./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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 [2022-11-26 01:11:51,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:11:51,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:11:51,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:11:51,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:11:51,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:11:51,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:11:52,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:11:52,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:11:52,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:11:52,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:11:52,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:11:52,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:11:52,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:11:52,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:11:52,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:11:52,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:11:52,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:11:52,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:11:52,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:11:52,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:11:52,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:11:52,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:11:52,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:11:52,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:11:52,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:11:52,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:11:52,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:11:52,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:11:52,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:11:52,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:11:52,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:11:52,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:11:52,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:11:52,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:11:52,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:11:52,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:11:52,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:11:52,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:11:52,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:11:52,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:11:52,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 01:11:52,119 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:11:52,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:11:52,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:11:52,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:11:52,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:11:52,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:11:52,121 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:11:52,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:11:52,122 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:11:52,122 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:11:52,122 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:11:52,122 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:11:52,123 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:11:52,123 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:11:52,123 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:11:52,124 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:11:52,124 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:11:52,124 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:11:52,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:11:52,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:11:52,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:11:52,126 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:11:52,126 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:11:52,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:11:52,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:11:52,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:11:52,127 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:11:52,128 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:11:52,128 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:11:52,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:11:52,128 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:11:52,129 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:11:52,129 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:11:52,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:11:52,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:11:52,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:52,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:11:52,130 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:11:52,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:11:52,131 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:11:52,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:11:52,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:11:52,131 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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-26 01:11:52,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:11:52,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:11:52,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:11:52,477 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:11:52,478 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:11:52,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-26 01:11:55,620 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:11:55,895 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:11:55,896 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-26 01:11:55,905 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data/be2b0aeaf/445e00840c7b447c9ee82943b17c79d6/FLAGa579f9360 [2022-11-26 01:11:55,925 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data/be2b0aeaf/445e00840c7b447c9ee82943b17c79d6 [2022-11-26 01:11:55,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:11:55,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:11:55,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:55,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:11:55,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:11:55,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:55" (1/1) ... [2022-11-26 01:11:55,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533d46c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:55, skipping insertion in model container [2022-11-26 01:11:55,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:55" (1/1) ... [2022-11-26 01:11:55,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:11:55,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:11:56,169 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:56,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:56,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:56,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:56,178 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:56,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:56,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:56,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:56,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:56,184 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:56,193 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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-26 01:11:56,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:11:56,217 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) [2022-11-26 01:11:56,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c52e3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:56, skipping insertion in model container [2022-11-26 01:11:56,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:56,219 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 01:11:56,221 INFO L158 Benchmark]: Toolchain (without parser) took 285.28ms. Allocated memory is still 134.2MB. Free memory was 79.8MB in the beginning and 69.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 01:11:56,222 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 134.2MB. Free memory was 109.5MB in the beginning and 109.3MB in the end (delta: 176.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:11:56,223 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.62ms. Allocated memory is still 134.2MB. Free memory was 79.7MB in the beginning and 69.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 01:11:56,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 134.2MB. Free memory was 109.5MB in the beginning and 109.3MB in the end (delta: 176.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.62ms. Allocated memory is still 134.2MB. Free memory was 79.7MB in the beginning and 69.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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 [2022-11-26 01:11:58,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:11:58,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:11:58,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:11:58,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:11:58,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:11:58,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:11:58,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:11:58,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:11:58,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:11:58,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:11:58,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:11:58,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:11:58,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:11:58,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:11:58,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:11:58,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:11:58,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:11:58,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:11:58,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:11:58,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:11:58,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:11:58,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:11:58,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:11:58,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:11:58,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:11:58,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:11:58,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:11:58,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:11:58,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:11:58,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:11:58,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:11:58,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:11:58,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:11:58,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:11:58,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:11:58,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:11:58,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:11:58,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:11:58,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:11:58,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:11:58,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 01:11:59,016 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:11:59,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:11:59,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:11:59,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:11:59,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:11:59,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:11:59,020 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:11:59,020 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:11:59,021 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:11:59,021 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:11:59,022 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:11:59,023 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:11:59,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:11:59,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:11:59,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:11:59,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:11:59,025 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:11:59,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:11:59,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:11:59,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:11:59,026 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:11:59,026 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:11:59,026 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:11:59,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:11:59,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:11:59,027 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 01:11:59,027 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 01:11:59,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:11:59,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:11:59,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:11:59,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 01:11:59,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:11:59,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:59,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:11:59,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:11:59,030 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 01:11:59,031 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 01:11:59,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:11:59,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 01:11:59,031 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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-26 01:11:59,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:11:59,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:11:59,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:11:59,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:11:59,539 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:11:59,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-26 01:12:03,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:12:03,277 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:12:03,278 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-26 01:12:03,286 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data/648963d5a/d41521b1e96447b4b6b303f7f6336d1c/FLAGd83b028ca [2022-11-26 01:12:03,306 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/data/648963d5a/d41521b1e96447b4b6b303f7f6336d1c [2022-11-26 01:12:03,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:12:03,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:12:03,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:03,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:12:03,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:12:03,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ceff34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03, skipping insertion in model container [2022-11-26 01:12:03,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:12:03,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:12:03,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,559 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,559 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,561 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,562 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,572 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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-26 01:12:03,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:03,613 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 01:12:03,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:12:03,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,642 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,646 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,647 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,656 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,663 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,668 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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-26 01:12:03,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:03,692 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:12:03,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,712 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,712 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,713 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,713 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,716 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:12:03,716 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:12:03,729 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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-26 01:12:03,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:03,749 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:12:03,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03 WrapperNode [2022-11-26 01:12:03,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:03,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:03,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:12:03,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:12:03,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,797 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 186 [2022-11-26 01:12:03,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:03,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:12:03,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:12:03,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:12:03,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,837 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:12:03,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:12:03,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:12:03,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:12:03,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (1/1) ... [2022-11-26 01:12:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:12:03,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:03,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:12:03,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:12:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:12:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 01:12:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:12:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 01:12:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 01:12:03,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 01:12:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 01:12:03,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 01:12:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-26 01:12:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-26 01:12:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:12:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:12:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:12:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:12:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 01:12:03,942 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 01:12:04,118 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:12:04,121 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:12:04,806 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:12:04,915 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:12:04,915 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 01:12:04,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:04 BoogieIcfgContainer [2022-11-26 01:12:04,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:12:04,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:12:04,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:12:04,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:12:04,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:12:03" (1/3) ... [2022-11-26 01:12:04,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6059536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:04, skipping insertion in model container [2022-11-26 01:12:04,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:03" (2/3) ... [2022-11-26 01:12:04,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6059536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:04, skipping insertion in model container [2022-11-26 01:12:04,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:04" (3/3) ... [2022-11-26 01:12:04,926 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-11-26 01:12:04,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:12:04,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-26 01:12:04,957 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 01:12:05,042 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-26 01:12:05,082 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 01:12:05,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 212 transitions, 440 flow [2022-11-26 01:12:05,116 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 212 transitions, 440 flow [2022-11-26 01:12:05,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 212 transitions, 440 flow [2022-11-26 01:12:05,280 INFO L130 PetriNetUnfolder]: 15/210 cut-off events. [2022-11-26 01:12:05,280 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-26 01:12:05,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 15/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-26 01:12:05,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2022-11-26 01:12:41,070 INFO L134 LiptonReduction]: Checked pairs total: 2847 [2022-11-26 01:12:41,071 INFO L136 LiptonReduction]: Total number of compositions: 238 [2022-11-26 01:12:41,079 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 50 transitions, 116 flow [2022-11-26 01:12:41,127 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 0 states 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 01:12:41,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:12:41,169 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;@1cd30fa0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:12:41,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-26 01:12:41,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 0 states 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 01:12:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:12:41,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:41,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:12:41,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:41,195 INFO L85 PathProgramCache]: Analyzing trace with hash 28237, now seen corresponding path program 1 times [2022-11-26 01:12:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:41,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862096903] [2022-11-26 01:12:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:41,212 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 01:12:41,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:41,226 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:41,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:12:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:41,520 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 01:12:41,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 01:12:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:41,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:41,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862096903] [2022-11-26 01:12:41,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862096903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:41,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:41,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:41,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114014547] [2022-11-26 01:12:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:41,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:41,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:41,637 INFO L87 Difference]: Start difference. First operand has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 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) [2022-11-26 01:12:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:41,992 INFO L93 Difference]: Finished difference Result 295 states and 770 transitions. [2022-11-26 01:12:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:41,995 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 [2022-11-26 01:12:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:42,020 INFO L225 Difference]: With dead ends: 295 [2022-11-26 01:12:42,020 INFO L226 Difference]: Without dead ends: 295 [2022-11-26 01:12:42,021 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 [2022-11-26 01:12:42,028 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:42,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-26 01:12:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-11-26 01:12:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 207 states have (on average 3.7198067632850242) internal successors, (770), 294 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 01:12:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 770 transitions. [2022-11-26 01:12:42,121 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 770 transitions. Word has length 2 [2022-11-26 01:12:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:42,122 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 770 transitions. [2022-11-26 01:12:42,122 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) [2022-11-26 01:12:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 770 transitions. [2022-11-26 01:12:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:12:42,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:42,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:12:42,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:42,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:42,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash 28238, now seen corresponding path program 1 times [2022-11-26 01:12:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:42,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139518831] [2022-11-26 01:12:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:42,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:42,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:42,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:12:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:42,523 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:12:42,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:12:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:42,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:42,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:42,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139518831] [2022-11-26 01:12:42,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139518831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:42,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:42,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:42,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401539866] [2022-11-26 01:12:42,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:42,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:42,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:42,566 INFO L87 Difference]: Start difference. First operand 295 states and 770 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) [2022-11-26 01:12:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:42,986 INFO L93 Difference]: Finished difference Result 298 states and 774 transitions. [2022-11-26 01:12:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:42,987 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 [2022-11-26 01:12:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:42,990 INFO L225 Difference]: With dead ends: 298 [2022-11-26 01:12:42,990 INFO L226 Difference]: Without dead ends: 298 [2022-11-26 01:12:42,991 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 [2022-11-26 01:12:42,992 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:42,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-26 01:12:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-11-26 01:12:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 209 states have (on average 3.7033492822966507) internal successors, (774), 296 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 01:12:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 774 transitions. [2022-11-26 01:12:43,007 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 774 transitions. Word has length 2 [2022-11-26 01:12:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:43,008 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 774 transitions. [2022-11-26 01:12:43,008 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) [2022-11-26 01:12:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 774 transitions. [2022-11-26 01:12:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 01:12:43,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:43,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 01:12:43,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:43,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:43,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash 882559, now seen corresponding path program 1 times [2022-11-26 01:12:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:43,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807333252] [2022-11-26 01:12:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:43,231 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 [2022-11-26 01:12:43,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:43,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:43,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:12:43,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:43,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 01:12:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:43,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:43,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:43,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807333252] [2022-11-26 01:12:43,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807333252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:43,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:43,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:12:43,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912130970] [2022-11-26 01:12:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:43,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:43,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:43,438 INFO L87 Difference]: Start difference. First operand 297 states and 774 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:43,748 INFO L93 Difference]: Finished difference Result 296 states and 772 transitions. [2022-11-26 01:12:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 01:12:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:43,751 INFO L225 Difference]: With dead ends: 296 [2022-11-26 01:12:43,751 INFO L226 Difference]: Without dead ends: 296 [2022-11-26 01:12:43,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:43,752 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:43,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-26 01:12:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-11-26 01:12:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 209 states have (on average 3.6937799043062203) internal successors, (772), 295 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 01:12:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 772 transitions. [2022-11-26 01:12:43,771 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 772 transitions. Word has length 3 [2022-11-26 01:12:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:43,775 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 772 transitions. [2022-11-26 01:12:43,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 772 transitions. [2022-11-26 01:12:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 01:12:43,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:43,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 01:12:43,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:43,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash 881668, now seen corresponding path program 1 times [2022-11-26 01:12:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:43,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613160215] [2022-11-26 01:12:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:43,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:44,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:44,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (5)] Waiting until timeout for monitored process [2022-11-26 01:12:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:44,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:12:44,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:44,211 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:12:44,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:12:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:44,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:44,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:44,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613160215] [2022-11-26 01:12:44,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613160215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:44,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [838680386] [2022-11-26 01:12:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:44,592 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:44,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:12:44,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:12:44,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-26 01:12:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:44,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:12:44,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:44,854 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:12:44,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:12:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:44,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:45,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [838680386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:45,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660194693] [2022-11-26 01:12:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:45,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:45,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:45,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:12:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:12:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:45,214 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:12:45,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:12:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:45,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:45,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660194693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:45,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:12:45,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-26 01:12:45,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696250180] [2022-11-26 01:12:45,457 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:45,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:12:45,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:12:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:45,462 INFO L87 Difference]: Start difference. First operand 296 states and 772 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:47,686 INFO L93 Difference]: Finished difference Result 591 states and 1550 transitions. [2022-11-26 01:12:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:12:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 01:12:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:47,693 INFO L225 Difference]: With dead ends: 591 [2022-11-26 01:12:47,693 INFO L226 Difference]: Without dead ends: 591 [2022-11-26 01:12:47,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:12:47,695 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 207 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:47,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 3 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 01:12:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-26 01:12:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 302. [2022-11-26 01:12:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 215 states have (on average 3.6744186046511627) internal successors, (790), 301 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 01:12:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 790 transitions. [2022-11-26 01:12:47,726 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 790 transitions. Word has length 3 [2022-11-26 01:12:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:47,727 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 790 transitions. [2022-11-26 01:12:47,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 790 transitions. [2022-11-26 01:12:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 01:12:47,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:47,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 01:12:47,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (5)] Ended with exit code 0 [2022-11-26 01:12:47,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:48,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:48,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:48,339 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:48,339 INFO L85 PathProgramCache]: Analyzing trace with hash 27358632, now seen corresponding path program 1 times [2022-11-26 01:12:48,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602995235] [2022-11-26 01:12:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:48,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:48,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:48,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (8)] Waiting until timeout for monitored process [2022-11-26 01:12:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:48,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:12:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:48,562 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:12:48,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-26 01:12:48,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 01:12:48,715 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:12:48,715 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 12 treesize of output 18 [2022-11-26 01:12:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:48,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:49,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:49,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602995235] [2022-11-26 01:12:49,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602995235] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:49,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:49,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-11-26 01:12:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490628035] [2022-11-26 01:12:49,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:12:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:12:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:49,205 INFO L87 Difference]: Start difference. First operand 302 states and 790 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:49,853 INFO L93 Difference]: Finished difference Result 246 states and 616 transitions. [2022-11-26 01:12:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:12:49,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 01:12:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:49,857 INFO L225 Difference]: With dead ends: 246 [2022-11-26 01:12:49,857 INFO L226 Difference]: Without dead ends: 246 [2022-11-26 01:12:49,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:49,858 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 68 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:49,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:12:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-26 01:12:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-11-26 01:12:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 181 states have (on average 3.403314917127072) internal successors, (616), 245 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 01:12:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 616 transitions. [2022-11-26 01:12:49,870 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 616 transitions. Word has length 4 [2022-11-26 01:12:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:49,870 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 616 transitions. [2022-11-26 01:12:49,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 616 transitions. [2022-11-26 01:12:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 01:12:49,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:49,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 01:12:49,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (8)] Ended with exit code 0 [2022-11-26 01:12:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:50,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash 27358633, now seen corresponding path program 1 times [2022-11-26 01:12:50,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:50,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778963769] [2022-11-26 01:12:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:50,086 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 01:12:50,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:50,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:50,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (9)] Waiting until timeout for monitored process [2022-11-26 01:12:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:12:50,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:50,323 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-26 01:12:50,324 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-26 01:12:50,386 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:12:50,386 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 [2022-11-26 01:12:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:50,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:50,420 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:50,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778963769] [2022-11-26 01:12:50,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778963769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:50,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:50,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:50,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242310720] [2022-11-26 01:12:50,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:50,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:50,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:50,422 INFO L87 Difference]: Start difference. First operand 246 states and 616 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:50,665 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2022-11-26 01:12:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:50,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 01:12:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:50,668 INFO L225 Difference]: With dead ends: 190 [2022-11-26 01:12:50,668 INFO L226 Difference]: Without dead ends: 190 [2022-11-26 01:12:50,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:50,669 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:50,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:12:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-26 01:12:50,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-11-26 01:12:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 147 states have (on average 3.006802721088435) internal successors, (442), 189 states have internal predecessors, (442), 0 states have call successors, (0), 0 states 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 01:12:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 442 transitions. [2022-11-26 01:12:50,681 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 442 transitions. Word has length 4 [2022-11-26 01:12:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:50,682 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 442 transitions. [2022-11-26 01:12:50,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 442 transitions. [2022-11-26 01:12:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:50,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:50,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:50,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:50,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:50,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash 521864371, now seen corresponding path program 1 times [2022-11-26 01:12:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:50,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110630876] [2022-11-26 01:12:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:50,898 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 01:12:50,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:50,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:50,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:51,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:12:51,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:51,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:51,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:51,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110630876] [2022-11-26 01:12:51,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110630876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:51,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:51,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:12:51,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510974327] [2022-11-26 01:12:51,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:51,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:12:51,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:12:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:51,101 INFO L87 Difference]: Start difference. First operand 190 states and 442 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:51,572 INFO L93 Difference]: Finished difference Result 261 states and 580 transitions. [2022-11-26 01:12:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:12:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:12:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:51,575 INFO L225 Difference]: With dead ends: 261 [2022-11-26 01:12:51,575 INFO L226 Difference]: Without dead ends: 261 [2022-11-26 01:12:51,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:51,576 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:51,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-26 01:12:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 242. [2022-11-26 01:12:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 199 states have (on average 2.869346733668342) internal successors, (571), 241 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 01:12:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 571 transitions. [2022-11-26 01:12:51,588 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 571 transitions. Word has length 6 [2022-11-26 01:12:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:51,589 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 571 transitions. [2022-11-26 01:12:51,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 571 transitions. [2022-11-26 01:12:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:51,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:51,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:51,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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)] Ended with exit code 0 [2022-11-26 01:12:51,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:51,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 521864275, now seen corresponding path program 1 times [2022-11-26 01:12:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759742472] [2022-11-26 01:12:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:51,806 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 [2022-11-26 01:12:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:51,807 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:51,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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)] Waiting until timeout for monitored process [2022-11-26 01:12:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:12:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:51,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 01:12:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:51,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:51,951 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:51,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759742472] [2022-11-26 01:12:51,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759742472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:51,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:51,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:12:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133845764] [2022-11-26 01:12:51,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:51,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:12:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:12:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:51,955 INFO L87 Difference]: Start difference. First operand 242 states and 571 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:52,240 INFO L93 Difference]: Finished difference Result 208 states and 485 transitions. [2022-11-26 01:12:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:12:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:12:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:52,243 INFO L225 Difference]: With dead ends: 208 [2022-11-26 01:12:52,243 INFO L226 Difference]: Without dead ends: 208 [2022-11-26 01:12:52,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:12:52,244 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:52,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-26 01:12:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-11-26 01:12:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 175 states have (on average 2.7714285714285714) internal successors, (485), 207 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 01:12:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 485 transitions. [2022-11-26 01:12:52,256 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 485 transitions. Word has length 6 [2022-11-26 01:12:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:52,257 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 485 transitions. [2022-11-26 01:12:52,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 485 transitions. [2022-11-26 01:12:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:52,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:52,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:52,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:52,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash 521864276, now seen corresponding path program 1 times [2022-11-26 01:12:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766610262] [2022-11-26 01:12:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:52,473 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 01:12:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:52,474 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:52,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (12)] Waiting until timeout for monitored process [2022-11-26 01:12:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:12:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:52,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:52,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:52,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766610262] [2022-11-26 01:12:52,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766610262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:52,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:52,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:12:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770184620] [2022-11-26 01:12:52,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:52,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:12:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:12:52,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:12:52,657 INFO L87 Difference]: Start difference. First operand 208 states and 485 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:53,061 INFO L93 Difference]: Finished difference Result 362 states and 850 transitions. [2022-11-26 01:12:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:12:53,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:12:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:53,064 INFO L225 Difference]: With dead ends: 362 [2022-11-26 01:12:53,065 INFO L226 Difference]: Without dead ends: 362 [2022-11-26 01:12:53,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:53,066 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:53,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:53,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-26 01:12:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 246. [2022-11-26 01:12:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 213 states have (on average 2.995305164319249) internal successors, (638), 245 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 01:12:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 638 transitions. [2022-11-26 01:12:53,077 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 638 transitions. Word has length 6 [2022-11-26 01:12:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:53,077 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 638 transitions. [2022-11-26 01:12:53,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 638 transitions. [2022-11-26 01:12:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:53,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:53,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:53,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:53,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:53,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 521864374, now seen corresponding path program 1 times [2022-11-26 01:12:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:53,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865103505] [2022-11-26 01:12:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:53,291 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 01:12:53,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:53,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:53,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:12:53,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:53,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:53,520 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-26 01:12:53,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-26 01:12:53,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-26 01:12:53,618 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 01:12:53,619 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 [2022-11-26 01:12:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:53,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:54,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:54,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865103505] [2022-11-26 01:12:54,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865103505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:54,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1397284608] [2022-11-26 01:12:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:54,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:54,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:12:54,298 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:12:54,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-26 01:12:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:12:54,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:54,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:54,599 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-26 01:12:54,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-26 01:12:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:54,670 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 12 treesize of output 14 [2022-11-26 01:12:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:54,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:54,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1397284608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:54,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:12:54,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 4] total 9 [2022-11-26 01:12:54,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132129488] [2022-11-26 01:12:54,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:54,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:12:54,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:54,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:12:54,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:12:54,774 INFO L87 Difference]: Start difference. First operand 246 states and 638 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:55,004 INFO L93 Difference]: Finished difference Result 225 states and 586 transitions. [2022-11-26 01:12:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:12:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:55,006 INFO L225 Difference]: With dead ends: 225 [2022-11-26 01:12:55,007 INFO L226 Difference]: Without dead ends: 225 [2022-11-26 01:12:55,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:12:55,008 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:55,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:12:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-26 01:12:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-26 01:12:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 200 states have (on average 2.93) internal successors, (586), 224 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 01:12:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 586 transitions. [2022-11-26 01:12:55,017 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 586 transitions. Word has length 6 [2022-11-26 01:12:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:55,017 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 586 transitions. [2022-11-26 01:12:55,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 586 transitions. [2022-11-26 01:12:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:55,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:55,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:55,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:55,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:55,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 521864375, now seen corresponding path program 1 times [2022-11-26 01:12:55,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:55,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158675927] [2022-11-26 01:12:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:55,432 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 01:12:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:55,433 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:55,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:55,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:12:55,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:55,616 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-26 01:12:55,617 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-26 01:12:55,655 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:12:55,656 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 [2022-11-26 01:12:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:55,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:55,683 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158675927] [2022-11-26 01:12:55,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158675927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:55,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:55,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:55,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952684983] [2022-11-26 01:12:55,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:55,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:55,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:55,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:55,685 INFO L87 Difference]: Start difference. First operand 225 states and 586 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:55,876 INFO L93 Difference]: Finished difference Result 204 states and 534 transitions. [2022-11-26 01:12:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:55,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:12:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:55,878 INFO L225 Difference]: With dead ends: 204 [2022-11-26 01:12:55,878 INFO L226 Difference]: Without dead ends: 204 [2022-11-26 01:12:55,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:55,879 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:55,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:12:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-26 01:12:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-26 01:12:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 187 states have (on average 2.855614973262032) internal successors, (534), 203 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 01:12:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 534 transitions. [2022-11-26 01:12:55,891 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 534 transitions. Word has length 6 [2022-11-26 01:12:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:55,892 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 534 transitions. [2022-11-26 01:12:55,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 534 transitions. [2022-11-26 01:12:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:55,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:55,894 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 01:12:55,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:56,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:56,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:12:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 502213582, now seen corresponding path program 2 times [2022-11-26 01:12:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:56,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215660487] [2022-11-26 01:12:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:12:56,108 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 [2022-11-26 01:12:56,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:56,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:12:56,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:12:56,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:12:56,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:12:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:12:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:56,290 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:12:56,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:12:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:56,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:57,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215660487] [2022-11-26 01:12:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215660487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1582851603] [2022-11-26 01:12:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:12:57,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:12:57,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:12:57,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-26 01:12:57,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:12:57,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:12:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:12:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:57,470 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:12:57,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:12:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:57,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:58,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1582851603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912068519] [2022-11-26 01:12:58,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:12:58,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:58,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:58,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 01:12:58,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:12:58,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:12:58,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:12:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:58,774 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:12:58,775 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:12:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:58,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:59,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912068519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:59,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:12:59,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-26 01:12:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564542078] [2022-11-26 01:12:59,042 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:59,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:12:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:12:59,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:12:59,043 INFO L87 Difference]: Start difference. First operand 204 states and 534 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:01,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:04,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:06,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:07,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:08,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:09,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:13,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:15,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:19,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:23,681 INFO L93 Difference]: Finished difference Result 1524 states and 4084 transitions. [2022-11-26 01:13:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:13:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:13:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:23,691 INFO L225 Difference]: With dead ends: 1524 [2022-11-26 01:13:23,691 INFO L226 Difference]: Without dead ends: 1524 [2022-11-26 01:13:23,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:13:23,692 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 936 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 118 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:23,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 27 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 747 Invalid, 1 Unknown, 0 Unchecked, 23.0s Time] [2022-11-26 01:13:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-11-26 01:13:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 222. [2022-11-26 01:13:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 205 states have (on average 2.7804878048780486) internal successors, (570), 221 states have internal predecessors, (570), 0 states have call successors, (0), 0 states 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 01:13:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 570 transitions. [2022-11-26 01:13:23,712 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 570 transitions. Word has length 6 [2022-11-26 01:13:23,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:23,712 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 570 transitions. [2022-11-26 01:13:23,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 570 transitions. [2022-11-26 01:13:23,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:13:23,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:23,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:23,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:23,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:24,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:13:24,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:13:24,316 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:13:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1591591063, now seen corresponding path program 1 times [2022-11-26 01:13:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:24,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110529118] [2022-11-26 01:13:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:24,317 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 01:13:24,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:24,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:13:24,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:13:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 01:13:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:24,573 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:13:24,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:13:24,642 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 01:13:24,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 01:13:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:24,774 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 01:13:24,787 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:13:24,787 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 01:13:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:13:24,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:13:30,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:30,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110529118] [2022-11-26 01:13:30,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110529118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:30,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [50204628] [2022-11-26 01:13:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:30,986 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:30,987 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:30,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-26 01:13:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:13:31,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:31,327 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:13:31,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:13:31,405 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 01:13:31,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 01:13:31,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:31,582 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 01:13:31,596 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:13:31,597 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 01:13:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:13:31,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:13:40,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [50204628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104485715] [2022-11-26 01:13:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:40,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:40,976 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:40,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 01:13:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 01:13:41,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:41,193 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:13:41,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:13:41,403 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 01:13:41,403 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 22 [2022-11-26 01:13:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:41,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104485715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:47,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:13:47,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 18 [2022-11-26 01:13:47,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25974744] [2022-11-26 01:13:47,587 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:47,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:13:47,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:47,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:13:47,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=295, Unknown=2, NotChecked=0, Total=380 [2022-11-26 01:13:47,589 INFO L87 Difference]: Start difference. First operand 222 states and 570 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 01:14:15,068 WARN L233 SmtUtils]: Spent 27.21s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:16,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:14:26,945 WARN L233 SmtUtils]: Spent 9.92s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:34,015 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 75 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:46,358 WARN L233 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:00,055 WARN L233 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 77 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:17,031 WARN L233 SmtUtils]: Spent 13.71s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:35,379 WARN L233 SmtUtils]: Spent 12.56s on a formula simplification. DAG size of input: 78 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:58,282 WARN L233 SmtUtils]: Spent 16.66s on a formula simplification. DAG size of input: 68 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:02,422 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 [1] [2022-11-26 01:16:04,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:25,483 WARN L233 SmtUtils]: Spent 16.98s on a formula simplification. DAG size of input: 71 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:28,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:29,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:32,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:35,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:38,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:41,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:54,636 WARN L233 SmtUtils]: Spent 9.72s on a formula simplification. DAG size of input: 68 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:56,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:17:05,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:17:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:05,913 INFO L93 Difference]: Finished difference Result 628 states and 1617 transitions. [2022-11-26 01:17:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 01:17:05,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-26 01:17:05,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:05,918 INFO L225 Difference]: With dead ends: 628 [2022-11-26 01:17:05,918 INFO L226 Difference]: Without dead ends: 628 [2022-11-26 01:17:05,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 185.1s TimeCoverageRelationStatistics Valid=227, Invalid=755, Unknown=10, NotChecked=0, Total=992 [2022-11-26 01:17:05,919 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 392 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 32 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:05,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 22 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 508 Invalid, 8 Unknown, 0 Unchecked, 33.6s Time] [2022-11-26 01:17:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-26 01:17:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 322. [2022-11-26 01:17:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 305 states have (on average 2.875409836065574) internal successors, (877), 321 states have internal predecessors, (877), 0 states have call successors, (0), 0 states 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 01:17:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 877 transitions. [2022-11-26 01:17:05,932 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 877 transitions. Word has length 7 [2022-11-26 01:17:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:05,933 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 877 transitions. [2022-11-26 01:17:05,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 01:17:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 877 transitions. [2022-11-26 01:17:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:17:05,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:05,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:17:05,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:06,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:17:06,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:06,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:06,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:17:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1591591062, now seen corresponding path program 1 times [2022-11-26 01:17:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:17:06,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040999136] [2022-11-26 01:17:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:06,538 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 01:17:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:17:06,539 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:06,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (22)] Waiting until timeout for monitored process [2022-11-26 01:17:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:17:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:06,768 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 01:17:06,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 01:17:06,819 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:17:06,819 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 01:17:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:17:06,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:17:06,840 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:17:06,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040999136] [2022-11-26 01:17:06,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040999136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:17:06,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:17:06,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:17:06,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293114594] [2022-11-26 01:17:06,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:17:06,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:17:06,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:17:06,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:17:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:17:06,842 INFO L87 Difference]: Start difference. First operand 322 states and 877 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) [2022-11-26 01:17:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:07,065 INFO L93 Difference]: Finished difference Result 270 states and 692 transitions. [2022-11-26 01:17:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:17:07,066 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 [2022-11-26 01:17:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:07,068 INFO L225 Difference]: With dead ends: 270 [2022-11-26 01:17:07,068 INFO L226 Difference]: Without dead ends: 270 [2022-11-26 01:17:07,068 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 [2022-11-26 01:17:07,069 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:07,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:17:07,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-26 01:17:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-11-26 01:17:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 260 states have (on average 2.6615384615384614) internal successors, (692), 269 states have internal predecessors, (692), 0 states have call successors, (0), 0 states 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 01:17:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 692 transitions. [2022-11-26 01:17:07,086 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 692 transitions. Word has length 7 [2022-11-26 01:17:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:07,086 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 692 transitions. [2022-11-26 01:17:07,087 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) [2022-11-26 01:17:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 692 transitions. [2022-11-26 01:17:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:17:07,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:07,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:17:07,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (22)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:07,302 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:17:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:07,302 INFO L85 PathProgramCache]: Analyzing trace with hash -999582471, now seen corresponding path program 1 times [2022-11-26 01:17:07,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:17:07,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270960707] [2022-11-26 01:17:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:07,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:17:07,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:17:07,304 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:07,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (23)] Waiting until timeout for monitored process [2022-11-26 01:17:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:07,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:17:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:07,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:17:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:17:07,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:17:08,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:17:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270960707] [2022-11-26 01:17:08,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270960707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1745061238] [2022-11-26 01:17:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:08,365 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:17:08,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:17:08,367 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:17:08,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-26 01:17:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:08,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:17:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:08,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:09,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1745061238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:09,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124985293] [2022-11-26 01:17:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:09,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:09,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:17:09,333 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:17:09,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 01:17:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:09,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:17:09,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:09,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124985293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:09,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:17:09,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 17 [2022-11-26 01:17:09,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296173770] [2022-11-26 01:17:09,642 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:17:09,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 01:17:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:17:09,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 01:17:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:17:09,647 INFO L87 Difference]: Start difference. First operand 270 states and 692 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 01:17:14,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:17:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:16,167 INFO L93 Difference]: Finished difference Result 913 states and 2246 transitions. [2022-11-26 01:17:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 01:17:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 01:17:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:16,173 INFO L225 Difference]: With dead ends: 913 [2022-11-26 01:17:16,173 INFO L226 Difference]: Without dead ends: 913 [2022-11-26 01:17:16,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:17:16,174 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 410 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:16,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 0 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-26 01:17:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-26 01:17:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 623. [2022-11-26 01:17:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 613 states have (on average 2.774877650897227) internal successors, (1701), 622 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states 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 01:17:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1701 transitions. [2022-11-26 01:17:16,196 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1701 transitions. Word has length 8 [2022-11-26 01:17:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:16,196 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 1701 transitions. [2022-11-26 01:17:16,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 01:17:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1701 transitions. [2022-11-26 01:17:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:17:16,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:16,198 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-26 01:17:16,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:16,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (23)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:16,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:16,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:16,801 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:17:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:16,802 INFO L85 PathProgramCache]: Analyzing trace with hash 74383923, now seen corresponding path program 2 times [2022-11-26 01:17:16,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:17:16,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150822417] [2022-11-26 01:17:16,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:17:16,802 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 [2022-11-26 01:17:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:17:16,803 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:16,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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)] Waiting until timeout for monitored process [2022-11-26 01:17:16,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 01:17:16,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:17:16,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:17:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:17,032 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:17:17,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:17:17,117 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 01:17:17,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 01:17:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:17,241 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 01:17:17,261 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:17:17,261 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 01:17:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:17:17,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:17:17,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:17:17,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150822417] [2022-11-26 01:17:17,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150822417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:17:17,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:17:17,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:17:17,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281199365] [2022-11-26 01:17:17,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:17:17,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:17:17,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:17:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:17:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:17:17,320 INFO L87 Difference]: Start difference. First operand 623 states and 1701 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) [2022-11-26 01:17:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:17,603 INFO L93 Difference]: Finished difference Result 561 states and 1478 transitions. [2022-11-26 01:17:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:17:17,604 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 10 [2022-11-26 01:17:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:17,607 INFO L225 Difference]: With dead ends: 561 [2022-11-26 01:17:17,607 INFO L226 Difference]: Without dead ends: 561 [2022-11-26 01:17:17,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:17:17,608 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:17,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:17:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-26 01:17:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 358. [2022-11-26 01:17:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 2.5665722379603397) internal successors, (906), 357 states have internal predecessors, (906), 0 states have call successors, (0), 0 states 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 01:17:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 906 transitions. [2022-11-26 01:17:17,632 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 906 transitions. Word has length 10 [2022-11-26 01:17:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:17,632 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 906 transitions. [2022-11-26 01:17:17,632 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) [2022-11-26 01:17:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 906 transitions. [2022-11-26 01:17:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:17:17,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:17,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:17:17,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:17,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:17,846 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:17:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:17,846 INFO L85 PathProgramCache]: Analyzing trace with hash 763094248, now seen corresponding path program 1 times [2022-11-26 01:17:17,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:17:17,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637696945] [2022-11-26 01:17:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:17,847 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 01:17:17,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:17:17,849 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:17,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:17:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:18,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:17:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:17:18,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:18,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-26 01:17:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:17:18,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:17:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637696945] [2022-11-26 01:17:18,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637696945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972977636] [2022-11-26 01:17:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:18,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:17:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:17:18,500 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:17:18,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-26 01:17:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:18,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:17:18,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:18,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 01:17:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:17:19,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:17:20,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1972977636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665089292] [2022-11-26 01:17:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:20,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:20,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:17:20,600 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:17:20,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 01:17:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:17:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:17:20,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:17:20,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665089292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:17:20,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-26 01:17:20,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5, 6, 6] total 21 [2022-11-26 01:17:20,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503996370] [2022-11-26 01:17:20,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:17:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:17:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:17:20,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:17:20,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:17:20,773 INFO L87 Difference]: Start difference. First operand 358 states and 906 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-26 01:17:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:21,111 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2022-11-26 01:17:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:17:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 01:17:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:21,114 INFO L225 Difference]: With dead ends: 350 [2022-11-26 01:17:21,114 INFO L226 Difference]: Without dead ends: 350 [2022-11-26 01:17:21,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:17:21,115 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:21,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:17:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-26 01:17:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2022-11-26 01:17:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 346 states have (on average 2.5173410404624277) internal successors, (871), 349 states have internal predecessors, (871), 0 states have call successors, (0), 0 states 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 01:17:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 871 transitions. [2022-11-26 01:17:21,125 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 871 transitions. Word has length 11 [2022-11-26 01:17:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:21,126 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 871 transitions. [2022-11-26 01:17:21,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-26 01:17:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 871 transitions. [2022-11-26 01:17:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:17:21,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:21,127 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-26 01:17:21,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:21,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:21,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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)] Ended with exit code 0 [2022-11-26 01:17:21,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:21,736 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:17:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1059135502, now seen corresponding path program 3 times [2022-11-26 01:17:21,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:17:21,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434318120] [2022-11-26 01:17:21,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:17:21,736 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 01:17:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:17:21,737 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:17:21,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (30)] Waiting until timeout for monitored process [2022-11-26 01:17:21,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 01:17:21,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:17:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:17:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:22,038 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:17:22,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:17:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:22,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:26,368 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:17:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434318120] [2022-11-26 01:17:26,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434318120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623435756] [2022-11-26 01:17:26,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:17:26,369 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:17:26,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:17:26,370 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:17:26,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-26 01:17:27,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 01:17:27,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:17:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:17:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:27,223 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:17:27,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:17:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:27,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:27,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1623435756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568180911] [2022-11-26 01:17:27,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:17:27,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:27,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:17:27,946 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:17:27,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 01:17:30,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 01:17:30,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:17:30,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:17:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:30,512 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 01:17:30,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 01:17:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:30,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:17:35,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568180911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:35,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:17:35,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 30 [2022-11-26 01:17:35,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875497855] [2022-11-26 01:17:35,586 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:17:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 01:17:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:17:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 01:17:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:17:35,588 INFO L87 Difference]: Start difference. First operand 350 states and 871 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:17:49,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:17:51,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:17:53,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:17:55,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:17:57,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:17:59,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:01,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:03,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:05,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:07,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:09,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:11,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:13,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:15,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:17,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:19,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:18:21,265 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 [] [2022-11-26 01:18:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:18:35,597 INFO L93 Difference]: Finished difference Result 2892 states and 7444 transitions. [2022-11-26 01:18:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 01:18:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2022-11-26 01:18:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:18:35,608 INFO L225 Difference]: With dead ends: 2892 [2022-11-26 01:18:35,608 INFO L226 Difference]: Without dead ends: 2892 [2022-11-26 01:18:35,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=554, Invalid=1168, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 01:18:35,609 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2117 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 345 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2117 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:18:35,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2117 Valid, 125 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 2687 Invalid, 17 Unknown, 0 Unchecked, 43.2s Time] [2022-11-26 01:18:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-11-26 01:18:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 366. [2022-11-26 01:18:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 362 states have (on average 2.494475138121547) internal successors, (903), 365 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 01:18:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 903 transitions. [2022-11-26 01:18:35,646 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 903 transitions. Word has length 12 [2022-11-26 01:18:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:18:35,646 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 903 transitions. [2022-11-26 01:18:35,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:18:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 903 transitions. [2022-11-26 01:18:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:18:35,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:18:35,647 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1] [2022-11-26 01:18:35,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 01:18:35,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (30)] Forceful destruction successful, exit code 0 [2022-11-26 01:18:36,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-26 01:18:36,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:18:36,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:18:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:18:36,258 INFO L85 PathProgramCache]: Analyzing trace with hash -692027249, now seen corresponding path program 1 times [2022-11-26 01:18:36,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:18:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426532760] [2022-11-26 01:18:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:18:36,259 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 01:18:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:18:36,260 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:18:36,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (33)] Waiting until timeout for monitored process [2022-11-26 01:18:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:18:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 01:18:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:18:36,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:18:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:18:37,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:18:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:18:42,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:18:42,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426532760] [2022-11-26 01:18:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426532760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:18:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1431910358] [2022-11-26 01:18:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:18:42,049 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:18:42,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:18:42,050 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:18:42,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-26 01:18:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:18:42,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:18:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:18:42,407 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:18:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:18:43,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:18:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:18:44,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1431910358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:18:44,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797424575] [2022-11-26 01:18:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:18:44,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:18:44,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:18:44,562 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:18:44,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 01:18:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:18:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 01:18:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:18:44,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 01:18:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:18:45,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:18:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:18:45,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797424575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:18:45,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:18:45,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 35 [2022-11-26 01:18:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269351878] [2022-11-26 01:18:45,751 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:18:45,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 01:18:45,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:18:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 01:18:45,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 01:18:45,753 INFO L87 Difference]: Start difference. First operand 366 states and 903 transitions. Second operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 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) [2022-11-26 01:18:59,195 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 [] [2022-11-26 01:19:01,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:03,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:05,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:06,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:08,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:10,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:12,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:14,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:16,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:18,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:19:20,956 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 [] [2022-11-26 01:19:40,132 WARN L233 SmtUtils]: Spent 9.01s on a formula simplification. DAG size of input: 146 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:50,561 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 138 DAG size of output: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:59,307 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 127 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:20:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:36,781 INFO L93 Difference]: Finished difference Result 5920 states and 15300 transitions. [2022-11-26 01:20:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 01:20:36,784 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 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 15 [2022-11-26 01:20:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:36,807 INFO L225 Difference]: With dead ends: 5920 [2022-11-26 01:20:36,807 INFO L226 Difference]: Without dead ends: 5920 [2022-11-26 01:20:36,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 75.8s TimeCoverageRelationStatistics Valid=1240, Invalid=2182, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 01:20:36,809 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3426 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 4749 mSolverCounterSat, 113 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 4873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4749 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:36,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 222 Invalid, 4873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4749 Invalid, 11 Unknown, 0 Unchecked, 40.9s Time] [2022-11-26 01:20:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2022-11-26 01:20:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 394. [2022-11-26 01:20:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 390 states have (on average 2.458974358974359) internal successors, (959), 393 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 01:20:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 959 transitions. [2022-11-26 01:20:36,899 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 959 transitions. Word has length 15 [2022-11-26 01:20:36,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:36,899 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 959 transitions. [2022-11-26 01:20:36,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 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) [2022-11-26 01:20:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 959 transitions. [2022-11-26 01:20:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:20:36,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:36,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1] [2022-11-26 01:20:36,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (33)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:37,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:37,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:37,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:20:37,510 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:20:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:37,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1084466405, now seen corresponding path program 2 times [2022-11-26 01:20:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:37,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436475271] [2022-11-26 01:20:37,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:20:37,510 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 01:20:37,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:37,513 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:20:37,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:20:37,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:20:37,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:20:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:20:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:37,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:20:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:38,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:40,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:20:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436475271] [2022-11-26 01:20:40,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436475271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:20:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [832087457] [2022-11-26 01:20:40,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:20:40,398 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:20:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:20:40,402 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:20:40,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-26 01:20:40,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:20:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:20:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:20:40,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:40,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 01:20:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:20:41,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:20:42,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [832087457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:20:42,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424167105] [2022-11-26 01:20:42,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:20:42,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:20:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:20:42,864 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:20:42,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 01:20:43,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:20:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:20:43,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:20:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:20:43,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:20:45,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424167105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:20:45,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:20:45,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 43 [2022-11-26 01:20:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2338053] [2022-11-26 01:20:45,614 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:20:45,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 01:20:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:20:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 01:20:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:20:45,617 INFO L87 Difference]: Start difference. First operand 394 states and 959 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:21:14,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:21:20,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:21:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:21:25,692 INFO L93 Difference]: Finished difference Result 984 states and 2258 transitions. [2022-11-26 01:21:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 01:21:25,693 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 01:21:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:21:25,697 INFO L225 Difference]: With dead ends: 984 [2022-11-26 01:21:25,697 INFO L226 Difference]: Without dead ends: 984 [2022-11-26 01:21:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=765, Invalid=4785, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 01:21:25,699 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1378 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:21:25,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 0 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 19.7s Time] [2022-11-26 01:21:25,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-26 01:21:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 510. [2022-11-26 01:21:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 506 states have (on average 2.472332015810277) internal successors, (1251), 509 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 01:21:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1251 transitions. [2022-11-26 01:21:25,715 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1251 transitions. Word has length 15 [2022-11-26 01:21:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:21:25,716 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 1251 transitions. [2022-11-26 01:21:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:21:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1251 transitions. [2022-11-26 01:21:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 01:21:25,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:21:25,717 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 01:21:25,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-26 01:21:25,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:21:26,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-26 01:21:26,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:21:26,343 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:21:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:21:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash 289452219, now seen corresponding path program 3 times [2022-11-26 01:21:26,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:21:26,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085808518] [2022-11-26 01:21:26,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:21:26,344 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 01:21:26,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:21:26,345 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:21:26,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (39)] Waiting until timeout for monitored process [2022-11-26 01:21:26,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:21:26,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:21:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:21:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:21:26,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2022-11-26 01:21:26,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-26 01:21:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:21:26,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:21:26,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:21:26,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085808518] [2022-11-26 01:21:26,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085808518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:21:26,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:21:26,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:21:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465054980] [2022-11-26 01:21:26,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:21:26,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:21:26,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:21:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:21:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:21:26,962 INFO L87 Difference]: Start difference. First operand 510 states and 1251 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-11-26 01:21:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:21:28,165 INFO L93 Difference]: Finished difference Result 632 states and 1511 transitions. [2022-11-26 01:21:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:21:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 17 [2022-11-26 01:21:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:21:28,169 INFO L225 Difference]: With dead ends: 632 [2022-11-26 01:21:28,169 INFO L226 Difference]: Without dead ends: 600 [2022-11-26 01:21:28,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:21:28,170 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:21:28,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:21:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-26 01:21:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 526. [2022-11-26 01:21:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 522 states have (on average 2.4616858237547894) internal successors, (1285), 525 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states 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 01:21:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1285 transitions. [2022-11-26 01:21:28,192 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1285 transitions. Word has length 17 [2022-11-26 01:21:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:21:28,192 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 1285 transitions. [2022-11-26 01:21:28,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-11-26 01:21:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1285 transitions. [2022-11-26 01:21:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 01:21:28,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:21:28,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:21:28,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (39)] Forceful destruction successful, exit code 0 [2022-11-26 01:21:28,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:21:28,408 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:21:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:21:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1469953510, now seen corresponding path program 1 times [2022-11-26 01:21:28,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:21:28,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683108364] [2022-11-26 01:21:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:21:28,408 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 01:21:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:21:28,409 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:21:28,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:21:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:21:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 01:21:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:21:28,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:21:28,596 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:21:28,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683108364] [2022-11-26 01:21:28,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683108364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:21:28,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:21:28,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:21:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539152692] [2022-11-26 01:21:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:21:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:21:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:21:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:21:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:21:28,598 INFO L87 Difference]: Start difference. First operand 526 states and 1285 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 01:21:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:21:28,800 INFO L93 Difference]: Finished difference Result 679 states and 1708 transitions. [2022-11-26 01:21:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:21:28,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-26 01:21:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:21:28,803 INFO L225 Difference]: With dead ends: 679 [2022-11-26 01:21:28,803 INFO L226 Difference]: Without dead ends: 606 [2022-11-26 01:21:28,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:21:28,804 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:21:28,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:21:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-26 01:21:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 593. [2022-11-26 01:21:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 2.5110356536502545) internal successors, (1479), 592 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states 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 01:21:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1479 transitions. [2022-11-26 01:21:28,818 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1479 transitions. Word has length 17 [2022-11-26 01:21:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:21:28,818 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 1479 transitions. [2022-11-26 01:21:28,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 01:21:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1479 transitions. [2022-11-26 01:21:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 01:21:28,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:21:28,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 01:21:28,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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)] Ended with exit code 0 [2022-11-26 01:21:29,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:21:29,042 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:21:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:21:29,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2066432066, now seen corresponding path program 1 times [2022-11-26 01:21:29,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:21:29,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234865190] [2022-11-26 01:21:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:21:29,042 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 01:21:29,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:21:29,043 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:21:29,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:21:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:21:29,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:21:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:29,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 01:21:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:21:29,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:21:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:21:31,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:21:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234865190] [2022-11-26 01:21:31,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234865190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:21:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2053419914] [2022-11-26 01:21:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:21:31,954 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:21:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:21:31,955 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:21:31,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-26 01:21:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:21:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:21:32,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:21:33,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:21:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:21:35,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2053419914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:21:35,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642741774] [2022-11-26 01:21:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:21:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:21:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:21:35,440 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:21:35,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-26 01:21:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:21:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:21:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:21:36,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:21:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:21:36,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642741774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:21:36,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:21:36,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 11, 11] total 42 [2022-11-26 01:21:36,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616833895] [2022-11-26 01:21:36,968 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:21:36,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 01:21:36,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:21:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 01:21:36,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:21:36,970 INFO L87 Difference]: Start difference. First operand 593 states and 1479 transitions. Second operand has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:21:51,765 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 [] [2022-11-26 01:21:58,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:21:59,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:22:01,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:22:03,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:22:11,605 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 [] [2022-11-26 01:22:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:22:13,768 INFO L93 Difference]: Finished difference Result 1758 states and 4344 transitions. [2022-11-26 01:22:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-26 01:22:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 01:22:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:22:13,772 INFO L225 Difference]: With dead ends: 1758 [2022-11-26 01:22:13,772 INFO L226 Difference]: Without dead ends: 1578 [2022-11-26 01:22:13,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1240, Invalid=6070, Unknown=0, NotChecked=0, Total=7310 [2022-11-26 01:22:13,774 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1793 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 203 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:22:13,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 0 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 3679 Invalid, 5 Unknown, 0 Unchecked, 25.8s Time] [2022-11-26 01:22:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-11-26 01:22:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1082. [2022-11-26 01:22:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1078 states have (on average 2.6855287569573285) internal successors, (2895), 1081 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states 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 01:22:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 2895 transitions. [2022-11-26 01:22:13,801 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 2895 transitions. Word has length 18 [2022-11-26 01:22:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:22:13,801 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 2895 transitions. [2022-11-26 01:22:13,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:22:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 2895 transitions. [2022-11-26 01:22:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 01:22:13,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:22:13,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:22:13,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 [2022-11-26 01:22:14,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:14,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:14,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:22:14,419 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:22:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:22:14,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1927503885, now seen corresponding path program 1 times [2022-11-26 01:22:14,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:22:14,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465473296] [2022-11-26 01:22:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:22:14,422 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 01:22:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:22:14,424 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:22:14,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (44)] Waiting until timeout for monitored process [2022-11-26 01:22:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:22:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 01:22:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:22:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:22:14,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:22:14,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:22:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465473296] [2022-11-26 01:22:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465473296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:22:14,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:22:14,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:22:14,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337698480] [2022-11-26 01:22:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:22:14,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:22:14,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:22:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:22:14,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:22:14,674 INFO L87 Difference]: Start difference. First operand 1082 states and 2895 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:22:15,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:22:15,074 INFO L93 Difference]: Finished difference Result 1241 states and 3308 transitions. [2022-11-26 01:22:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:22:15,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 01:22:15,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:22:15,078 INFO L225 Difference]: With dead ends: 1241 [2022-11-26 01:22:15,078 INFO L226 Difference]: Without dead ends: 1223 [2022-11-26 01:22:15,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:22:15,079 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:22:15,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:22:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-11-26 01:22:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1168. [2022-11-26 01:22:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1164 states have (on average 2.6752577319587627) internal successors, (3114), 1167 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states 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 01:22:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3114 transitions. [2022-11-26 01:22:15,113 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3114 transitions. Word has length 19 [2022-11-26 01:22:15,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:22:15,114 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 3114 transitions. [2022-11-26 01:22:15,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:22:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3114 transitions. [2022-11-26 01:22:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 01:22:15,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:22:15,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:22:15,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (44)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:22:15,333 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:22:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:22:15,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1620371556, now seen corresponding path program 1 times [2022-11-26 01:22:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:22:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29672394] [2022-11-26 01:22:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:22:15,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:22:15,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:22:15,340 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:22:15,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (45)] Waiting until timeout for monitored process [2022-11-26 01:22:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:22:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:22:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:22:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:15,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:22:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:15,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:22:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29672394] [2022-11-26 01:22:15,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29672394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:22:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [404865995] [2022-11-26 01:22:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:22:15,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:22:15,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:22:15,630 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:22:15,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-26 01:22:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:22:15,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:22:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:22:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:15,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:22:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [404865995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:22:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000442724] [2022-11-26 01:22:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:22:16,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:22:16,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:22:16,017 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:22:16,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-26 01:22:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:22:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:22:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:22:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:16,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:22:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:16,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000442724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:22:16,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:22:16,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 5 [2022-11-26 01:22:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486856217] [2022-11-26 01:22:16,268 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:22:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:22:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:22:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:22:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:22:16,269 INFO L87 Difference]: Start difference. First operand 1168 states and 3114 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 01:22:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:22:16,578 INFO L93 Difference]: Finished difference Result 1502 states and 4007 transitions. [2022-11-26 01:22:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:22:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 21 [2022-11-26 01:22:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:22:16,583 INFO L225 Difference]: With dead ends: 1502 [2022-11-26 01:22:16,584 INFO L226 Difference]: Without dead ends: 1502 [2022-11-26 01:22:16,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:22:16,584 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:22:16,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:22:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-11-26 01:22:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1306. [2022-11-26 01:22:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1301 states have (on average 2.6541122213681785) internal successors, (3453), 1305 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states 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 01:22:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 3453 transitions. [2022-11-26 01:22:16,634 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 3453 transitions. Word has length 21 [2022-11-26 01:22:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:22:16,635 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 3453 transitions. [2022-11-26 01:22:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 01:22:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 3453 transitions. [2022-11-26 01:22:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 01:22:16,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:22:16,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:22:16,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (45)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:16,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:17,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:22:17,254 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-26 01:22:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:22:17,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1542723580, now seen corresponding path program 2 times [2022-11-26 01:22:17,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:22:17,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417720833] [2022-11-26 01:22:17,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:22:17,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:22:17,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:22:17,260 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 01:22:17,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b101ae-c7ba-43b5-b1f2-a3c0a7a50acf/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 (48)] Waiting until timeout for monitored process [2022-11-26 01:22:17,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:22:17,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:22:17,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 01:22:17,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:22:17,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:22:17,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:17,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2022-11-26 01:22:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:18,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2022-11-26 01:22:18,860 INFO L321 Elim1Store]: treesize reduction 64, result has 75.7 percent of original size [2022-11-26 01:22:18,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 209 treesize of output 254 [2022-11-26 01:22:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:18,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:22:23,658 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (bvmul (_ bv4 32) c_~i~0))) (let ((.cse1 (bvadd .cse12 (_ bv3 32) c_~A~0.offset)) (.cse2 (bvadd .cse12 (_ bv2 32) c_~A~0.offset)) (.cse3 (bvadd .cse12 c_~A~0.offset (_ bv1 32))) (.cse4 (bvadd .cse12 c_~A~0.offset)) (.cse7 (bvmul (_ bv4 32) c_~end~0))) (and (forall ((v_ArrVal_1528 (Array (_ BitVec 32) (_ BitVec 8))) (~queue~0.offset (_ BitVec 32)) (~queue~0.base (_ BitVec 32))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1528))) (let ((.cse6 (select .cse5 ~queue~0.base))) (or (not (= (let ((.cse0 (select .cse5 c_~A~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))) (concat (concat (concat (select .cse6 (bvadd ~queue~0.offset .cse7 (_ bv3 32))) (select .cse6 (bvadd ~queue~0.offset (_ bv2 32) .cse7))) (select .cse6 (bvadd ~queue~0.offset .cse7 (_ bv1 32)))) (select .cse6 (bvadd ~queue~0.offset .cse7))))) (bvsge c_~v_old~0 (let ((.cse8 (bvmul (_ bv4 32) c_~start~0))) (concat (concat (concat (select .cse6 (bvadd ~queue~0.offset (_ bv3 32) .cse8)) (select .cse6 (bvadd ~queue~0.offset (_ bv2 32) .cse8))) (select .cse6 (bvadd ~queue~0.offset .cse8 (_ bv1 32)))) (select .cse6 (bvadd ~queue~0.offset .cse8))))))))) (or (forall ((v_ArrVal_1528 (Array (_ BitVec 32) (_ BitVec 8))) (~queue~0.offset (_ BitVec 32)) (~queue~0.base (_ BitVec 32))) (not (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1528))) (= (let ((.cse9 (select .cse10 c_~A~0.base))) (concat (concat (concat (select .cse9 .cse1) (select .cse9 .cse2)) (select .cse9 .cse3)) (select .cse9 .cse4))) (let ((.cse11 (select .cse10 ~queue~0.base))) (concat (concat (concat (select .cse11 (bvadd ~queue~0.offset .cse7 (_ bv3 32))) (select .cse11 (bvadd ~queue~0.offset (_ bv2 32) .cse7))) (select .cse11 (bvadd ~queue~0.offset .cse7 (_ bv1 32)))) (select .cse11 (bvadd ~queue~0.offset .cse7)))))))) (not (= c_~ok~0 (_ bv0 8))))))) is different from false [2022-11-26 01:22:23,847 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse13 (bvmul (_ bv4 32) c_~i~0))) (let ((.cse1 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse13 (_ bv3 32))) (.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse13 (_ bv2 32))) (.cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse13 (_ bv1 32))) (.cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse13)) (.cse7 (bvmul (_ bv4 32) c_~end~0))) (and (or (not (= c_~ok~0 (_ bv0 8))) (forall ((v_ArrVal_1528 (Array (_ BitVec 32) (_ BitVec 8))) (~queue~0.offset (_ BitVec 32)) (v_ArrVal_1527 (Array (_ BitVec 32) (_ BitVec 8))) (~queue~0.base (_ BitVec 32))) (not (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1527) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1528))) (= (let ((.cse0 (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))) (let ((.cse6 (select .cse5 ~queue~0.base))) (concat (concat (concat (select .cse6 (bvadd ~queue~0.offset .cse7 (_ bv3 32))) (select .cse6 (bvadd ~queue~0.offset (_ bv2 32) .cse7))) (select .cse6 (bvadd ~queue~0.offset .cse7 (_ bv1 32)))) (select .cse6 (bvadd ~queue~0.offset .cse7))))))))) (forall ((v_ArrVal_1528 (Array (_ BitVec 32) (_ BitVec 8))) (~queue~0.offset (_ BitVec 32)) (v_ArrVal_1527 (Array (_ BitVec 32) (_ BitVec 8))) (~queue~0.base (_ BitVec 32))) (let ((.cse9 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1527) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1528))) (let ((.cse10 (select .cse9 ~queue~0.base))) (or (not (= (let ((.cse8 (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse8 .cse1) (select .cse8 .cse2)) (select .cse8 .cse3)) (select .cse8 .cse4))) (concat (concat (concat (select .cse10 (bvadd ~queue~0.offset .cse7 (_ bv3 32))) (select .cse10 (bvadd ~queue~0.offset (_ bv2 32) .cse7))) (select .cse10 (bvadd ~queue~0.offset .cse7 (_ bv1 32)))) (select .cse10 (bvadd ~queue~0.offset .cse7))))) (bvsge (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse11 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32))) (select .cse11 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32)))) (select .cse11 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32)))) (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse12 (bvmul (_ bv4 32) c_~start~0))) (concat (concat (concat (select .cse10 (bvadd ~queue~0.offset (_ bv3 32) .cse12)) (select .cse10 (bvadd ~queue~0.offset (_ bv2 32) .cse12))) (select .cse10 (bvadd ~queue~0.offset .cse12 (_ bv1 32)))) (select .cse10 (bvadd ~queue~0.offset .cse12)))))))))))) is different from false [2022-11-26 01:22:23,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:22:23,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2582 treesize of output 2442 [2022-11-26 01:22:24,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:22:24,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1162 treesize of output 1215 [2022-11-26 01:22:24,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:22:24,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 946 treesize of output 783 [2022-11-26 01:22:24,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 514 treesize of output 406 [2022-11-26 01:22:27,057 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-26 01:22:27,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 3108 treesize of output 2981 [2022-11-26 01:22:30,530 INFO L321 Elim1Store]: treesize reduction 168, result has 77.7 percent of original size [2022-11-26 01:22:30,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 2933 treesize of output 2545 [2022-11-26 01:22:30,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:30,928 INFO L217 Elim1Store]: Index analysis took 307 ms [2022-11-26 01:22:32,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:22:32,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 30 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 1961 treesize of output 2059 [2022-11-26 01:22:32,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:32,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:33,376 INFO L217 Elim1Store]: Index analysis took 648 ms [2022-11-26 01:22:37,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:22:37,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 48 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 72 case distinctions, treesize of input 1475 treesize of output 2056