./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.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_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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_3cc0f31e-4341-44c1-babd-26213b46323a/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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:36:09,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:36:09,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:36:09,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:36:09,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:36:09,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:36:09,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:36:09,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:36:09,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:36:09,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:36:09,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:36:09,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:36:09,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:36:09,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:36:09,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:36:09,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:36:09,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:36:09,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:36:09,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:36:09,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:36:09,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:36:09,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:36:09,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:36:09,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:36:09,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:36:09,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:36:09,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:36:09,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:36:09,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:36:09,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:36:09,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:36:09,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:36:09,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:36:09,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:36:09,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:36:09,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:36:09,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:36:09,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:36:09,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:36:09,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:36:09,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:36:09,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:36:09,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:36:09,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:36:09,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:36:09,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:36:09,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:36:09,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:36:09,139 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:36:09,140 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:36:09,140 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:36:09,140 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:36:09,140 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:36:09,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:36:09,141 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:36:09,141 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:36:09,141 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:36:09,141 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:36:09,142 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:36:09,142 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:36:09,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:36:09,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:36:09,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:36:09,143 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:36:09,143 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:36:09,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:36:09,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:36:09,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:36:09,144 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:36:09,144 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:36:09,145 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:36:09,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:36:09,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:36:09,145 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:36:09,146 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:36:09,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:36:09,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:36:09,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:36:09,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:36:09,147 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:36:09,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:36:09,147 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:36:09,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:36:09,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:36:09,148 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_3cc0f31e-4341-44c1-babd-26213b46323a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-11-25 23:36:09,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:36:09,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:36:09,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:36:09,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:36:09,458 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:36:09,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-25 23:36:12,623 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:36:12,873 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:36:12,873 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-25 23:36:12,886 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data/7713753c0/c1bd0ff594fa4947910966e9139164d9/FLAG2ad48c271 [2022-11-25 23:36:12,905 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data/7713753c0/c1bd0ff594fa4947910966e9139164d9 [2022-11-25 23:36:12,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:36:12,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:36:12,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:36:12,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:36:12,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:36:12,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:36:12" (1/1) ... [2022-11-25 23:36:12,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77dc81a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:12, skipping insertion in model container [2022-11-25 23:36:12,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:36:12" (1/1) ... [2022-11-25 23:36:12,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:36:12,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:36:13,251 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_3cc0f31e-4341-44c1-babd-26213b46323a/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-25 23:36:13,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:36:13,300 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 23:36:13,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3aa2336a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:13, skipping insertion in model container [2022-11-25 23:36:13,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:36:13,301 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 23:36:13,304 INFO L158 Benchmark]: Toolchain (without parser) took 387.68ms. Allocated memory is still 159.4MB. Free memory was 119.2MB in the beginning and 108.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:36:13,305 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 107.0MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:36:13,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.83ms. Allocated memory is still 159.4MB. Free memory was 118.6MB in the beginning and 108.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:36:13,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 107.0MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.83ms. Allocated memory is still 159.4MB. Free memory was 118.6MB in the beginning and 108.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 117]: 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_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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_3cc0f31e-4341-44c1-babd-26213b46323a/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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:36:15,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:36:15,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:36:15,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:36:15,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:36:15,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:36:15,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:36:15,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:36:15,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:36:15,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:36:15,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:36:15,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:36:15,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:36:15,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:36:15,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:36:15,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:36:15,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:36:15,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:36:15,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:36:15,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:36:15,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:36:15,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:36:15,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:36:15,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:36:15,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:36:15,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:36:15,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:36:15,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:36:15,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:36:15,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:36:15,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:36:15,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:36:15,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:36:15,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:36:15,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:36:15,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:36:15,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:36:15,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:36:15,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:36:15,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:36:15,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:36:15,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 23:36:16,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:36:16,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:36:16,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:36:16,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:36:16,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:36:16,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:36:16,017 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:36:16,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:36:16,018 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:36:16,018 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:36:16,019 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:36:16,019 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:36:16,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:36:16,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:36:16,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:36:16,021 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:36:16,021 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:36:16,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:36:16,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:36:16,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:36:16,022 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:36:16,022 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:36:16,022 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:36:16,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:36:16,023 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:36:16,023 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:36:16,023 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:36:16,023 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:36:16,024 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:36:16,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:36:16,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:36:16,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:36:16,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:36:16,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:36:16,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:36:16,025 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:36:16,026 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:36:16,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:36:16,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:36:16,026 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_3cc0f31e-4341-44c1-babd-26213b46323a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-11-25 23:36:16,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:36:16,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:36:16,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:36:16,474 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:36:16,476 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:36:16,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-25 23:36:19,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:36:19,809 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:36:19,811 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-25 23:36:19,826 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data/e2c5ada10/5376dc56fd7341858eea0f068830e030/FLAG13d048d87 [2022-11-25 23:36:19,856 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/data/e2c5ada10/5376dc56fd7341858eea0f068830e030 [2022-11-25 23:36:19,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:36:19,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:36:19,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:36:19,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:36:19,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:36:19,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:36:19" (1/1) ... [2022-11-25 23:36:19,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e37f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:19, skipping insertion in model container [2022-11-25 23:36:19,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:36:19" (1/1) ... [2022-11-25 23:36:19,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:36:19,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:36:20,220 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_3cc0f31e-4341-44c1-babd-26213b46323a/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-25 23:36:20,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:36:20,278 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 23:36:20,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:36:20,324 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_3cc0f31e-4341-44c1-babd-26213b46323a/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-25 23:36:20,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:36:20,349 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:36:20,393 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_3cc0f31e-4341-44c1-babd-26213b46323a/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-25 23:36:20,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:36:20,430 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:36:20,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20 WrapperNode [2022-11-25 23:36:20,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:36:20,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:36:20,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:36:20,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:36:20,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,505 INFO L138 Inliner]: procedures = 28, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 268 [2022-11-25 23:36:20,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:36:20,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:36:20,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:36:20,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:36:20,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:36:20,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:36:20,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:36:20,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:36:20,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (1/1) ... [2022-11-25 23:36:20,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:36:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:20,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:36:20,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:36:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:36:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:36:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:36:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 23:36:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:36:20,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:36:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:36:20,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:36:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:36:20,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:36:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:36:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:36:20,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:36:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:36:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 23:36:20,683 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:36:20,877 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:36:20,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:36:21,919 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:36:21,930 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:36:21,930 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 23:36:21,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:36:21 BoogieIcfgContainer [2022-11-25 23:36:21,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:36:21,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:36:21,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:36:21,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:36:21,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:36:19" (1/3) ... [2022-11-25 23:36:21,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d03df60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:36:21, skipping insertion in model container [2022-11-25 23:36:21,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:20" (2/3) ... [2022-11-25 23:36:21,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d03df60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:36:21, skipping insertion in model container [2022-11-25 23:36:21,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:36:21" (3/3) ... [2022-11-25 23:36:21,947 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2022-11-25 23:36:21,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:36:21,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-25 23:36:21,970 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:36:22,183 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 23:36:22,242 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:36:22,266 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 369 places, 387 transitions, 798 flow [2022-11-25 23:36:22,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 369 places, 387 transitions, 798 flow [2022-11-25 23:36:22,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 387 transitions, 798 flow [2022-11-25 23:36:22,514 INFO L130 PetriNetUnfolder]: 28/384 cut-off events. [2022-11-25 23:36:22,514 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 23:36:22,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 384 events. 28/384 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 843 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 290. Up to 3 conditions per place. [2022-11-25 23:36:22,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 25650 [2022-11-25 23:37:22,584 INFO L134 LiptonReduction]: Checked pairs total: 38370 [2022-11-25 23:37:22,585 INFO L136 LiptonReduction]: Total number of compositions: 459 [2022-11-25 23:37:22,593 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 83 transitions, 190 flow [2022-11-25 23:37:23,138 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:23,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:37:23,175 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;@4fd2c72b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:37:23,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-25 23:37:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:37:23,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:23,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:37:23,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:23,230 INFO L85 PathProgramCache]: Analyzing trace with hash 49609, now seen corresponding path program 1 times [2022-11-25 23:37:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:23,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059091675] [2022-11-25 23:37:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:23,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:23,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:23,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 23:37:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:37:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:23,689 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:37:23,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:37:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:23,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:37:23,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059091675] [2022-11-25 23:37:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059091675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:37:23,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:37:23,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:37:23,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333915816] [2022-11-25 23:37:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:37:23,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:37:23,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:23,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:37:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:37:23,828 INFO L87 Difference]: Start difference. First operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:24,598 INFO L93 Difference]: Finished difference Result 6760 states and 25219 transitions. [2022-11-25 23:37:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:37:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:37:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:24,724 INFO L225 Difference]: With dead ends: 6760 [2022-11-25 23:37:24,738 INFO L226 Difference]: Without dead ends: 6760 [2022-11-25 23:37:24,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:37:24,746 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:24,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:37:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2022-11-25 23:37:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6760. [2022-11-25 23:37:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 5260 states have (on average 4.794486692015209) internal successors, (25219), 6759 states have internal predecessors, (25219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 25219 transitions. [2022-11-25 23:37:25,435 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 25219 transitions. Word has length 2 [2022-11-25 23:37:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:25,437 INFO L495 AbstractCegarLoop]: Abstraction has 6760 states and 25219 transitions. [2022-11-25 23:37:25,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 25219 transitions. [2022-11-25 23:37:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:37:25,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:25,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:37:25,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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)] Ended with exit code 0 [2022-11-25 23:37:25,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:25,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:25,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash 49610, now seen corresponding path program 1 times [2022-11-25 23:37:25,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537001952] [2022-11-25 23:37:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:25,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:25,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:25,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 23:37:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:37:25,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:25,999 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:37:25,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:37:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:26,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:37:26,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537001952] [2022-11-25 23:37:26,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537001952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:37:26,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:37:26,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:37:26,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498669936] [2022-11-25 23:37:26,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:37:26,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:37:26,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:26,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:37:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:37:26,048 INFO L87 Difference]: Start difference. First operand 6760 states and 25219 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:27,422 INFO L93 Difference]: Finished difference Result 13516 states and 50434 transitions. [2022-11-25 23:37:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:37:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:37:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:27,709 INFO L225 Difference]: With dead ends: 13516 [2022-11-25 23:37:27,710 INFO L226 Difference]: Without dead ends: 13516 [2022-11-25 23:37:27,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:37:27,717 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:27,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:37:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13516 states. [2022-11-25 23:37:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13516 to 6763. [2022-11-25 23:37:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5263 states have (on average 4.793273798213947) internal successors, (25227), 6762 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 25227 transitions. [2022-11-25 23:37:28,242 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 25227 transitions. Word has length 2 [2022-11-25 23:37:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:28,243 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 25227 transitions. [2022-11-25 23:37:28,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 25227 transitions. [2022-11-25 23:37:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:37:28,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:28,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:37:28,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:28,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1546383, now seen corresponding path program 1 times [2022-11-25 23:37:28,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:28,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382862997] [2022-11-25 23:37:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:28,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:28,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:28,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 23:37:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:28,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:37:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:28,731 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:37:28,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:37:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:28,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:29,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:29,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382862997] [2022-11-25 23:37:29,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382862997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:29,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031890829] [2022-11-25 23:37:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:29,075 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:37:29,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:37:29,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:37:29,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-25 23:37:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:37:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:29,506 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:37:29,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:37:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:29,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:29,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031890829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:29,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680903210] [2022-11-25 23:37:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:29,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:29,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:29,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:29,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:37:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:37:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:29,948 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:37:29,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:37:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:30,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680903210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:30,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:37:30,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-25 23:37:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442292998] [2022-11-25 23:37:30,180 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:30,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:37:30,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:37:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:37:30,181 INFO L87 Difference]: Start difference. First operand 6763 states and 25227 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) [2022-11-25 23:37:32,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:37:33,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:37:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:36,804 INFO L93 Difference]: Finished difference Result 27031 states and 100872 transitions. [2022-11-25 23:37:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:37:36,805 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 [2022-11-25 23:37:36,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:37,025 INFO L225 Difference]: With dead ends: 27031 [2022-11-25 23:37:37,025 INFO L226 Difference]: Without dead ends: 27031 [2022-11-25 23:37:37,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:37:37,030 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 617 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:37,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 0 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-25 23:37:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27031 states. [2022-11-25 23:37:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27031 to 6772. [2022-11-25 23:37:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 5272 states have (on average 4.789643399089529) internal successors, (25251), 6771 states have internal predecessors, (25251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 25251 transitions. [2022-11-25 23:37:37,717 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 25251 transitions. Word has length 3 [2022-11-25 23:37:37,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:37,717 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 25251 transitions. [2022-11-25 23:37:37,718 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) [2022-11-25 23:37:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 25251 transitions. [2022-11-25 23:37:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:37:37,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:37,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:37:37,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:37,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:38,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:38,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:38,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:38,343 INFO L85 PathProgramCache]: Analyzing trace with hash 47989007, now seen corresponding path program 1 times [2022-11-25 23:37:38,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:38,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174937493] [2022-11-25 23:37:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:38,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:38,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:38,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 23:37:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:38,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:37:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:38,597 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-25 23:37:38,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 23:37:39,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:39,095 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:37:39,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-25 23:37:39,473 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-25 23:37:39,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-25 23:37:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:39,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:37:39,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:39,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174937493] [2022-11-25 23:37:39,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174937493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:37:39,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:37:39,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:37:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769024268] [2022-11-25 23:37:39,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:37:39,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:37:39,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:37:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:39,981 INFO L87 Difference]: Start difference. First operand 6772 states and 25251 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-25 23:37:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:40,757 INFO L93 Difference]: Finished difference Result 5399 states and 19562 transitions. [2022-11-25 23:37:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:37:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-25 23:37:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:40,784 INFO L225 Difference]: With dead ends: 5399 [2022-11-25 23:37:40,784 INFO L226 Difference]: Without dead ends: 5399 [2022-11-25 23:37:40,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:40,786 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:40,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:37:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-11-25 23:37:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5399. [2022-11-25 23:37:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 4305 states have (on average 4.544018583042973) internal successors, (19562), 5398 states have internal predecessors, (19562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 19562 transitions. [2022-11-25 23:37:41,046 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 19562 transitions. Word has length 4 [2022-11-25 23:37:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:41,046 INFO L495 AbstractCegarLoop]: Abstraction has 5399 states and 19562 transitions. [2022-11-25 23:37:41,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-25 23:37:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 19562 transitions. [2022-11-25 23:37:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:37:41,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:41,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:37:41,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-25 23:37:41,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:41,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:41,262 INFO L85 PathProgramCache]: Analyzing trace with hash 47989009, now seen corresponding path program 1 times [2022-11-25 23:37:41,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:41,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358819653] [2022-11-25 23:37:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:41,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:41,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:41,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:37:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:37:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:41,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:41,552 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 23:37:41,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 23:37:41,592 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 23:37:41,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-11-25 23:37:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:41,671 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 [2022-11-25 23:37:41,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:41,712 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 [2022-11-25 23:37:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:41,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:37:41,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:41,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358819653] [2022-11-25 23:37:41,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358819653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:37:41,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:37:41,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:37:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085467357] [2022-11-25 23:37:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:37:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:37:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:37:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:41,746 INFO L87 Difference]: Start difference. First operand 5399 states and 19562 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-25 23:37:42,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:42,246 INFO L93 Difference]: Finished difference Result 4026 states and 13873 transitions. [2022-11-25 23:37:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:37:42,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-25 23:37:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:42,263 INFO L225 Difference]: With dead ends: 4026 [2022-11-25 23:37:42,263 INFO L226 Difference]: Without dead ends: 4026 [2022-11-25 23:37:42,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:42,264 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:42,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:37:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-11-25 23:37:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4026. [2022-11-25 23:37:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3338 states have (on average 4.156081485919713) internal successors, (13873), 4025 states have internal predecessors, (13873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13873 transitions. [2022-11-25 23:37:42,425 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13873 transitions. Word has length 4 [2022-11-25 23:37:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:42,425 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 13873 transitions. [2022-11-25 23:37:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-25 23:37:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13873 transitions. [2022-11-25 23:37:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:37:42,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:42,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:37:42,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:42,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:42,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1127169160, now seen corresponding path program 1 times [2022-11-25 23:37:42,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:42,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314101374] [2022-11-25 23:37:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:42,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:42,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:42,638 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:42,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:37:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:37:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:42,879 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-25 23:37:42,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-25 23:37:43,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:43,066 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 20 [2022-11-25 23:37:43,143 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:37:43,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:37:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:43,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:37:43,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314101374] [2022-11-25 23:37:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314101374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:37:43,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:37:43,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:37:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550917014] [2022-11-25 23:37:43,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:37:43,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:37:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:37:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:43,208 INFO L87 Difference]: Start difference. First operand 4026 states and 13873 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) [2022-11-25 23:37:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:43,797 INFO L93 Difference]: Finished difference Result 3914 states and 13543 transitions. [2022-11-25 23:37:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:37:43,798 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 [2022-11-25 23:37:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:43,808 INFO L225 Difference]: With dead ends: 3914 [2022-11-25 23:37:43,808 INFO L226 Difference]: Without dead ends: 3914 [2022-11-25 23:37:43,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:43,809 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:43,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:37:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-25 23:37:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3914. [2022-11-25 23:37:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3280 states have (on average 4.128963414634146) internal successors, (13543), 3913 states have internal predecessors, (13543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 13543 transitions. [2022-11-25 23:37:43,916 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 13543 transitions. Word has length 6 [2022-11-25 23:37:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:43,916 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 13543 transitions. [2022-11-25 23:37:43,916 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) [2022-11-25 23:37:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 13543 transitions. [2022-11-25 23:37:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:37:43,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:43,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:37:43,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:37:44,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:44,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1127169159, now seen corresponding path program 1 times [2022-11-25 23:37:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:44,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203761978] [2022-11-25 23:37:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:44,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:44,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:44,120 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:44,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 23:37:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:37:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:44,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:44,364 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-25 23:37:44,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-25 23:37:44,382 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 [2022-11-25 23:37:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:44,454 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 [2022-11-25 23:37:44,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:44,480 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 [2022-11-25 23:37:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:44,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:37:44,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203761978] [2022-11-25 23:37:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203761978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:37:44,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:37:44,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:37:44,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559014117] [2022-11-25 23:37:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:37:44,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:37:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:37:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:44,547 INFO L87 Difference]: Start difference. First operand 3914 states and 13543 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) [2022-11-25 23:37:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:44,975 INFO L93 Difference]: Finished difference Result 3802 states and 13213 transitions. [2022-11-25 23:37:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:37:44,976 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 [2022-11-25 23:37:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:44,987 INFO L225 Difference]: With dead ends: 3802 [2022-11-25 23:37:44,988 INFO L226 Difference]: Without dead ends: 3802 [2022-11-25 23:37:44,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:37:44,988 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:44,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:37:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-11-25 23:37:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3802. [2022-11-25 23:37:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3222 states have (on average 4.100869025450031) internal successors, (13213), 3801 states have internal predecessors, (13213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 13213 transitions. [2022-11-25 23:37:45,097 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 13213 transitions. Word has length 6 [2022-11-25 23:37:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:45,097 INFO L495 AbstractCegarLoop]: Abstraction has 3802 states and 13213 transitions. [2022-11-25 23:37:45,097 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) [2022-11-25 23:37:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 13213 transitions. [2022-11-25 23:37:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:37:45,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:45,098 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-25 23:37:45,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:45,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:45,311 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:37:45,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1167930614, now seen corresponding path program 2 times [2022-11-25 23:37:45,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:37:45,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641770909] [2022-11-25 23:37:45,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:37:45,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:37:45,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:37:45,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:37:45,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:37:45,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:37:45,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:37:45,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:45,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:37:45,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:37:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:45,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:46,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:37:46,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641770909] [2022-11-25 23:37:46,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641770909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:46,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1579872183] [2022-11-25 23:37:46,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:37:46,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:37:46,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:37:46,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:37:46,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-25 23:37:46,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:37:46,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:37:46,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:47,026 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:37:47,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:37:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:47,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:47,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1579872183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878340666] [2022-11-25 23:37:47,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:37:47,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:47,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:47,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:37:47,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:37:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:37:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:47,664 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:37:47,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:37:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:47,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:37:47,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878340666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:47,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:37:47,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-25 23:37:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865489891] [2022-11-25 23:37:47,925 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:37:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:37:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:37:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:37:47,926 INFO L87 Difference]: Start difference. First operand 3802 states and 13213 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:51,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:37:53,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:37:55,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:37:57,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:37:59,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:01,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:03,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:05,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:07,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:10,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:13,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:19,718 INFO L93 Difference]: Finished difference Result 34083 states and 118676 transitions. [2022-11-25 23:38:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:38:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:38:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:19,863 INFO L225 Difference]: With dead ends: 34083 [2022-11-25 23:38:19,863 INFO L226 Difference]: Without dead ends: 34083 [2022-11-25 23:38:19,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:38:19,864 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1188 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 101 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:19,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 0 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1854 Invalid, 7 Unknown, 0 Unchecked, 29.6s Time] [2022-11-25 23:38:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34083 states. [2022-11-25 23:38:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34083 to 3814. [2022-11-25 23:38:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3234 states have (on average 4.093382807668522) internal successors, (13238), 3813 states have internal predecessors, (13238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 13238 transitions. [2022-11-25 23:38:20,368 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 13238 transitions. Word has length 6 [2022-11-25 23:38:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:20,369 INFO L495 AbstractCegarLoop]: Abstraction has 3814 states and 13238 transitions. [2022-11-25 23:38:20,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 13238 transitions. [2022-11-25 23:38:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:38:20,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:20,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:20,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:20,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-11-25 23:38:20,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:38:20,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:20,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:38:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:20,978 INFO L85 PathProgramCache]: Analyzing trace with hash -582511209, now seen corresponding path program 1 times [2022-11-25 23:38:20,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:38:20,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415916580] [2022-11-25 23:38:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:20,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:38:20,980 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:38:20,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 23:38:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:21,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:38:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:21,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:21,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:38:21,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415916580] [2022-11-25 23:38:21,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415916580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:21,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:21,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:38:21,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577752919] [2022-11-25 23:38:21,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:21,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:38:21,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:38:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:38:21,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:21,171 INFO L87 Difference]: Start difference. First operand 3814 states and 13238 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:22,293 INFO L93 Difference]: Finished difference Result 4821 states and 16308 transitions. [2022-11-25 23:38:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:38:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:38:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:22,307 INFO L225 Difference]: With dead ends: 4821 [2022-11-25 23:38:22,307 INFO L226 Difference]: Without dead ends: 4821 [2022-11-25 23:38:22,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:22,308 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:22,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:38:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2022-11-25 23:38:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 4339. [2022-11-25 23:38:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 3759 states have (on average 3.997339718010109) internal successors, (15026), 4338 states have internal predecessors, (15026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 15026 transitions. [2022-11-25 23:38:22,447 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 15026 transitions. Word has length 7 [2022-11-25 23:38:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:22,447 INFO L495 AbstractCegarLoop]: Abstraction has 4339 states and 15026 transitions. [2022-11-25 23:38:22,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 15026 transitions. [2022-11-25 23:38:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:38:22,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:22,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:22,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:22,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:22,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:38:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:22,662 INFO L85 PathProgramCache]: Analyzing trace with hash -877770795, now seen corresponding path program 1 times [2022-11-25 23:38:22,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:38:22,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730682151] [2022-11-25 23:38:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:22,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:38:22,663 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:38:22,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 23:38:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:38:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:22,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:22,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:22,917 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 23:38:22,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 23:38:22,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 23:38:22,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:22,991 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 [2022-11-25 23:38:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:23,042 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 [2022-11-25 23:38:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:23,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:23,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:38:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730682151] [2022-11-25 23:38:23,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730682151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:23,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:23,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:38:23,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107874467] [2022-11-25 23:38:23,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:23,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:38:23,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:38:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:38:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:23,156 INFO L87 Difference]: Start difference. First operand 4339 states and 15026 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:23,631 INFO L93 Difference]: Finished difference Result 4108 states and 14310 transitions. [2022-11-25 23:38:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:38:23,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:38:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:23,648 INFO L225 Difference]: With dead ends: 4108 [2022-11-25 23:38:23,649 INFO L226 Difference]: Without dead ends: 4108 [2022-11-25 23:38:23,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:23,649 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 170 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:23,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:38:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2022-11-25 23:38:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 4108. [2022-11-25 23:38:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 3614 states have (on average 3.9596015495296073) internal successors, (14310), 4107 states have internal predecessors, (14310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 14310 transitions. [2022-11-25 23:38:23,808 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 14310 transitions. Word has length 8 [2022-11-25 23:38:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:23,809 INFO L495 AbstractCegarLoop]: Abstraction has 4108 states and 14310 transitions. [2022-11-25 23:38:23,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 14310 transitions. [2022-11-25 23:38:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:38:23,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:23,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:23,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:24,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:24,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:38:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash -877770794, now seen corresponding path program 1 times [2022-11-25 23:38:24,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:38:24,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379837283] [2022-11-25 23:38:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:24,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:24,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:38:24,032 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:38:24,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 23:38:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:38:24,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:24,256 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 23:38:24,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-25 23:38:24,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:24,307 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 20 [2022-11-25 23:38:24,352 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:38:24,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:38:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:24,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:24,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:38:24,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379837283] [2022-11-25 23:38:24,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379837283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:24,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:24,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:38:24,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044929468] [2022-11-25 23:38:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:24,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:38:24,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:38:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:38:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:38:24,425 INFO L87 Difference]: Start difference. First operand 4108 states and 14310 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:24,961 INFO L93 Difference]: Finished difference Result 3877 states and 13594 transitions. [2022-11-25 23:38:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:38:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:38:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:24,977 INFO L225 Difference]: With dead ends: 3877 [2022-11-25 23:38:24,977 INFO L226 Difference]: Without dead ends: 3877 [2022-11-25 23:38:24,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:24,978 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:24,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:38:24,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2022-11-25 23:38:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 3877. [2022-11-25 23:38:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 3469 states have (on average 3.918708561545114) internal successors, (13594), 3876 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 13594 transitions. [2022-11-25 23:38:25,069 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 13594 transitions. Word has length 8 [2022-11-25 23:38:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:25,069 INFO L495 AbstractCegarLoop]: Abstraction has 3877 states and 13594 transitions. [2022-11-25 23:38:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 13594 transitions. [2022-11-25 23:38:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:38:25,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:25,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:25,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:25,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:38:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash -130993678, now seen corresponding path program 1 times [2022-11-25 23:38:25,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:38:25,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450743845] [2022-11-25 23:38:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:25,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:25,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:38:25,285 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:38:25,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 23:38:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:38:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:38:25,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:25,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:38:25,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450743845] [2022-11-25 23:38:25,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450743845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:25,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:25,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:38:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906216571] [2022-11-25 23:38:25,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:25,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:38:25,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:38:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:38:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:25,496 INFO L87 Difference]: Start difference. First operand 3877 states and 13594 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:26,566 INFO L93 Difference]: Finished difference Result 5236 states and 17982 transitions. [2022-11-25 23:38:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:38:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:38:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:26,586 INFO L225 Difference]: With dead ends: 5236 [2022-11-25 23:38:26,586 INFO L226 Difference]: Without dead ends: 5236 [2022-11-25 23:38:26,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:26,587 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:26,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:38:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2022-11-25 23:38:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 3877. [2022-11-25 23:38:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 3469 states have (on average 3.918708561545114) internal successors, (13594), 3876 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 13594 transitions. [2022-11-25 23:38:26,698 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 13594 transitions. Word has length 8 [2022-11-25 23:38:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:26,698 INFO L495 AbstractCegarLoop]: Abstraction has 3877 states and 13594 transitions. [2022-11-25 23:38:26,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 13594 transitions. [2022-11-25 23:38:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:38:26,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:26,700 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1] [2022-11-25 23:38:26,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-25 23:38:26,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:26,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:38:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash -480685408, now seen corresponding path program 1 times [2022-11-25 23:38:26,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:38:26,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60376384] [2022-11-25 23:38:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:26,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:38:26,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:38:26,905 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:38:26,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 23:38:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:27,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:38:27,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:27,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:38:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:27,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:28,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:38:28,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60376384] [2022-11-25 23:38:28,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60376384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:38:28,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357934267] [2022-11-25 23:38:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:28,901 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:38:28,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:38:28,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:38:28,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-25 23:38:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:38:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:29,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:38:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:29,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:30,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357934267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:38:30,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545294519] [2022-11-25 23:38:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:30,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:30,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:30,151 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:30,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:38:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:38:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:30,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:38:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:30,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:30,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545294519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:38:30,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:38:30,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2022-11-25 23:38:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444890358] [2022-11-25 23:38:30,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:38:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:38:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:38:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:38:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:30,816 INFO L87 Difference]: Start difference. First operand 3877 states and 13594 transitions. Second operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:35,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:37,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:39,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:41,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:43,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:45,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:50,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:52,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:54,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:56,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:38:58,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:39:00,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:39:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:11,029 INFO L93 Difference]: Finished difference Result 34533 states and 121624 transitions. [2022-11-25 23:39:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:39:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:39:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:11,173 INFO L225 Difference]: With dead ends: 34533 [2022-11-25 23:39:11,173 INFO L226 Difference]: Without dead ends: 34533 [2022-11-25 23:39:11,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:39:11,174 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2698 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4049 mSolverCounterSat, 180 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4049 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:11,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2698 Valid, 0 Invalid, 4241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4049 Invalid, 12 Unknown, 0 Unchecked, 35.8s Time] [2022-11-25 23:39:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34533 states. [2022-11-25 23:39:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34533 to 3893. [2022-11-25 23:39:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3485 states have (on average 3.909325681492109) internal successors, (13624), 3892 states have internal predecessors, (13624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 13624 transitions. [2022-11-25 23:39:11,563 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 13624 transitions. Word has length 9 [2022-11-25 23:39:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:11,564 INFO L495 AbstractCegarLoop]: Abstraction has 3893 states and 13624 transitions. [2022-11-25 23:39:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 13624 transitions. [2022-11-25 23:39:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:39:11,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:11,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:11,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:11,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:11,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:12,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:12,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:39:12,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1441095955, now seen corresponding path program 1 times [2022-11-25 23:39:12,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:39:12,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574399468] [2022-11-25 23:39:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:12,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:39:12,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:39:12,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:39:12,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 23:39:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:39:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:39:12,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:39:12,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:39:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574399468] [2022-11-25 23:39:12,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574399468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:12,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:39:12,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:39:12,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205475547] [2022-11-25 23:39:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:39:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:39:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:39:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:39:12,390 INFO L87 Difference]: Start difference. First operand 3893 states and 13624 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:13,215 INFO L93 Difference]: Finished difference Result 4112 states and 14195 transitions. [2022-11-25 23:39:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:39:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:39:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:13,227 INFO L225 Difference]: With dead ends: 4112 [2022-11-25 23:39:13,228 INFO L226 Difference]: Without dead ends: 4112 [2022-11-25 23:39:13,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:39:13,228 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:13,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:39:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2022-11-25 23:39:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 4033. [2022-11-25 23:39:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 3625 states have (on average 3.872) internal successors, (14036), 4032 states have internal predecessors, (14036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14036 transitions. [2022-11-25 23:39:13,302 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14036 transitions. Word has length 9 [2022-11-25 23:39:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:13,302 INFO L495 AbstractCegarLoop]: Abstraction has 4033 states and 14036 transitions. [2022-11-25 23:39:13,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14036 transitions. [2022-11-25 23:39:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:39:13,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:13,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:13,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:13,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:39:13,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:39:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -942357036, now seen corresponding path program 1 times [2022-11-25 23:39:13,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:39:13,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481276197] [2022-11-25 23:39:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:13,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:39:13,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:39:13,513 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:39:13,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:39:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:39:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:13,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:39:13,730 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:39:13,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:39:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:39:13,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:39:13,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:39:13,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481276197] [2022-11-25 23:39:13,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481276197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:13,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:39:13,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:39:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293288145] [2022-11-25 23:39:13,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:13,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:39:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:39:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:39:13,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:39:13,754 INFO L87 Difference]: Start difference. First operand 4033 states and 14036 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:14,166 INFO L93 Difference]: Finished difference Result 3105 states and 10800 transitions. [2022-11-25 23:39:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:39:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:39:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:14,175 INFO L225 Difference]: With dead ends: 3105 [2022-11-25 23:39:14,175 INFO L226 Difference]: Without dead ends: 3105 [2022-11-25 23:39:14,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:39:14,176 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:14,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:39:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2022-11-25 23:39:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 3105. [2022-11-25 23:39:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 2857 states have (on average 3.7801890094504724) internal successors, (10800), 3104 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 10800 transitions. [2022-11-25 23:39:14,231 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 10800 transitions. Word has length 9 [2022-11-25 23:39:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:14,231 INFO L495 AbstractCegarLoop]: Abstraction has 3105 states and 10800 transitions. [2022-11-25 23:39:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 10800 transitions. [2022-11-25 23:39:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:39:14,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:14,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:14,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:39:14,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:39:14,433 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:39:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash -942357116, now seen corresponding path program 1 times [2022-11-25 23:39:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:39:14,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852008216] [2022-11-25 23:39:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:14,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:39:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:39:14,435 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:39:14,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:39:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:39:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:14,734 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:39:14,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:39:14,770 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:39:14,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:39:14,796 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:39:14,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 23:39:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:39:14,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:39:14,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:39:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852008216] [2022-11-25 23:39:14,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852008216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:14,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:39:14,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:39:14,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020443963] [2022-11-25 23:39:14,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:14,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:39:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:39:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:39:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:39:14,817 INFO L87 Difference]: Start difference. First operand 3105 states and 10800 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:15,212 INFO L93 Difference]: Finished difference Result 2387 states and 8256 transitions. [2022-11-25 23:39:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:39:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:39:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:15,219 INFO L225 Difference]: With dead ends: 2387 [2022-11-25 23:39:15,219 INFO L226 Difference]: Without dead ends: 2387 [2022-11-25 23:39:15,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:39:15,219 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:15,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:39:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-11-25 23:39:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2387. [2022-11-25 23:39:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2244 states have (on average 3.679144385026738) internal successors, (8256), 2386 states have internal predecessors, (8256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8256 transitions. [2022-11-25 23:39:15,262 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8256 transitions. Word has length 9 [2022-11-25 23:39:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:15,263 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 8256 transitions. [2022-11-25 23:39:15,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8256 transitions. [2022-11-25 23:39:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:39:15,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:15,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:15,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:39:15,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:39:15,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:39:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -942357115, now seen corresponding path program 1 times [2022-11-25 23:39:15,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:39:15,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542980853] [2022-11-25 23:39:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:15,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:39:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:39:15,466 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:39:15,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 23:39:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:15,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:39:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:15,848 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:39:15,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:39:15,985 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:39:15,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:39:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:39:16,135 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:39:16,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:39:16,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:39:16,226 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:39:16,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:39:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:16,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:19,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:39:19,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542980853] [2022-11-25 23:39:19,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542980853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:19,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1276958272] [2022-11-25 23:39:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:19,399 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:39:19,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:39:19,400 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:39:19,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-25 23:39:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:39:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:19,887 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:39:19,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:39:20,044 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:39:20,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:39:20,267 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:39:20,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:39:20,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:39:20,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:20,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:39:20,365 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:39:20,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:39:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:20,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:21,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1276958272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:21,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454069387] [2022-11-25 23:39:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:21,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:21,103 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:21,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 23:39:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:39:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:21,422 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:39:21,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:39:21,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:21,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:39:21,615 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:39:21,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 23:39:21,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:21,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:39:21,706 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:39:21,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:39:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:21,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:23,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:39:23,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-11-25 23:39:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:26,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454069387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:26,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:39:26,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-25 23:39:26,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031283226] [2022-11-25 23:39:26,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:26,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:39:26,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:39:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:39:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=189, Unknown=1, NotChecked=0, Total=240 [2022-11-25 23:39:26,398 INFO L87 Difference]: Start difference. First operand 2387 states and 8256 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:40:04,995 WARN L233 SmtUtils]: Spent 38.06s on a formula simplification. DAG size of input: 51 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:40:45,162 WARN L233 SmtUtils]: Spent 37.54s 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) [2022-11-25 23:41:18,071 WARN L233 SmtUtils]: Spent 28.87s on a formula simplification. DAG size of input: 68 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:41:34,429 WARN L233 SmtUtils]: Spent 11.77s on a formula simplification. DAG size of input: 50 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:13,499 WARN L233 SmtUtils]: Spent 33.36s on a formula simplification. DAG size of input: 70 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:20,908 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 67 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:51,779 WARN L233 SmtUtils]: Spent 28.02s on a formula simplification. DAG size of input: 74 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:05,189 WARN L233 SmtUtils]: Spent 11.99s on a formula simplification. DAG size of input: 67 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:12,807 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 69 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:28,996 WARN L233 SmtUtils]: Spent 10.84s on a formula simplification. DAG size of input: 73 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:56,372 WARN L233 SmtUtils]: Spent 20.43s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:44:27,624 WARN L233 SmtUtils]: Spent 27.58s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:44:38,605 WARN L233 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 73 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:44:53,121 WARN L233 SmtUtils]: Spent 10.98s on a formula simplification. DAG size of input: 59 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:44:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:56,084 INFO L93 Difference]: Finished difference Result 33386 states and 115197 transitions. [2022-11-25 23:44:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 23:44:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:44:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:56,193 INFO L225 Difference]: With dead ends: 33386 [2022-11-25 23:44:56,193 INFO L226 Difference]: Without dead ends: 33386 [2022-11-25 23:44:56,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 320.5s TimeCoverageRelationStatistics Valid=497, Invalid=1479, Unknown=4, NotChecked=0, Total=1980 [2022-11-25 23:44:56,194 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2082 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2082 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:56,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2082 Valid, 0 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2022-11-25 23:44:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33386 states. [2022-11-25 23:44:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33386 to 2582. [2022-11-25 23:44:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2582 states, 2467 states have (on average 3.7458451560599917) internal successors, (9241), 2581 states have internal predecessors, (9241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:44:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 9241 transitions. [2022-11-25 23:44:56,435 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 9241 transitions. Word has length 9 [2022-11-25 23:44:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:56,435 INFO L495 AbstractCegarLoop]: Abstraction has 2582 states and 9241 transitions. [2022-11-25 23:44:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:44:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 9241 transitions. [2022-11-25 23:44:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:44:56,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:56,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:56,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:56,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:56,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:57,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:57,043 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:44:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash -942357035, now seen corresponding path program 1 times [2022-11-25 23:44:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:57,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976362743] [2022-11-25 23:44:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:57,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:44:57,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:57,045 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:44:57,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 23:44:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:57,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:44:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:57,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:44:57,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:44:57,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:57,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:44:57,445 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:44:57,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:44:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:44:57,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:45:00,345 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:00,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976362743] [2022-11-25 23:45:00,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976362743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:00,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872676419] [2022-11-25 23:45:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:00,346 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:00,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:45:00,355 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:45:00,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-25 23:45:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:45:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:00,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:45:00,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:45:00,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:00,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:45:00,928 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:45:00,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:45:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:45:01,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:45:01,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1872676419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:01,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224829966] [2022-11-25 23:45:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:01,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:01,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:01,323 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:45:01,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 23:45:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:45:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:01,521 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:45:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:01,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:45:01,671 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:45:01,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:45:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:45:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:02,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:45:02,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-25 23:45:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:45:04,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224829966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:04,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:45:04,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 13 [2022-11-25 23:45:04,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640284439] [2022-11-25 23:45:04,565 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:45:04,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:45:04,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:45:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-11-25 23:45:04,566 INFO L87 Difference]: Start difference. First operand 2582 states and 9241 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:29,582 WARN L233 SmtUtils]: Spent 24.59s on a formula simplification. DAG size of input: 41 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:45:55,169 WARN L233 SmtUtils]: Spent 24.71s on a formula simplification. DAG size of input: 54 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:46:24,229 WARN L233 SmtUtils]: Spent 28.72s on a formula simplification. DAG size of input: 47 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:46:42,396 WARN L233 SmtUtils]: Spent 16.66s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:47:07,635 WARN L233 SmtUtils]: Spent 24.83s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:47:20,925 WARN L233 SmtUtils]: Spent 13.15s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:47:48,243 WARN L233 SmtUtils]: Spent 26.92s on a formula simplification. DAG size of input: 53 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:48:00,954 WARN L233 SmtUtils]: Spent 12.60s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:48:16,409 WARN L233 SmtUtils]: Spent 14.51s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:48:32,072 WARN L233 SmtUtils]: Spent 14.80s on a formula simplification. DAG size of input: 52 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:49:01,534 WARN L233 SmtUtils]: Spent 24.84s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:49:27,330 WARN L233 SmtUtils]: Spent 24.85s on a formula simplification. DAG size of input: 50 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:49:40,759 WARN L233 SmtUtils]: Spent 12.80s on a formula simplification. DAG size of input: 59 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:49:53,889 WARN L233 SmtUtils]: Spent 12.67s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:49:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:56,023 INFO L93 Difference]: Finished difference Result 37712 states and 133683 transitions. [2022-11-25 23:49:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 23:49:56,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:49:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:56,179 INFO L225 Difference]: With dead ends: 37712 [2022-11-25 23:49:56,180 INFO L226 Difference]: Without dead ends: 37712 [2022-11-25 23:49:56,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 285.6s TimeCoverageRelationStatistics Valid=431, Invalid=1290, Unknown=1, NotChecked=0, Total=1722 [2022-11-25 23:49:56,181 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1836 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:56,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1836 Valid, 0 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-25 23:49:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37712 states. [2022-11-25 23:49:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37712 to 3112. [2022-11-25 23:49:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 3025 states have (on average 3.8257851239669423) internal successors, (11573), 3111 states have internal predecessors, (11573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:49:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 11573 transitions. [2022-11-25 23:49:56,602 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 11573 transitions. Word has length 9 [2022-11-25 23:49:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:56,602 INFO L495 AbstractCegarLoop]: Abstraction has 3112 states and 11573 transitions. [2022-11-25 23:49:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:49:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 11573 transitions. [2022-11-25 23:49:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:49:56,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:56,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:49:56,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-25 23:49:56,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-25 23:49:57,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 23:49:57,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:57,218 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:49:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1318220326, now seen corresponding path program 1 times [2022-11-25 23:49:57,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:49:57,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359759426] [2022-11-25 23:49:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:57,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:49:57,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:49:57,220 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:49:57,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:49:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:49:57,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:49:57,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:49:57,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:49:57,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359759426] [2022-11-25 23:49:57,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359759426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:49:57,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:49:57,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:49:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040353389] [2022-11-25 23:49:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:49:57,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:49:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:49:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:49:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:49:57,513 INFO L87 Difference]: Start difference. First operand 3112 states and 11573 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-11-25 23:49:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:58,751 INFO L93 Difference]: Finished difference Result 3986 states and 14451 transitions. [2022-11-25 23:49:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:49:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 10 [2022-11-25 23:49:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:58,763 INFO L225 Difference]: With dead ends: 3986 [2022-11-25 23:49:58,763 INFO L226 Difference]: Without dead ends: 3986 [2022-11-25 23:49:58,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:49:58,763 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:58,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:49:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-11-25 23:49:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3506. [2022-11-25 23:49:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3419 states have (on average 3.8277274056741737) internal successors, (13087), 3505 states have internal predecessors, (13087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:49:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 13087 transitions. [2022-11-25 23:49:58,831 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 13087 transitions. Word has length 10 [2022-11-25 23:49:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:58,831 INFO L495 AbstractCegarLoop]: Abstraction has 3506 states and 13087 transitions. [2022-11-25 23:49:58,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-11-25 23:49:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 13087 transitions. [2022-11-25 23:49:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:49:58,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:58,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:49:58,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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 [2022-11-25 23:49:59,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:49:59,036 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-25 23:49:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1205663178, now seen corresponding path program 1 times [2022-11-25 23:49:59,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:49:59,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154958070] [2022-11-25 23:49:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:59,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:49:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:49:59,037 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:49:59,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/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)] Waiting until timeout for monitored process [2022-11-25 23:49:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:49:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:59,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:49:59,422 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 23:49:59,422 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 [2022-11-25 23:49:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:59,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:01,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:50:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154958070] [2022-11-25 23:50:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154958070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1431713966] [2022-11-25 23:50:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:01,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:50:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:50:01,396 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:50:01,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-25 23:50:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:01,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:50:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:01,758 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 6 treesize of output 7 [2022-11-25 23:50:01,768 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:50:01,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:01,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:50:02,001 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:50:02,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 23:50:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:50:02,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:50:07,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1431713966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:07,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739786769] [2022-11-25 23:50:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:07,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:07,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:07,071 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:07,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0f31e-4341-44c1-babd-26213b46323a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 23:50:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:07,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:50:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:07,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:50:07,328 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 23:50:07,329 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 [2022-11-25 23:50:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:07,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:08,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739786769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:08,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:50:08,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 7, 7] total 17 [2022-11-25 23:50:08,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219697969] [2022-11-25 23:50:08,070 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:08,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:50:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:50:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:50:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=249, Unknown=1, NotChecked=0, Total=306 [2022-11-25 23:50:08,073 INFO L87 Difference]: Start difference. First operand 3506 states and 13087 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) 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) [2022-11-25 23:50:16,377 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:50:39,388 WARN L233 SmtUtils]: Spent 14.23s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:50:52,353 WARN L233 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:51:10,584 WARN L233 SmtUtils]: Spent 17.73s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)