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [817493086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:35,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748254018] [2022-11-26 00:03:35,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:03:35,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:35,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:03:35,053 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:03:35,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-26 00:03:39,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:03:39,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:03:39,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:03:39,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:03:41,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748254018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:41,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:03:41,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 45 [2022-11-26 00:03:41,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726887782] [2022-11-26 00:03:41,178 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:03:41,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-26 00:03:41,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:03:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-26 00:03:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:03:41,180 INFO L87 Difference]: Start difference. First operand 6736 states and 30139 transitions. Second operand has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:11,755 INFO L93 Difference]: Finished difference Result 23857 states and 107499 transitions. [2022-11-26 00:04:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-26 00:04:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:04:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:11,854 INFO L225 Difference]: With dead ends: 23857 [2022-11-26 00:04:11,854 INFO L226 Difference]: Without dead ends: 23857 [2022-11-26 00:04:11,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1033, Invalid=4079, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:04:11,855 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2714 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 3386 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2714 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 3761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 3386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:11,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2714 Valid, 300 Invalid, 3761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 3386 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2022-11-26 00:04:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23857 states. [2022-11-26 00:04:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23857 to 6751. [2022-11-26 00:04:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6751 states, 6713 states have (on average 4.492179353493222) internal successors, (30156), 6750 states have internal predecessors, (30156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 30156 transitions. [2022-11-26 00:04:12,212 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 30156 transitions. Word has length 20 [2022-11-26 00:04:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:12,213 INFO L495 AbstractCegarLoop]: Abstraction has 6751 states and 30156 transitions. [2022-11-26 00:04:12,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 30156 transitions. [2022-11-26 00:04:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:04:12,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:12,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:12,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:12,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:12,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:12,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:12,815 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:04:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1515398908, now seen corresponding path program 2 times [2022-11-26 00:04:12,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:12,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790597000] [2022-11-26 00:04:12,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:04:12,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:12,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:12,818 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:12,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-26 00:04:13,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 00:04:13,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:04:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:13,384 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:04:13,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:04:13,551 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:04:13,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 00:04:13,667 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:13,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:04:13,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:04:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:13,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:13,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-26 00:04:13,974 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-26 00:04:13,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-26 00:04:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:04:14,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:14,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:14,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790597000] [2022-11-26 00:04:14,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790597000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:14,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:14,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:04:14,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084446128] [2022-11-26 00:04:14,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:04:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:04:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:14,504 INFO L87 Difference]: Start difference. First operand 6751 states and 30156 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:15,121 INFO L93 Difference]: Finished difference Result 6145 states and 26477 transitions. [2022-11-26 00:04:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:04:15,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:04:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:15,214 INFO L225 Difference]: With dead ends: 6145 [2022-11-26 00:04:15,214 INFO L226 Difference]: Without dead ends: 6145 [2022-11-26 00:04:15,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:04:15,214 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:15,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:04:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2022-11-26 00:04:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 5597. [2022-11-26 00:04:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5568 states have (on average 4.339798850574713) internal successors, (24164), 5596 states have internal predecessors, (24164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 24164 transitions. [2022-11-26 00:04:15,308 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 24164 transitions. Word has length 20 [2022-11-26 00:04:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:15,308 INFO L495 AbstractCegarLoop]: Abstraction has 5597 states and 24164 transitions. [2022-11-26 00:04:15,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 24164 transitions. [2022-11-26 00:04:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:04:15,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:15,310 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 1, 1, 1] [2022-11-26 00:04:15,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:15,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:15,522 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:04:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash -428953760, now seen corresponding path program 4 times [2022-11-26 00:04:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:15,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548296229] [2022-11-26 00:04:15,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:04:15,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:15,525 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:15,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-26 00:04:15,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:04:15,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-26 00:04:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:16,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:04:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:04:16,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:22,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:22,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548296229] [2022-11-26 00:04:22,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548296229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:22,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [512137677] [2022-11-26 00:04:22,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:04:22,168 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:22,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:04:22,168 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:04:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-26 00:04:22,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:04:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:04:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:04:24,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:04:27,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [512137677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:27,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344178001] [2022-11-26 00:04:27,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:04:27,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:27,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:27,919 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:27,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c734d15-2b33-4157-b8a3-bc74d038cd6d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process