./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:33:13,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:33:13,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:33:13,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:33:13,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:33:13,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:33:13,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:33:13,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:33:13,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:33:13,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:33:13,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:33:13,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:33:13,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:33:13,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:33:13,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:33:13,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:33:13,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:33:13,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:33:13,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:33:13,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:33:13,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:33:13,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:33:13,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:33:13,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:33:13,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:33:13,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:33:13,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:33:13,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:33:13,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:33:13,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:33:13,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:33:13,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:33:13,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:33:13,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:33:13,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:33:13,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:33:13,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:33:13,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:33:13,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:33:13,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:33:13,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:33:13,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:33:13,550 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:33:13,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:33:13,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:33:13,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:33:13,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:33:13,552 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:33:13,553 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:33:13,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:33:13,553 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:33:13,553 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:33:13,554 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:33:13,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:33:13,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:33:13,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:33:13,555 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:33:13,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:33:13,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:33:13,556 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:33:13,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:33:13,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:33:13,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:33:13,558 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:33:13,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:33:13,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:33:13,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:33:13,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:33:13,559 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:33:13,559 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:33:13,559 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:33:13,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:33:13,560 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:33:13,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:33:13,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:33:13,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:33:13,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:33:13,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:33:13,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:33:13,562 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:33:13,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:33:13,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:33:13,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:33:13,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:33:13,563 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_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-19 08:33:13,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:33:13,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:33:13,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:33:13,899 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:33:13,900 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:33:13,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-19 08:33:13,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/dc545b89f/c3fecf3af34e4405aa109d341be83ac9/FLAGdc16c02ce [2022-11-19 08:33:14,554 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:33:14,555 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-19 08:33:14,572 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/dc545b89f/c3fecf3af34e4405aa109d341be83ac9/FLAGdc16c02ce [2022-11-19 08:33:14,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/dc545b89f/c3fecf3af34e4405aa109d341be83ac9 [2022-11-19 08:33:14,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:33:14,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:33:14,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:33:14,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:33:14,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:33:14,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:33:14" (1/1) ... [2022-11-19 08:33:14,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bad0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:14, skipping insertion in model container [2022-11-19 08:33:14,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:33:14" (1/1) ... [2022-11-19 08:33:14,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:33:14,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:33:15,154 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-19 08:33:15,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:33:15,172 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 08:33:15,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1fab68cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:15, skipping insertion in model container [2022-11-19 08:33:15,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:33:15,174 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 08:33:15,176 INFO L158 Benchmark]: Toolchain (without parser) took 272.97ms. Allocated memory is still 104.9MB. Free memory was 76.3MB in the beginning and 82.2MB in the end (delta: -6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:33:15,176 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 62.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:33:15,177 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.26ms. Allocated memory is still 104.9MB. Free memory was 76.0MB in the beginning and 82.2MB in the end (delta: -6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:33:15,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 62.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.26ms. Allocated memory is still 104.9MB. Free memory was 76.0MB in the beginning and 82.2MB in the end (delta: -6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 126]: 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_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:33:17,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:33:17,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:33:17,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:33:17,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:33:17,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:33:17,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:33:17,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:33:17,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:33:17,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:33:17,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:33:17,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:33:17,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:33:17,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:33:17,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:33:17,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:33:17,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:33:17,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:33:17,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:33:17,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:33:17,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:33:17,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:33:17,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:33:17,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:33:17,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:33:17,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:33:17,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:33:17,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:33:17,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:33:17,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:33:17,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:33:17,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:33:17,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:33:17,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:33:17,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:33:17,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:33:17,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:33:17,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:33:17,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:33:17,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:33:17,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:33:17,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 08:33:17,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:33:17,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:33:17,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:33:17,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:33:17,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:33:17,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:33:17,401 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:33:17,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:33:17,401 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:33:17,402 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:33:17,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:33:17,403 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:33:17,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:33:17,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:33:17,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:33:17,405 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:33:17,406 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:33:17,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:33:17,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:33:17,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:33:17,407 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:33:17,407 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:33:17,407 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:33:17,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:33:17,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:33:17,408 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 08:33:17,408 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 08:33:17,409 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:33:17,409 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:33:17,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:33:17,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 08:33:17,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:33:17,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:33:17,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:33:17,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:33:17,412 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 08:33:17,412 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 08:33:17,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:33:17,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 08:33:17,413 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_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-19 08:33:17,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:33:17,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:33:17,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:33:17,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:33:17,812 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:33:17,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-19 08:33:17,886 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/f564f03f0/95a8b3153e6f48e5beaef4161641319e/FLAG7865756e1 [2022-11-19 08:33:18,428 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:33:18,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-19 08:33:18,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/f564f03f0/95a8b3153e6f48e5beaef4161641319e/FLAG7865756e1 [2022-11-19 08:33:18,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/data/f564f03f0/95a8b3153e6f48e5beaef4161641319e [2022-11-19 08:33:18,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:33:18,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:33:18,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:33:18,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:33:18,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:33:18,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:33:18" (1/1) ... [2022-11-19 08:33:18,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3bcff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:18, skipping insertion in model container [2022-11-19 08:33:18,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:33:18" (1/1) ... [2022-11-19 08:33:18,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:33:18,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:33:18,998 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-19 08:33:19,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:33:19,049 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 08:33:19,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:33:19,085 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-19 08:33:19,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:33:19,094 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:33:19,121 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-19 08:33:19,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:33:19,140 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:33:19,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19 WrapperNode [2022-11-19 08:33:19,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:33:19,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:33:19,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:33:19,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:33:19,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,182 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 158 [2022-11-19 08:33:19,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:33:19,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:33:19,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:33:19,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:33:19,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:33:19,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:33:19,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:33:19,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:33:19,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (1/1) ... [2022-11-19 08:33:19,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:33:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:19,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:33:19,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:33:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:33:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 08:33:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:33:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 08:33:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 08:33:19,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 08:33:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 08:33:19,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 08:33:19,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 08:33:19,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 08:33:19,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 08:33:19,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 08:33:19,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:33:19,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:33:19,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:33:19,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:33:19,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 08:33:19,321 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 08:33:19,434 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:33:19,438 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:33:20,053 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:33:20,185 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:33:20,185 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 08:33:20,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:33:20 BoogieIcfgContainer [2022-11-19 08:33:20,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:33:20,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:33:20,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:33:20,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:33:20,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:33:18" (1/3) ... [2022-11-19 08:33:20,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5721e601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:33:20, skipping insertion in model container [2022-11-19 08:33:20,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:19" (2/3) ... [2022-11-19 08:33:20,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5721e601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:33:20, skipping insertion in model container [2022-11-19 08:33:20,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:33:20" (3/3) ... [2022-11-19 08:33:20,197 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-11-19 08:33:20,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:33:20,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-19 08:33:20,239 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:33:20,321 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 08:33:20,354 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:33:20,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 163 transitions, 350 flow [2022-11-19 08:33:20,371 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 163 transitions, 350 flow [2022-11-19 08:33:20,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 163 transitions, 350 flow [2022-11-19 08:33:20,440 INFO L130 PetriNetUnfolder]: 10/160 cut-off events. [2022-11-19 08:33:20,440 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 08:33:20,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 160 events. 10/160 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 174 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-19 08:33:20,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 2120 [2022-11-19 08:33:50,672 INFO L134 LiptonReduction]: Checked pairs total: 3739 [2022-11-19 08:33:50,673 INFO L136 LiptonReduction]: Total number of compositions: 161 [2022-11-19 08:33:50,681 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 49 transitions, 122 flow [2022-11-19 08:33:50,761 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 682 states, 584 states have (on average 3.518835616438356) internal successors, (2055), 681 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:50,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:33:50,783 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;@68f64e5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:33:50,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-19 08:33:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 682 states, 584 states have (on average 3.518835616438356) internal successors, (2055), 681 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:33:50,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:50,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:33:50,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:33:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 22098, now seen corresponding path program 1 times [2022-11-19 08:33:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:50,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825120204] [2022-11-19 08:33:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:50,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:50,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:50,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:50,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 08:33:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:33:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:51,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:51,183 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 08:33:51,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-19 08:33:51,222 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 08:33:51,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 08:33:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:51,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:51,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825120204] [2022-11-19 08:33:51,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825120204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:51,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:51,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:33:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418948276] [2022-11-19 08:33:51,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:51,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:51,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:51,319 INFO L87 Difference]: Start difference. First operand has 682 states, 584 states have (on average 3.518835616438356) internal successors, (2055), 681 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:51,514 INFO L93 Difference]: Finished difference Result 682 states and 2059 transitions. [2022-11-19 08:33:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:33:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:51,534 INFO L225 Difference]: With dead ends: 682 [2022-11-19 08:33:51,534 INFO L226 Difference]: Without dead ends: 682 [2022-11-19 08:33:51,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:51,539 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:51,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 08:33:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-19 08:33:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-11-19 08:33:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 585 states have (on average 3.5196581196581196) internal successors, (2059), 681 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2059 transitions. [2022-11-19 08:33:51,616 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2059 transitions. Word has length 2 [2022-11-19 08:33:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 2059 transitions. [2022-11-19 08:33:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2059 transitions. [2022-11-19 08:33:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:33:51,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:51,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:33:51,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:51,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:33:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 22019, now seen corresponding path program 1 times [2022-11-19 08:33:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485091523] [2022-11-19 08:33:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:51,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:51,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:51,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 08:33:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:33:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:52,031 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:33:52,031 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 [2022-11-19 08:33:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:52,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:52,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:52,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485091523] [2022-11-19 08:33:52,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485091523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:52,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:52,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:33:52,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794938431] [2022-11-19 08:33:52,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:52,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:52,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:52,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:52,052 INFO L87 Difference]: Start difference. First operand 682 states and 2059 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:52,232 INFO L93 Difference]: Finished difference Result 681 states and 2057 transitions. [2022-11-19 08:33:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:33:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:52,238 INFO L225 Difference]: With dead ends: 681 [2022-11-19 08:33:52,238 INFO L226 Difference]: Without dead ends: 681 [2022-11-19 08:33:52,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:52,240 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:52,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:33:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-19 08:33:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 681. [2022-11-19 08:33:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 585 states have (on average 3.516239316239316) internal successors, (2057), 680 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2057 transitions. [2022-11-19 08:33:52,269 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2057 transitions. Word has length 2 [2022-11-19 08:33:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:52,270 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 2057 transitions. [2022-11-19 08:33:52,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2057 transitions. [2022-11-19 08:33:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:33:52,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:52,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:33:52,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:52,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:52,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:33:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash 22020, now seen corresponding path program 1 times [2022-11-19 08:33:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:52,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264969528] [2022-11-19 08:33:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:52,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:52,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:52,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:52,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 08:33:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:52,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:33:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:52,724 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:33:52,725 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 [2022-11-19 08:33:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:52,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:52,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264969528] [2022-11-19 08:33:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264969528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:52,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:52,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:33:52,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111076165] [2022-11-19 08:33:52,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:52,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:52,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:52,771 INFO L87 Difference]: Start difference. First operand 681 states and 2057 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:53,171 INFO L93 Difference]: Finished difference Result 1357 states and 4103 transitions. [2022-11-19 08:33:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:33:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:53,181 INFO L225 Difference]: With dead ends: 1357 [2022-11-19 08:33:53,181 INFO L226 Difference]: Without dead ends: 1357 [2022-11-19 08:33:53,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:53,192 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:53,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:33:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-11-19 08:33:53,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 681. [2022-11-19 08:33:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 585 states have (on average 3.5145299145299145) internal successors, (2056), 680 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2056 transitions. [2022-11-19 08:33:53,267 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2056 transitions. Word has length 2 [2022-11-19 08:33:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:53,267 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 2056 transitions. [2022-11-19 08:33:53,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2056 transitions. [2022-11-19 08:33:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:33:53,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:53,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:33:53,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:53,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:53,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:33:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash 22100, now seen corresponding path program 1 times [2022-11-19 08:33:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:53,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215971029] [2022-11-19 08:33:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:53,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:53,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:53,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:53,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 08:33:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:53,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:33:53,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:53,634 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-19 08:33:53,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-19 08:33:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:53,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:53,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215971029] [2022-11-19 08:33:53,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215971029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:53,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:53,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:33:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692053193] [2022-11-19 08:33:53,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:53,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:53,689 INFO L87 Difference]: Start difference. First operand 681 states and 2056 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:53,851 INFO L93 Difference]: Finished difference Result 681 states and 2055 transitions. [2022-11-19 08:33:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:53,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:33:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:53,856 INFO L225 Difference]: With dead ends: 681 [2022-11-19 08:33:53,857 INFO L226 Difference]: Without dead ends: 681 [2022-11-19 08:33:53,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:53,858 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:53,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-19 08:33:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-19 08:33:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 681. [2022-11-19 08:33:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 585 states have (on average 3.5128205128205128) internal successors, (2055), 680 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2055 transitions. [2022-11-19 08:33:53,883 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2055 transitions. Word has length 2 [2022-11-19 08:33:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:53,883 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 2055 transitions. [2022-11-19 08:33:53,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2055 transitions. [2022-11-19 08:33:53,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:33:53,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:53,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:33:53,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:54,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:54,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:33:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash 685188, now seen corresponding path program 1 times [2022-11-19 08:33:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:54,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847716428] [2022-11-19 08:33:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:54,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:54,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:54,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 08:33:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:33:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:54,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:54,361 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-19 08:33:54,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-19 08:33:54,385 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 08:33:54,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 08:33:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:54,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:54,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:54,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847716428] [2022-11-19 08:33:54,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847716428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:54,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1554519719] [2022-11-19 08:33:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:54,940 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:33:54,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:33:54,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:33:54,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 08:33:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:33:55,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:55,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:55,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:55,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:55,232 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 08:33:55,232 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 28 [2022-11-19 08:33:55,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:33:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:33:55,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:55,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1554519719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:55,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:33:55,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-19 08:33:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912407393] [2022-11-19 08:33:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:33:55,341 INFO L87 Difference]: Start difference. First operand 681 states and 2055 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:55,488 INFO L93 Difference]: Finished difference Result 680 states and 2054 transitions. [2022-11-19 08:33:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:33:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:55,494 INFO L225 Difference]: With dead ends: 680 [2022-11-19 08:33:55,494 INFO L226 Difference]: Without dead ends: 680 [2022-11-19 08:33:55,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:33:55,495 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:55,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-19 08:33:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-19 08:33:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 680. [2022-11-19 08:33:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 585 states have (on average 3.511111111111111) internal successors, (2054), 679 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2054 transitions. [2022-11-19 08:33:55,535 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2054 transitions. Word has length 3 [2022-11-19 08:33:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:55,535 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 2054 transitions. [2022-11-19 08:33:55,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2054 transitions. [2022-11-19 08:33:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:33:55,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:55,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:33:55,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:55,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-19 08:33:55,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:55,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:33:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash 685110, now seen corresponding path program 1 times [2022-11-19 08:33:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:55,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119911681] [2022-11-19 08:33:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:55,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:55,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 08:33:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:33:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:56,154 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:33:56,154 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 [2022-11-19 08:33:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:56,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:56,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:56,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119911681] [2022-11-19 08:33:56,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119911681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:56,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [138453680] [2022-11-19 08:33:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:56,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:33:56,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:33:56,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:33:56,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 08:33:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:33:56,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:56,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:33:56,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:33:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:56,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:56,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [138453680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:56,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612321437] [2022-11-19 08:33:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:56,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:56,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:56,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:33:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:33:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:57,109 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:33:57,109 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 [2022-11-19 08:33:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:57,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:57,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612321437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:57,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:33:57,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 08:33:57,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646852818] [2022-11-19 08:33:57,323 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:33:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:33:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:33:57,325 INFO L87 Difference]: Start difference. First operand 680 states and 2054 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:58,891 INFO L93 Difference]: Finished difference Result 2710 states and 8204 transitions. [2022-11-19 08:33:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:33:58,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:33:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:58,909 INFO L225 Difference]: With dead ends: 2710 [2022-11-19 08:33:58,909 INFO L226 Difference]: Without dead ends: 2710 [2022-11-19 08:33:58,910 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 [2022-11-19 08:33:58,910 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 385 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:58,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 15 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 08:33:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2022-11-19 08:33:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 683. [2022-11-19 08:33:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 588 states have (on average 3.508503401360544) internal successors, (2063), 682 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2063 transitions. [2022-11-19 08:33:58,951 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2063 transitions. Word has length 3 [2022-11-19 08:33:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:58,951 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 2063 transitions. [2022-11-19 08:33:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2063 transitions. [2022-11-19 08:33:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:33:58,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:58,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:33:58,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:59,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:59,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:59,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:59,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:33:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash 685190, now seen corresponding path program 1 times [2022-11-19 08:33:59,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:59,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105929097] [2022-11-19 08:33:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:59,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:59,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:59,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 08:33:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:33:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:59,743 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-19 08:33:59,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-19 08:33:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:33:59,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:59,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:59,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105929097] [2022-11-19 08:33:59,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105929097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:59,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:59,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:33:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116824136] [2022-11-19 08:33:59,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:59,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:59,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:59,800 INFO L87 Difference]: Start difference. First operand 683 states and 2063 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:59,940 INFO L93 Difference]: Finished difference Result 682 states and 2059 transitions. [2022-11-19 08:33:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:33:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:59,945 INFO L225 Difference]: With dead ends: 682 [2022-11-19 08:33:59,945 INFO L226 Difference]: Without dead ends: 682 [2022-11-19 08:33:59,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:59,946 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:59,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:33:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-19 08:33:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-11-19 08:33:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 588 states have (on average 3.501700680272109) internal successors, (2059), 681 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2059 transitions. [2022-11-19 08:33:59,969 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2059 transitions. Word has length 3 [2022-11-19 08:33:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:59,970 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 2059 transitions. [2022-11-19 08:33:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2059 transitions. [2022-11-19 08:33:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:33:59,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:59,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:33:59,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:00,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:00,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash 21253102, now seen corresponding path program 1 times [2022-11-19 08:34:00,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:00,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199905875] [2022-11-19 08:34:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:00,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:00,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:00,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:00,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 08:34:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:00,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:34:00,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:00,328 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:34:00,329 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:34:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:00,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:00,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199905875] [2022-11-19 08:34:00,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199905875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:00,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:00,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:00,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805077304] [2022-11-19 08:34:00,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:00,426 INFO L87 Difference]: Start difference. First operand 682 states and 2059 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:00,542 INFO L93 Difference]: Finished difference Result 685 states and 2069 transitions. [2022-11-19 08:34:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:34:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:00,547 INFO L225 Difference]: With dead ends: 685 [2022-11-19 08:34:00,547 INFO L226 Difference]: Without dead ends: 685 [2022-11-19 08:34:00,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:00,548 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:00,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:34:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-19 08:34:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-11-19 08:34:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 591 states have (on average 3.500846023688663) internal successors, (2069), 684 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2069 transitions. [2022-11-19 08:34:00,587 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2069 transitions. Word has length 4 [2022-11-19 08:34:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:00,588 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 2069 transitions. [2022-11-19 08:34:00,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2069 transitions. [2022-11-19 08:34:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:34:00,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:00,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:34:00,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:00,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 21253103, now seen corresponding path program 1 times [2022-11-19 08:34:00,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:00,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003172439] [2022-11-19 08:34:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:00,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:00,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:00,803 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:00,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 08:34:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:00,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:34:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:01,002 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:01,003 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 [2022-11-19 08:34:01,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:34:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:01,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:01,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:01,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003172439] [2022-11-19 08:34:01,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003172439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:01,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:01,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:01,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134275674] [2022-11-19 08:34:01,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:01,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:01,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:01,095 INFO L87 Difference]: Start difference. First operand 685 states and 2069 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:01,220 INFO L93 Difference]: Finished difference Result 685 states and 2067 transitions. [2022-11-19 08:34:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:34:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:01,225 INFO L225 Difference]: With dead ends: 685 [2022-11-19 08:34:01,225 INFO L226 Difference]: Without dead ends: 685 [2022-11-19 08:34:01,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:01,226 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:01,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:34:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-19 08:34:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-11-19 08:34:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 591 states have (on average 3.49746192893401) internal successors, (2067), 684 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2067 transitions. [2022-11-19 08:34:01,246 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2067 transitions. Word has length 4 [2022-11-19 08:34:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:01,247 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 2067 transitions. [2022-11-19 08:34:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2067 transitions. [2022-11-19 08:34:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:34:01,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:01,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:34:01,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:01,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:01,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash 658482592, now seen corresponding path program 1 times [2022-11-19 08:34:01,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:01,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070856528] [2022-11-19 08:34:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:01,460 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 [2022-11-19 08:34:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:01,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:01,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 08:34:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:01,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:34:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:01,641 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:34:01,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:34:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:34:01,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:01,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:01,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070856528] [2022-11-19 08:34:01,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070856528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:01,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:01,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:01,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795431755] [2022-11-19 08:34:01,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:01,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:01,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:01,775 INFO L87 Difference]: Start difference. First operand 685 states and 2067 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:01,885 INFO L93 Difference]: Finished difference Result 685 states and 2071 transitions. [2022-11-19 08:34:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:01,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:34:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:01,890 INFO L225 Difference]: With dead ends: 685 [2022-11-19 08:34:01,890 INFO L226 Difference]: Without dead ends: 685 [2022-11-19 08:34:01,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:01,891 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:01,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:34:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-19 08:34:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-11-19 08:34:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 591 states have (on average 3.504230118443316) internal successors, (2071), 684 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2071 transitions. [2022-11-19 08:34:01,913 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2071 transitions. Word has length 5 [2022-11-19 08:34:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:01,913 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 2071 transitions. [2022-11-19 08:34:01,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2071 transitions. [2022-11-19 08:34:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:34:01,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:01,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:34:01,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:02,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:02,140 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:02,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash 658482593, now seen corresponding path program 1 times [2022-11-19 08:34:02,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:02,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343083678] [2022-11-19 08:34:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:02,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:02,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 08:34:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:34:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:02,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:02,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:02,367 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-19 08:34:02,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-19 08:34:02,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:34:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:02,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:02,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343083678] [2022-11-19 08:34:02,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343083678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314230690] [2022-11-19 08:34:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:02,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:34:02,859 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:34:02,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-19 08:34:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:34:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:03,141 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-19 08:34:03,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-19 08:34:03,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-19 08:34:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:34:03,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:03,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314230690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:03,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:34:03,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:34:03,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634785621] [2022-11-19 08:34:03,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:03,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:03,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:34:03,266 INFO L87 Difference]: Start difference. First operand 685 states and 2071 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:03,383 INFO L93 Difference]: Finished difference Result 684 states and 2068 transitions. [2022-11-19 08:34:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:34:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:03,388 INFO L225 Difference]: With dead ends: 684 [2022-11-19 08:34:03,388 INFO L226 Difference]: Without dead ends: 684 [2022-11-19 08:34:03,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:34:03,389 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:03,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:34:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-19 08:34:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2022-11-19 08:34:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 587 states have (on average 3.5093696763202726) internal successors, (2060), 680 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2060 transitions. [2022-11-19 08:34:03,410 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2060 transitions. Word has length 5 [2022-11-19 08:34:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:03,410 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 2060 transitions. [2022-11-19 08:34:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2060 transitions. [2022-11-19 08:34:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:34:03,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:03,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:34:03,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:03,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:03,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:03,823 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash 658841609, now seen corresponding path program 1 times [2022-11-19 08:34:03,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:03,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356957624] [2022-11-19 08:34:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:03,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:03,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:03,826 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:03,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 08:34:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:34:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:03,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:03,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:03,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356957624] [2022-11-19 08:34:03,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356957624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:03,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:03,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:03,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114051673] [2022-11-19 08:34:03,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:03,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:03,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:03,919 INFO L87 Difference]: Start difference. First operand 681 states and 2060 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:04,178 INFO L93 Difference]: Finished difference Result 904 states and 2643 transitions. [2022-11-19 08:34:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:34:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:04,185 INFO L225 Difference]: With dead ends: 904 [2022-11-19 08:34:04,185 INFO L226 Difference]: Without dead ends: 904 [2022-11-19 08:34:04,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:04,186 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:04,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 6 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:34:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-11-19 08:34:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 774. [2022-11-19 08:34:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 684 states have (on average 3.440058479532164) internal successors, (2353), 773 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2353 transitions. [2022-11-19 08:34:04,231 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2353 transitions. Word has length 5 [2022-11-19 08:34:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:04,231 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 2353 transitions. [2022-11-19 08:34:04,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2353 transitions. [2022-11-19 08:34:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:34:04,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:04,232 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 08:34:04,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:04,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:04,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1062251900, now seen corresponding path program 2 times [2022-11-19 08:34:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:04,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463054634] [2022-11-19 08:34:04,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:04,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:04,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:04,446 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:04,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 08:34:04,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:34:04,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:34:04,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:04,685 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:04,685 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 [2022-11-19 08:34:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:04,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:05,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:05,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463054634] [2022-11-19 08:34:05,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463054634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714258028] [2022-11-19 08:34:05,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:05,670 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:05,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:34:05,679 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:34:05,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-19 08:34:05,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:34:05,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:34:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:06,061 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:06,062 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 [2022-11-19 08:34:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:06,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:06,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714258028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151474571] [2022-11-19 08:34:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:06,319 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:06,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:34:06,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:34:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:34:06,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:06,583 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:06,583 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 [2022-11-19 08:34:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:06,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:06,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151474571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:06,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:34:06,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-19 08:34:06,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260778336] [2022-11-19 08:34:06,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:06,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:34:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:34:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:34:06,860 INFO L87 Difference]: Start difference. First operand 774 states and 2353 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) [2022-11-19 08:34:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:12,285 INFO L93 Difference]: Finished difference Result 7683 states and 23434 transitions. [2022-11-19 08:34:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:34:12,286 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 [2022-11-19 08:34:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:12,332 INFO L225 Difference]: With dead ends: 7683 [2022-11-19 08:34:12,333 INFO L226 Difference]: Without dead ends: 7683 [2022-11-19 08:34:12,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:34:12,333 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1292 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:12,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 87 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-19 08:34:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7683 states. [2022-11-19 08:34:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 780. [2022-11-19 08:34:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 690 states have (on average 3.427536231884058) internal successors, (2365), 779 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2365 transitions. [2022-11-19 08:34:12,413 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2365 transitions. Word has length 6 [2022-11-19 08:34:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:12,413 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 2365 transitions. [2022-11-19 08:34:12,413 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) [2022-11-19 08:34:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2365 transitions. [2022-11-19 08:34:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:34:12,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:12,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:34:12,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:12,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-19 08:34:12,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:13,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1050743410, now seen corresponding path program 1 times [2022-11-19 08:34:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:13,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319502232] [2022-11-19 08:34:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:13,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:13,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 08:34:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:13,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:34:13,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:13,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:13,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:13,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319502232] [2022-11-19 08:34:13,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319502232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:13,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:13,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794238713] [2022-11-19 08:34:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:13,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:13,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:13,134 INFO L87 Difference]: Start difference. First operand 780 states and 2365 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:13,498 INFO L93 Difference]: Finished difference Result 816 states and 2348 transitions. [2022-11-19 08:34:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:34:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:13,502 INFO L225 Difference]: With dead ends: 816 [2022-11-19 08:34:13,502 INFO L226 Difference]: Without dead ends: 814 [2022-11-19 08:34:13,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:13,503 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:13,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-19 08:34:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 730. [2022-11-19 08:34:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 628 states have (on average 3.450636942675159) internal successors, (2167), 729 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2167 transitions. [2022-11-19 08:34:13,539 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2167 transitions. Word has length 6 [2022-11-19 08:34:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:13,540 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 2167 transitions. [2022-11-19 08:34:13,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2167 transitions. [2022-11-19 08:34:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:34:13,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:13,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:34:13,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:13,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:13,755 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:13,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1050590502, now seen corresponding path program 1 times [2022-11-19 08:34:13,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646529088] [2022-11-19 08:34:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:13,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:13,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:13,756 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:13,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 08:34:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:34:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:13,914 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:34:13,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-19 08:34:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:13,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:13,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:13,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646529088] [2022-11-19 08:34:13,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646529088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:13,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:13,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:13,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484951140] [2022-11-19 08:34:13,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:13,946 INFO L87 Difference]: Start difference. First operand 730 states and 2167 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:14,088 INFO L93 Difference]: Finished difference Result 680 states and 2026 transitions. [2022-11-19 08:34:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:14,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:34:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:14,091 INFO L225 Difference]: With dead ends: 680 [2022-11-19 08:34:14,092 INFO L226 Difference]: Without dead ends: 680 [2022-11-19 08:34:14,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:14,092 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:14,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-19 08:34:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 680. [2022-11-19 08:34:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 594 states have (on average 3.410774410774411) internal successors, (2026), 679 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2026 transitions. [2022-11-19 08:34:14,111 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2026 transitions. Word has length 6 [2022-11-19 08:34:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:14,111 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 2026 transitions. [2022-11-19 08:34:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2026 transitions. [2022-11-19 08:34:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:34:14,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:14,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:34:14,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:14,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:14,324 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1050590501, now seen corresponding path program 1 times [2022-11-19 08:34:14,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:14,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410840299] [2022-11-19 08:34:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:14,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:14,326 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:14,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 08:34:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:34:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:14,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,515 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:14,516 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 [2022-11-19 08:34:14,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:14,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:14,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:14,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410840299] [2022-11-19 08:34:14,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410840299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:14,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:14,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:14,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784032191] [2022-11-19 08:34:14,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:14,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:14,560 INFO L87 Difference]: Start difference. First operand 680 states and 2026 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:14,694 INFO L93 Difference]: Finished difference Result 630 states and 1885 transitions. [2022-11-19 08:34:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:34:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:14,699 INFO L225 Difference]: With dead ends: 630 [2022-11-19 08:34:14,699 INFO L226 Difference]: Without dead ends: 630 [2022-11-19 08:34:14,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:14,700 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:14,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-11-19 08:34:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2022-11-19 08:34:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 560 states have (on average 3.3660714285714284) internal successors, (1885), 629 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1885 transitions. [2022-11-19 08:34:14,727 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1885 transitions. Word has length 6 [2022-11-19 08:34:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:14,727 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 1885 transitions. [2022-11-19 08:34:14,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1885 transitions. [2022-11-19 08:34:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:34:14,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:14,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:14,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:14,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:14,941 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1791431509, now seen corresponding path program 1 times [2022-11-19 08:34:14,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:14,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543845925] [2022-11-19 08:34:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:14,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:14,944 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:14,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-19 08:34:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:34:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:15,125 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:34:15,126 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 [2022-11-19 08:34:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:15,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:15,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:15,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543845925] [2022-11-19 08:34:15,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543845925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:15,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:15,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469661038] [2022-11-19 08:34:15,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:15,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:15,164 INFO L87 Difference]: Start difference. First operand 630 states and 1885 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:15,323 INFO L93 Difference]: Finished difference Result 408 states and 1179 transitions. [2022-11-19 08:34:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:34:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:15,325 INFO L225 Difference]: With dead ends: 408 [2022-11-19 08:34:15,325 INFO L226 Difference]: Without dead ends: 408 [2022-11-19 08:34:15,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:15,326 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:15,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-19 08:34:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-11-19 08:34:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 375 states have (on average 3.144) internal successors, (1179), 407 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1179 transitions. [2022-11-19 08:34:15,338 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1179 transitions. Word has length 7 [2022-11-19 08:34:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:15,338 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 1179 transitions. [2022-11-19 08:34:15,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1179 transitions. [2022-11-19 08:34:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:34:15,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:15,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:15,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:15,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:15,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1791431511, now seen corresponding path program 1 times [2022-11-19 08:34:15,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259473066] [2022-11-19 08:34:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:15,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:15,553 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:15,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 08:34:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:34:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:15,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:15,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259473066] [2022-11-19 08:34:15,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259473066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:15,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:15,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:15,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230864919] [2022-11-19 08:34:15,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:15,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:15,744 INFO L87 Difference]: Start difference. First operand 408 states and 1179 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:16,021 INFO L93 Difference]: Finished difference Result 511 states and 1392 transitions. [2022-11-19 08:34:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:16,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:34:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:16,023 INFO L225 Difference]: With dead ends: 511 [2022-11-19 08:34:16,024 INFO L226 Difference]: Without dead ends: 507 [2022-11-19 08:34:16,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:16,024 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:16,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 9 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:34:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-19 08:34:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 473. [2022-11-19 08:34:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 440 states have (on average 3.0318181818181817) internal successors, (1334), 472 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1334 transitions. [2022-11-19 08:34:16,037 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1334 transitions. Word has length 7 [2022-11-19 08:34:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:16,037 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 1334 transitions. [2022-11-19 08:34:16,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1334 transitions. [2022-11-19 08:34:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:34:16,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:16,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:16,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-19 08:34:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:16,250 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1739719781, now seen corresponding path program 1 times [2022-11-19 08:34:16,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:16,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360003108] [2022-11-19 08:34:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:16,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:16,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:16,253 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:16,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-19 08:34:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:34:16,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:16,510 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:16,510 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 [2022-11-19 08:34:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:16,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:17,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360003108] [2022-11-19 08:34:17,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360003108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:17,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963697075] [2022-11-19 08:34:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:17,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:34:17,583 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:34:17,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-19 08:34:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:17,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:34:17,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:17,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:17,884 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 [2022-11-19 08:34:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:18,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963697075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453542784] [2022-11-19 08:34:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:18,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:18,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:18,411 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:18,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 08:34:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:18,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:34:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:18,680 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:18,681 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 [2022-11-19 08:34:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:18,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:19,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453542784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:19,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:34:19,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-19 08:34:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346915635] [2022-11-19 08:34:19,130 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:34:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:34:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:34:19,131 INFO L87 Difference]: Start difference. First operand 473 states and 1334 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:20,200 INFO L93 Difference]: Finished difference Result 497 states and 1395 transitions. [2022-11-19 08:34:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:34:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:34:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:20,202 INFO L225 Difference]: With dead ends: 497 [2022-11-19 08:34:20,202 INFO L226 Difference]: Without dead ends: 497 [2022-11-19 08:34:20,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:34:20,203 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:20,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-19 08:34:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-19 08:34:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-11-19 08:34:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 464 states have (on average 3.0064655172413794) internal successors, (1395), 496 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1395 transitions. [2022-11-19 08:34:20,214 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1395 transitions. Word has length 8 [2022-11-19 08:34:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:20,214 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1395 transitions. [2022-11-19 08:34:20,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1395 transitions. [2022-11-19 08:34:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:34:20,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:20,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:20,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-19 08:34:20,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:20,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:20,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:20,819 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -300142805, now seen corresponding path program 1 times [2022-11-19 08:34:20,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:20,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330981914] [2022-11-19 08:34:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:20,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:20,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:20,820 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:20,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-19 08:34:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:34:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:20,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:20,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330981914] [2022-11-19 08:34:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330981914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:20,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:20,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:20,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35410614] [2022-11-19 08:34:20,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:20,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:20,940 INFO L87 Difference]: Start difference. First operand 497 states and 1395 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:21,063 INFO L93 Difference]: Finished difference Result 409 states and 1109 transitions. [2022-11-19 08:34:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:34:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:21,065 INFO L225 Difference]: With dead ends: 409 [2022-11-19 08:34:21,065 INFO L226 Difference]: Without dead ends: 409 [2022-11-19 08:34:21,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:21,066 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:21,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-19 08:34:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2022-11-19 08:34:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 385 states have (on average 2.8805194805194807) internal successors, (1109), 408 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1109 transitions. [2022-11-19 08:34:21,075 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1109 transitions. Word has length 8 [2022-11-19 08:34:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:21,076 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 1109 transitions. [2022-11-19 08:34:21,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1109 transitions. [2022-11-19 08:34:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:34:21,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:21,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:21,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:21,285 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -300142804, now seen corresponding path program 1 times [2022-11-19 08:34:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:21,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772678593] [2022-11-19 08:34:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:21,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:21,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:21,287 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:21,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-19 08:34:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:34:21,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:21,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:21,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:21,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772678593] [2022-11-19 08:34:21,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772678593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:21,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:21,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76359847] [2022-11-19 08:34:21,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:21,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:21,451 INFO L87 Difference]: Start difference. First operand 409 states and 1109 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:21,584 INFO L93 Difference]: Finished difference Result 321 states and 823 transitions. [2022-11-19 08:34:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:21,585 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 [2022-11-19 08:34:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:21,586 INFO L225 Difference]: With dead ends: 321 [2022-11-19 08:34:21,586 INFO L226 Difference]: Without dead ends: 307 [2022-11-19 08:34:21,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:21,587 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:21,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-19 08:34:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-11-19 08:34:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 292 states have (on average 2.6952054794520546) internal successors, (787), 306 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 787 transitions. [2022-11-19 08:34:21,592 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 787 transitions. Word has length 8 [2022-11-19 08:34:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:21,593 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 787 transitions. [2022-11-19 08:34:21,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 787 transitions. [2022-11-19 08:34:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:34:21,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:21,594 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:21,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-19 08:34:21,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:21,798 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 136656152, now seen corresponding path program 1 times [2022-11-19 08:34:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:21,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057955056] [2022-11-19 08:34:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:21,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:21,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:21,800 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:21,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-19 08:34:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:34:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:34:21,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:21,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:21,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057955056] [2022-11-19 08:34:21,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057955056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:21,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:21,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:21,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989809253] [2022-11-19 08:34:21,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:21,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:21,921 INFO L87 Difference]: Start difference. First operand 307 states and 787 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:22,113 INFO L93 Difference]: Finished difference Result 315 states and 787 transitions. [2022-11-19 08:34:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:22,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:34:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:22,114 INFO L225 Difference]: With dead ends: 315 [2022-11-19 08:34:22,114 INFO L226 Difference]: Without dead ends: 315 [2022-11-19 08:34:22,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:22,115 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:22,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 7 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-19 08:34:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 299. [2022-11-19 08:34:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 285 states have (on average 2.712280701754386) internal successors, (773), 298 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 773 transitions. [2022-11-19 08:34:22,123 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 773 transitions. Word has length 9 [2022-11-19 08:34:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:22,124 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 773 transitions. [2022-11-19 08:34:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 773 transitions. [2022-11-19 08:34:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:34:22,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:22,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:22,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-19 08:34:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:22,336 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1903204094, now seen corresponding path program 1 times [2022-11-19 08:34:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:22,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465742909] [2022-11-19 08:34:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:22,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:22,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:22,338 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:22,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 08:34:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:22,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:34:22,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:22,595 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:22,596 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 [2022-11-19 08:34:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:22,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:23,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:23,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465742909] [2022-11-19 08:34:23,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465742909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:23,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [318840585] [2022-11-19 08:34:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:23,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:23,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:34:23,589 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:34:23,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-19 08:34:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:34:23,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:23,920 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:23,920 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 [2022-11-19 08:34:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:24,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [318840585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:24,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158521495] [2022-11-19 08:34:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:24,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:24,728 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:24,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 08:34:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:24,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:34:24,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:24,979 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:24,979 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 [2022-11-19 08:34:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:25,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158521495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:25,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:34:25,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-11-19 08:34:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934139592] [2022-11-19 08:34:25,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:25,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:34:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:34:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:34:25,561 INFO L87 Difference]: Start difference. First operand 299 states and 773 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2022-11-19 08:34:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:26,945 INFO L93 Difference]: Finished difference Result 325 states and 873 transitions. [2022-11-19 08:34:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:34:26,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 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 [2022-11-19 08:34:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:26,947 INFO L225 Difference]: With dead ends: 325 [2022-11-19 08:34:26,947 INFO L226 Difference]: Without dead ends: 325 [2022-11-19 08:34:26,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:34:26,948 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:26,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-11-19 08:34:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-19 08:34:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 315. [2022-11-19 08:34:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 301 states have (on average 2.777408637873754) internal successors, (836), 314 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 836 transitions. [2022-11-19 08:34:26,957 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 836 transitions. Word has length 9 [2022-11-19 08:34:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:26,957 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 836 transitions. [2022-11-19 08:34:26,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2022-11-19 08:34:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 836 transitions. [2022-11-19 08:34:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:34:26,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:26,958 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:26,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:27,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-19 08:34:27,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-19 08:34:27,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:27,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1981291173, now seen corresponding path program 2 times [2022-11-19 08:34:27,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:27,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375076578] [2022-11-19 08:34:27,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:27,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:27,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:27,573 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:27,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 08:34:27,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:34:27,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:34:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:27,826 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:27,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:34:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:34:27,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:27,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:27,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375076578] [2022-11-19 08:34:27,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375076578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:27,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:27,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:27,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363462844] [2022-11-19 08:34:27,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:27,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:27,945 INFO L87 Difference]: Start difference. First operand 315 states and 836 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:28,149 INFO L93 Difference]: Finished difference Result 219 states and 541 transitions. [2022-11-19 08:34:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:28,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:34:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:28,150 INFO L225 Difference]: With dead ends: 219 [2022-11-19 08:34:28,150 INFO L226 Difference]: Without dead ends: 219 [2022-11-19 08:34:28,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:28,151 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:28,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-19 08:34:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 173. [2022-11-19 08:34:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 2.4497041420118344) internal successors, (414), 172 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 414 transitions. [2022-11-19 08:34:28,156 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 414 transitions. Word has length 10 [2022-11-19 08:34:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:28,157 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 414 transitions. [2022-11-19 08:34:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 414 transitions. [2022-11-19 08:34:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:34:28,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:28,158 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 08:34:28,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:28,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:28,369 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:34:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1841665348, now seen corresponding path program 3 times [2022-11-19 08:34:28,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:28,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64613488] [2022-11-19 08:34:28,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:34:28,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:28,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:28,371 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:28,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-19 08:34:28,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:34:28,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:28,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:34:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:28,745 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:28,745 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 [2022-11-19 08:34:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:29,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:32,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64613488] [2022-11-19 08:34:32,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64613488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [621918182] [2022-11-19 08:34:32,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:34:32,384 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:32,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:34:32,391 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:34:32,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-19 08:34:33,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:34:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:33,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:34:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:33,272 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:33,272 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 [2022-11-19 08:34:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:33,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:36,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [621918182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203365109] [2022-11-19 08:34:36,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:34:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:36,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:36,924 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:36,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 08:34:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:34:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:34:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:38,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:34:38,805 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 [2022-11-19 08:34:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:38,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:39,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203365109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:39,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:34:39,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-19 08:34:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378206609] [2022-11-19 08:34:39,319 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:39,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:34:39,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:34:39,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:34:39,321 INFO L87 Difference]: Start difference. First operand 173 states and 414 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:03,138 INFO L93 Difference]: Finished difference Result 2783 states and 6998 transitions. [2022-11-19 08:35:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:35:03,139 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:35:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:03,145 INFO L225 Difference]: With dead ends: 2783 [2022-11-19 08:35:03,146 INFO L226 Difference]: Without dead ends: 2783 [2022-11-19 08:35:03,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:35:03,147 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4208 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4208 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:03,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4208 Valid, 383 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2978 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-19 08:35:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2022-11-19 08:35:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 185. [2022-11-19 08:35:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 2.4198895027624308) internal successors, (438), 184 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 438 transitions. [2022-11-19 08:35:03,178 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 438 transitions. Word has length 12 [2022-11-19 08:35:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:03,179 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 438 transitions. [2022-11-19 08:35:03,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 438 transitions. [2022-11-19 08:35:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:35:03,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:03,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:03,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:03,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-19 08:35:03,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-19 08:35:03,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:03,790 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:35:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash 636365336, now seen corresponding path program 1 times [2022-11-19 08:35:03,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:03,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668477943] [2022-11-19 08:35:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:03,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:03,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:03,792 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:03,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 08:35:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:03,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:35:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:03,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:03,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668477943] [2022-11-19 08:35:03,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668477943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:03,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:03,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:03,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246159433] [2022-11-19 08:35:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:03,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:35:03,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:35:03,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:35:03,979 INFO L87 Difference]: Start difference. First operand 185 states and 438 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:04,294 INFO L93 Difference]: Finished difference Result 209 states and 509 transitions. [2022-11-19 08:35:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:35:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:35:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:04,298 INFO L225 Difference]: With dead ends: 209 [2022-11-19 08:35:04,298 INFO L226 Difference]: Without dead ends: 140 [2022-11-19 08:35:04,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:35:04,299 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:04,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:35:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-19 08:35:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2022-11-19 08:35:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 2.476923076923077) internal successors, (322), 133 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2022-11-19 08:35:04,305 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 13 [2022-11-19 08:35:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:04,305 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2022-11-19 08:35:04,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2022-11-19 08:35:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:35:04,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:04,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:04,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:04,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:04,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:35:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2028533270, now seen corresponding path program 1 times [2022-11-19 08:35:04,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:04,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072741588] [2022-11-19 08:35:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:04,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:04,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:04,521 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:04,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 08:35:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:35:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:04,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-19 08:35:04,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:35:04,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:35:04,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-19 08:35:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:05,227 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 166 treesize of output 162 [2022-11-19 08:35:05,388 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:35:05,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 256 treesize of output 164 [2022-11-19 08:35:05,399 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 92 treesize of output 88 [2022-11-19 08:35:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:09,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072741588] [2022-11-19 08:35:09,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072741588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1048818094] [2022-11-19 08:35:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:09,681 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:09,683 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:09,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-19 08:35:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:35:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:35:09,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:09,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1048818094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:09,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:09,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 7] total 15 [2022-11-19 08:35:09,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343476617] [2022-11-19 08:35:09,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:09,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:09,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:35:09,985 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:10,094 INFO L93 Difference]: Finished difference Result 131 states and 316 transitions. [2022-11-19 08:35:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:10,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:35:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:10,096 INFO L225 Difference]: With dead ends: 131 [2022-11-19 08:35:10,096 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 08:35:10,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:35:10,097 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:10,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:35:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 08:35:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-19 08:35:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 128 states have (on average 2.46875) internal successors, (316), 130 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 316 transitions. [2022-11-19 08:35:10,101 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 316 transitions. Word has length 18 [2022-11-19 08:35:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:10,101 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 316 transitions. [2022-11-19 08:35:10,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 316 transitions. [2022-11-19 08:35:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:35:10,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:10,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:10,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:10,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-19 08:35:10,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:10,512 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:35:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2028533269, now seen corresponding path program 1 times [2022-11-19 08:35:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:10,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461831211] [2022-11-19 08:35:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:10,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:10,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:10,514 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:10,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 08:35:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:10,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:35:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:10,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-19 08:35:10,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:35:10,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:35:10,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-19 08:35:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:10,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:11,196 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 166 treesize of output 162 [2022-11-19 08:35:11,372 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:35:11,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 256 treesize of output 164 [2022-11-19 08:35:11,384 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 92 treesize of output 88 [2022-11-19 08:35:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:15,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:15,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461831211] [2022-11-19 08:35:15,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461831211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:15,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [797393125] [2022-11-19 08:35:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:15,767 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:15,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:15,770 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:15,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-19 08:35:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:35:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:35:16,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:16,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [797393125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:16,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:16,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 7] total 15 [2022-11-19 08:35:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292758031] [2022-11-19 08:35:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:16,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:16,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:35:16,219 INFO L87 Difference]: Start difference. First operand 131 states and 316 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:16,370 INFO L93 Difference]: Finished difference Result 128 states and 310 transitions. [2022-11-19 08:35:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:35:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:16,371 INFO L225 Difference]: With dead ends: 128 [2022-11-19 08:35:16,371 INFO L226 Difference]: Without dead ends: 128 [2022-11-19 08:35:16,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:35:16,372 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:16,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:35:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-19 08:35:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-19 08:35:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 2.4603174603174605) internal successors, (310), 127 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 310 transitions. [2022-11-19 08:35:16,375 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 310 transitions. Word has length 18 [2022-11-19 08:35:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:16,375 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 310 transitions. [2022-11-19 08:35:16,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 310 transitions. [2022-11-19 08:35:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:35:16,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:16,377 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-19 08:35:16,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:16,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-19 08:35:16,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:16,779 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:35:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash -531174716, now seen corresponding path program 4 times [2022-11-19 08:35:16,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:16,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886073275] [2022-11-19 08:35:16,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:35:16,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:16,783 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:16,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-19 08:35:17,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:35:17,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:17,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 08:35:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:17,161 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:35:17,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:35:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:18,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:31,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:31,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886073275] [2022-11-19 08:35:31,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886073275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:31,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [381195582] [2022-11-19 08:35:31,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:35:31,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:31,675 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:31,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-19 08:35:32,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:35:32,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:35:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:32,473 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:35:32,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:35:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:34,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:36,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [381195582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:36,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917457494] [2022-11-19 08:35:36,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:35:36,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:36,590 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:36,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-19 08:35:36,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:35:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 08:35:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:37,008 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:35:37,008 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 [2022-11-19 08:35:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:37,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:38,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917457494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:38,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:35:38,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 62 [2022-11-19 08:35:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26029815] [2022-11-19 08:35:38,886 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:38,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-19 08:35:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-19 08:35:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 08:35:38,888 INFO L87 Difference]: Start difference. First operand 128 states and 310 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:07,097 WARN L233 SmtUtils]: Spent 14.67s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:26,197 WARN L233 SmtUtils]: Spent 16.84s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:40,196 WARN L233 SmtUtils]: Spent 11.85s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:22,300 WARN L233 SmtUtils]: Spent 40.70s on a formula simplification. DAG size of input: 254 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:35,778 WARN L233 SmtUtils]: Spent 11.16s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:05,390 WARN L233 SmtUtils]: Spent 28.10s on a formula simplification. DAG size of input: 246 DAG size of output: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:15,535 WARN L233 SmtUtils]: Spent 7.80s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:48,030 WARN L233 SmtUtils]: Spent 30.88s on a formula simplification. DAG size of input: 236 DAG size of output: 236 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:00,158 WARN L233 SmtUtils]: Spent 9.70s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:26,474 WARN L233 SmtUtils]: Spent 24.87s on a formula simplification. DAG size of input: 225 DAG size of output: 225 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:37,143 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:01,971 WARN L233 SmtUtils]: Spent 23.22s on a formula simplification. DAG size of input: 214 DAG size of output: 214 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:09,607 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:33,322 WARN L233 SmtUtils]: Spent 22.19s on a formula simplification. DAG size of input: 203 DAG size of output: 203 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:01,395 WARN L233 SmtUtils]: Spent 19.08s on a formula simplification. DAG size of input: 194 DAG size of output: 193 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:19,988 WARN L233 SmtUtils]: Spent 11.25s on a formula simplification. DAG size of input: 186 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:39,185 WARN L233 SmtUtils]: Spent 10.71s on a formula simplification. DAG size of input: 175 DAG size of output: 171 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:53,802 WARN L233 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 164 DAG size of output: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:42:05,289 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 154 DAG size of output: 150 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:42:17,181 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 143 DAG size of output: 139 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:42:29,752 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 132 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:43:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:43:23,230 INFO L93 Difference]: Finished difference Result 4684 states and 11930 transitions. [2022-11-19 08:43:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-19 08:43:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:43:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:43:23,239 INFO L225 Difference]: With dead ends: 4684 [2022-11-19 08:43:23,239 INFO L226 Difference]: Without dead ends: 4684 [2022-11-19 08:43:23,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 435.1s TimeCoverageRelationStatistics Valid=4079, Invalid=7477, Unknown=0, NotChecked=0, Total=11556 [2022-11-19 08:43:23,242 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 10538 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 14438 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10538 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 14507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 14438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:43:23,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10538 Valid, 2151 Invalid, 14507 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [69 Valid, 14438 Invalid, 0 Unknown, 0 Unchecked, 44.0s Time] [2022-11-19 08:43:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-11-19 08:43:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 152. [2022-11-19 08:43:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 2.3866666666666667) internal successors, (358), 151 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 358 transitions. [2022-11-19 08:43:23,283 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 358 transitions. Word has length 24 [2022-11-19 08:43:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:43:23,283 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 358 transitions. [2022-11-19 08:43:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 358 transitions. [2022-11-19 08:43:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:43:23,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:43:23,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:43:23,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-19 08:43:23,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-19 08:43:23,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-19 08:43:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:43:23,891 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:43:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:43:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 691828609, now seen corresponding path program 1 times [2022-11-19 08:43:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:43:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820463092] [2022-11-19 08:43:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:23,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:43:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:43:23,894 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:43:23,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-19 08:43:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:43:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:24,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:24,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:43:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820463092] [2022-11-19 08:43:24,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820463092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [748319913] [2022-11-19 08:43:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:24,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:43:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:43:24,174 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:43:24,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-19 08:43:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:43:24,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:24,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:24,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [748319913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:24,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101207445] [2022-11-19 08:43:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:24,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:43:24,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:43:24,512 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:43:24,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-19 08:43:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:43:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:24,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101207445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:24,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:43:24,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2022-11-19 08:43:24,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423104439] [2022-11-19 08:43:24,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:43:24,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:43:24,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:43:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:43:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:43:24,816 INFO L87 Difference]: Start difference. First operand 152 states and 358 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:43:25,197 INFO L93 Difference]: Finished difference Result 156 states and 358 transitions. [2022-11-19 08:43:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:43:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:43:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:43:25,199 INFO L225 Difference]: With dead ends: 156 [2022-11-19 08:43:25,199 INFO L226 Difference]: Without dead ends: 156 [2022-11-19 08:43:25,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:43:25,201 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:43:25,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:43:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-19 08:43:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-11-19 08:43:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 2.3194444444444446) internal successors, (334), 145 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 334 transitions. [2022-11-19 08:43:25,206 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 334 transitions. Word has length 24 [2022-11-19 08:43:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:43:25,207 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 334 transitions. [2022-11-19 08:43:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 334 transitions. [2022-11-19 08:43:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:43:25,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:43:25,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:43:25,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-19 08:43:25,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-11-19 08:43:25,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-19 08:43:25,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:43:25,817 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-19 08:43:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:43:25,818 INFO L85 PathProgramCache]: Analyzing trace with hash -836856289, now seen corresponding path program 2 times [2022-11-19 08:43:25,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:43:25,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572357043] [2022-11-19 08:43:25,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:43:25,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:43:25,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:43:25,819 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:43:25,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-19 08:43:26,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:43:26,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:43:26,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:43:26,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:26,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-19 08:43:26,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:43:26,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:43:26,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-19 08:43:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:26,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:26,634 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 166 treesize of output 162 [2022-11-19 08:43:26,862 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:43:26,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 256 treesize of output 164 [2022-11-19 08:43:26,877 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 92 treesize of output 88 [2022-11-19 08:43:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:31,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:43:31,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572357043] [2022-11-19 08:43:31,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572357043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:31,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750313711] [2022-11-19 08:43:31,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:43:31,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:43:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:43:31,621 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:43:31,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2dea47-abdd-439d-99af-934ef8cc3394/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-19 08:43:32,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:43:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:43:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 08:43:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:32,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-19 08:43:32,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:43:32,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:43:33,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:43:33,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-19 08:43:33,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:43:33,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-19 08:43:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:43:33,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:33,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 08:43:33,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-19 08:43:33,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 08:43:33,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-19 08:43:35,689 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (bvmul (_ bv4 32) c_~back~0))) (let ((.cse8 (bvadd c_~queue~0.offset .cse10))) (or (not (bvsge c_~back~0 (_ bv0 32))) (let ((.cse11 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset (_ bv3 32) .cse11)) (.cse2 (bvadd c_~queue~0.offset (_ bv2 32) .cse11)) (.cse3 (bvadd c_~queue~0.offset .cse11 (_ bv1 32))) (.cse4 (bvadd c_~queue~0.offset .cse11)) (.cse5 (bvadd c_~queue~0.offset (_ bv3 32) .cse10)) (.cse6 (bvadd c_~queue~0.offset (_ bv2 32) .cse10)) (.cse7 (bvadd c_~queue~0.offset .cse10 (_ bv1 32)))) (and (forall ((v_ArrVal_1929 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1930 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1929) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1930) c_~queue~0.base))) (or (bvsle (_ bv0 32) (bvadd (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4)) c_~sum~0)) (not (= (concat (concat (concat (select .cse0 .cse5) (select .cse0 .cse6)) (select .cse0 .cse7)) (select .cse0 .cse8)) (_ bv1 32)))))) (forall ((v_ArrVal_1929 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1930 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse9 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1929) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1930) c_~queue~0.base))) (or (bvsle (bvadd (concat (concat (concat (select .cse9 .cse1) (select .cse9 .cse2)) (select .cse9 .cse3)) (select .cse9 .cse4)) c_~sum~0) (_ bv1 32)) (not (= (concat (concat (concat (select .cse9 .cse5) (select .cse9 .cse6)) (select .cse9 .cse7)) (select .cse9 .cse8)) (_ bv1 32))))))))) (not (bvule .cse8 (bvadd c_~queue~0.offset (_ bv4 32) .cse10))) (not (bvslt c_~back~0 c_~n~0))))) is different from false [2022-11-19 08:43:36,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:43:36,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 452 treesize of output 215 [2022-11-19 08:43:37,047 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:43:37,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 756 treesize of output 734 [2022-11-19 08:43:37,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:43:37,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 686 treesize of output 518 [2022-11-19 08:43:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:43:37,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 470 treesize of output 410 [2022-11-19 08:43:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:43:37,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:43:37,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 283 treesize of output 277