./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba --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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- 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-b5237d8 [2022-11-22 01:42:20,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:42:20,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:42:20,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:42:20,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:42:20,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:42:20,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:42:20,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:42:20,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:42:20,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:42:20,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:42:20,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:42:20,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:42:20,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:42:20,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:42:20,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:42:20,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:42:20,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:42:20,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:42:20,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:42:20,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:42:20,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:42:20,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:42:20,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:42:20,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:42:20,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:42:20,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:42:20,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:42:20,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:42:20,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:42:20,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:42:20,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:42:20,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:42:20,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:42:20,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:42:20,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:42:20,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:42:20,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:42:20,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:42:20,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:42:20,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:42:20,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:42:20,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:42:20,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:42:20,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:42:20,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:42:20,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:42:20,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:42:20,589 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:42:20,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:42:20,589 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:42:20,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:42:20,590 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:42:20,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:42:20,591 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:42:20,591 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:42:20,591 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:42:20,591 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:42:20,591 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:42:20,592 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:42:20,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:42:20,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:42:20,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:42:20,593 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:42:20,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:42:20,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:42:20,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:42:20,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:42:20,594 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:42:20,594 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:42:20,595 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:42:20,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:42:20,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:42:20,595 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:42:20,595 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:42:20,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:42:20,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:42:20,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:42:20,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:42:20,596 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:42:20,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:42:20,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:42:20,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:42:20,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:42:20,597 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_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2022-11-22 01:42:20,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:42:20,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:42:20,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:42:20,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:42:20,942 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:42:20,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-22 01:42:24,031 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:42:24,294 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:42:24,294 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-22 01:42:24,305 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data/47a01c102/91fce44b5e644cbda203e49df717ee71/FLAGa06132da0 [2022-11-22 01:42:24,320 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data/47a01c102/91fce44b5e644cbda203e49df717ee71 [2022-11-22 01:42:24,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:42:24,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:42:24,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:42:24,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:42:24,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:42:24,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:42:24" (1/1) ... [2022-11-22 01:42:24,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387a178f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:24, skipping insertion in model container [2022-11-22 01:42:24,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:42:24" (1/1) ... [2022-11-22 01:42:24,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:42:24,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:42:24,559 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-22 01:42:24,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:42:24,605 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) [2022-11-22 01:42:24,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@698d5eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:24, skipping insertion in model container [2022-11-22 01:42:24,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:42:24,607 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 01:42:24,609 INFO L158 Benchmark]: Toolchain (without parser) took 283.85ms. Allocated memory is still 161.5MB. Free memory was 132.0MB in the beginning and 122.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-22 01:42:24,609 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 117.4MB. Free memory is still 71.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:42:24,610 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.45ms. Allocated memory is still 161.5MB. Free memory was 132.0MB in the beginning and 122.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-22 01:42:24,612 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 117.4MB. Free memory is still 71.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.45ms. Allocated memory is still 161.5MB. Free memory was 132.0MB in the beginning and 122.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: 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_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba --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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- 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-b5237d8 [2022-11-22 01:42:26,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:42:26,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:42:26,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:42:26,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:42:26,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:42:26,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:42:26,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:42:26,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:42:26,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:42:26,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:42:26,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:42:26,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:42:27,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:42:27,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:42:27,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:42:27,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:42:27,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:42:27,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:42:27,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:42:27,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:42:27,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:42:27,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:42:27,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:42:27,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:42:27,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:42:27,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:42:27,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:42:27,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:42:27,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:42:27,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:42:27,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:42:27,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:42:27,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:42:27,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:42:27,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:42:27,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:42:27,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:42:27,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:42:27,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:42:27,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:42:27,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 01:42:27,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:42:27,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:42:27,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:42:27,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:42:27,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:42:27,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:42:27,082 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:42:27,082 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:42:27,082 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:42:27,083 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:42:27,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:42:27,084 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:42:27,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:42:27,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:42:27,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:42:27,085 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:42:27,086 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:42:27,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:42:27,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:42:27,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:42:27,086 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:42:27,087 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:42:27,087 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:42:27,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:42:27,087 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:42:27,087 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 01:42:27,088 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 01:42:27,088 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:42:27,088 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:42:27,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:42:27,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 01:42:27,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:42:27,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:42:27,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:42:27,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:42:27,090 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 01:42:27,090 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 01:42:27,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:42:27,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 01:42:27,091 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_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2022-11-22 01:42:27,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:42:27,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:42:27,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:42:27,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:42:27,495 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:42:27,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-22 01:42:30,412 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:42:30,700 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:42:30,701 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-22 01:42:30,714 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data/6b74118ed/e6eafec3e2334f4695cec0f4421236d8/FLAG7d73e3984 [2022-11-22 01:42:30,730 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/data/6b74118ed/e6eafec3e2334f4695cec0f4421236d8 [2022-11-22 01:42:30,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:42:30,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:42:30,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:42:30,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:42:30,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:42:30,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:42:30" (1/1) ... [2022-11-22 01:42:30,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca2d9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:30, skipping insertion in model container [2022-11-22 01:42:30,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:42:30" (1/1) ... [2022-11-22 01:42:30,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:42:30,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:42:31,015 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-22 01:42:31,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:42:31,061 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 01:42:31,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:42:31,105 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-22 01:42:31,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:42:31,127 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:42:31,168 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-22 01:42:31,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:42:31,195 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:42:31,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31 WrapperNode [2022-11-22 01:42:31,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:42:31,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:42:31,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:42:31,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:42:31,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,264 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 185 [2022-11-22 01:42:31,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:42:31,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:42:31,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:42:31,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:42:31,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:42:31,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:42:31,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:42:31,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:42:31,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (1/1) ... [2022-11-22 01:42:31,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:42:31,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:31,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:42:31,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:42:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:42:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 01:42:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:42:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 01:42:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:42:31,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:42:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:42:31,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:42:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 01:42:31,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 01:42:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:42:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:42:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:42:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:42:31,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:42:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:42:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 01:42:31,430 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:42:31,579 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:42:31,581 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:42:32,219 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:42:32,474 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:42:32,475 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:42:32,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:42:32 BoogieIcfgContainer [2022-11-22 01:42:32,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:42:32,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:42:32,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:42:32,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:42:32,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:42:30" (1/3) ... [2022-11-22 01:42:32,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63801e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:42:32, skipping insertion in model container [2022-11-22 01:42:32,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:31" (2/3) ... [2022-11-22 01:42:32,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63801e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:42:32, skipping insertion in model container [2022-11-22 01:42:32,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:42:32" (3/3) ... [2022-11-22 01:42:32,491 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2022-11-22 01:42:32,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:42:32,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-22 01:42:32,510 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:42:32,611 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-22 01:42:32,660 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:42:32,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 174 transitions, 372 flow [2022-11-22 01:42:32,687 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 174 transitions, 372 flow [2022-11-22 01:42:32,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 174 transitions, 372 flow [2022-11-22 01:42:32,795 INFO L130 PetriNetUnfolder]: 12/171 cut-off events. [2022-11-22 01:42:32,796 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-22 01:42:32,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 12/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 172 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2022-11-22 01:42:32,808 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2022-11-22 01:43:04,916 INFO L134 LiptonReduction]: Checked pairs total: 3015 [2022-11-22 01:43:04,916 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-11-22 01:43:04,924 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2022-11-22 01:43:05,014 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:05,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:43:05,043 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;@822f920, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:43:05,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-22 01:43:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:43:05,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:05,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:43:05,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash 27028, now seen corresponding path program 1 times [2022-11-22 01:43:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:05,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473717492] [2022-11-22 01:43:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:05,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:05,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:05,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:05,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:43:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:05,481 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-22 01:43:05,482 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 [2022-11-22 01:43:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:05,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:05,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:05,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473717492] [2022-11-22 01:43:05,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473717492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:05,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:05,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:05,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938307354] [2022-11-22 01:43:05,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:05,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:05,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:05,627 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 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) [2022-11-22 01:43:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:05,898 INFO L93 Difference]: Finished difference Result 623 states and 2064 transitions. [2022-11-22 01:43:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:05,901 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 [2022-11-22 01:43:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:05,919 INFO L225 Difference]: With dead ends: 623 [2022-11-22 01:43:05,919 INFO L226 Difference]: Without dead ends: 623 [2022-11-22 01:43:05,920 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 [2022-11-22 01:43:05,924 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:05,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:43:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-22 01:43:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-11-22 01:43:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 518 states have (on average 3.9845559845559846) internal successors, (2064), 622 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2064 transitions. [2022-11-22 01:43:06,052 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2064 transitions. Word has length 2 [2022-11-22 01:43:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:06,054 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 2064 transitions. [2022-11-22 01:43:06,055 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) [2022-11-22 01:43:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2064 transitions. [2022-11-22 01:43:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:43:06,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:06,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:43:06,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:06,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:06,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:06,272 INFO L85 PathProgramCache]: Analyzing trace with hash 27030, now seen corresponding path program 1 times [2022-11-22 01:43:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:06,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683900693] [2022-11-22 01:43:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:06,273 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 [2022-11-22 01:43:06,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:06,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:06,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:43:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:06,532 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-22 01:43:06,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:43:06,604 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-22 01:43:06,605 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 [2022-11-22 01:43:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:06,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:06,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:06,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683900693] [2022-11-22 01:43:06,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683900693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:06,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:06,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:06,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398428569] [2022-11-22 01:43:06,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:06,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:06,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:06,670 INFO L87 Difference]: Start difference. First operand 623 states and 2064 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) [2022-11-22 01:43:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:06,912 INFO L93 Difference]: Finished difference Result 497 states and 1563 transitions. [2022-11-22 01:43:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:06,913 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 [2022-11-22 01:43:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:06,917 INFO L225 Difference]: With dead ends: 497 [2022-11-22 01:43:06,917 INFO L226 Difference]: Without dead ends: 497 [2022-11-22 01:43:06,917 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 [2022-11-22 01:43:06,919 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:06,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:43:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-22 01:43:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-11-22 01:43:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 420 states have (on average 3.7214285714285715) internal successors, (1563), 496 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1563 transitions. [2022-11-22 01:43:06,940 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1563 transitions. Word has length 2 [2022-11-22 01:43:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:06,941 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1563 transitions. [2022-11-22 01:43:06,941 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) [2022-11-22 01:43:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1563 transitions. [2022-11-22 01:43:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:43:06,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:06,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:43:06,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 01:43:07,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:07,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash 26871, now seen corresponding path program 1 times [2022-11-22 01:43:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:07,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951464674] [2022-11-22 01:43:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:07,156 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 [2022-11-22 01:43:07,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:07,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:07,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:43:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:07,350 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:43:07,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:43:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:07,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:07,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951464674] [2022-11-22 01:43:07,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951464674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:07,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:07,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:07,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511958955] [2022-11-22 01:43:07,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:07,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:07,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:07,380 INFO L87 Difference]: Start difference. First operand 497 states and 1563 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) [2022-11-22 01:43:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:07,574 INFO L93 Difference]: Finished difference Result 496 states and 1562 transitions. [2022-11-22 01:43:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:07,575 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 [2022-11-22 01:43:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:07,579 INFO L225 Difference]: With dead ends: 496 [2022-11-22 01:43:07,579 INFO L226 Difference]: Without dead ends: 496 [2022-11-22 01:43:07,579 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 [2022-11-22 01:43:07,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:07,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:43:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-22 01:43:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2022-11-22 01:43:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 420 states have (on average 3.719047619047619) internal successors, (1562), 495 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1562 transitions. [2022-11-22 01:43:07,627 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1562 transitions. Word has length 2 [2022-11-22 01:43:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:07,627 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 1562 transitions. [2022-11-22 01:43:07,628 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) [2022-11-22 01:43:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1562 transitions. [2022-11-22 01:43:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:43:07,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:07,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:43:07,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:07,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:07,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash 26872, now seen corresponding path program 1 times [2022-11-22 01:43:07,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:07,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803514630] [2022-11-22 01:43:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:07,842 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 [2022-11-22 01:43:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:07,848 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:07,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:43:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:08,075 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:08,075 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 [2022-11-22 01:43:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:08,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:08,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:08,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803514630] [2022-11-22 01:43:08,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803514630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:08,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:08,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:08,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117240097] [2022-11-22 01:43:08,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:08,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:08,119 INFO L87 Difference]: Start difference. First operand 496 states and 1562 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) [2022-11-22 01:43:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:08,519 INFO L93 Difference]: Finished difference Result 990 states and 3122 transitions. [2022-11-22 01:43:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:08,520 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 [2022-11-22 01:43:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:08,527 INFO L225 Difference]: With dead ends: 990 [2022-11-22 01:43:08,528 INFO L226 Difference]: Without dead ends: 990 [2022-11-22 01:43:08,528 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 [2022-11-22 01:43:08,529 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:08,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 6 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:43:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-22 01:43:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 497. [2022-11-22 01:43:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 421 states have (on average 3.7149643705463182) internal successors, (1564), 496 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1564 transitions. [2022-11-22 01:43:08,554 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1564 transitions. Word has length 2 [2022-11-22 01:43:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:08,555 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1564 transitions. [2022-11-22 01:43:08,555 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) [2022-11-22 01:43:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1564 transitions. [2022-11-22 01:43:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:43:08,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:08,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:43:08,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:08,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:08,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash 837894, now seen corresponding path program 1 times [2022-11-22 01:43:08,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:08,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420874101] [2022-11-22 01:43:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:08,773 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 [2022-11-22 01:43:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:08,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:08,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:43:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:09,010 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:09,011 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 [2022-11-22 01:43:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:09,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:09,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420874101] [2022-11-22 01:43:09,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420874101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1772987882] [2022-11-22 01:43:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:43:09,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:43:09,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:43:09,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 01:43:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:43:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:09,643 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:09,643 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 [2022-11-22 01:43:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:09,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:09,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1772987882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033513916] [2022-11-22 01:43:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:09,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:09,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:09,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:09,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:43:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:09,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:43:09,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:10,054 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:10,055 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 [2022-11-22 01:43:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:10,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:10,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033513916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:10,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:43:10,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-22 01:43:10,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140587196] [2022-11-22 01:43:10,254 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:10,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:43:10,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:43:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:43:10,256 INFO L87 Difference]: Start difference. First operand 497 states and 1564 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) [2022-11-22 01:43:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:11,910 INFO L93 Difference]: Finished difference Result 1979 states and 6244 transitions. [2022-11-22 01:43:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:43:11,912 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 [2022-11-22 01:43:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:11,925 INFO L225 Difference]: With dead ends: 1979 [2022-11-22 01:43:11,925 INFO L226 Difference]: Without dead ends: 1979 [2022-11-22 01:43:11,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:43:11,927 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 287 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:11,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 15 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:43:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-22 01:43:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 500. [2022-11-22 01:43:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.702830188679245) internal successors, (1570), 499 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1570 transitions. [2022-11-22 01:43:11,960 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1570 transitions. Word has length 3 [2022-11-22 01:43:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:11,960 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1570 transitions. [2022-11-22 01:43:11,960 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) [2022-11-22 01:43:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1570 transitions. [2022-11-22 01:43:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:43:11,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:11,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:43:11,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:12,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:12,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:12,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:12,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 25995132, now seen corresponding path program 1 times [2022-11-22 01:43:12,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:12,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904134029] [2022-11-22 01:43:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:12,569 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 [2022-11-22 01:43:12,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:12,570 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:12,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-22 01:43:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:43:12,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:12,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:12,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:12,782 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-22 01:43:12,783 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 [2022-11-22 01:43:12,804 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 [2022-11-22 01:43:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:12,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:12,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:12,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904134029] [2022-11-22 01:43:12,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904134029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:12,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:12,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352562244] [2022-11-22 01:43:12,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:12,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:12,882 INFO L87 Difference]: Start difference. First operand 500 states and 1570 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) [2022-11-22 01:43:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:13,087 INFO L93 Difference]: Finished difference Result 470 states and 1485 transitions. [2022-11-22 01:43:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:13,087 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 [2022-11-22 01:43:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:13,091 INFO L225 Difference]: With dead ends: 470 [2022-11-22 01:43:13,091 INFO L226 Difference]: Without dead ends: 470 [2022-11-22 01:43:13,091 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 [2022-11-22 01:43:13,092 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:13,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:43:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-22 01:43:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-11-22 01:43:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6576354679802954) internal successors, (1485), 469 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1485 transitions. [2022-11-22 01:43:13,110 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1485 transitions. Word has length 4 [2022-11-22 01:43:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:13,110 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1485 transitions. [2022-11-22 01:43:13,110 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) [2022-11-22 01:43:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1485 transitions. [2022-11-22 01:43:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:43:13,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:13,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:43:13,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:13,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash 25995133, now seen corresponding path program 1 times [2022-11-22 01:43:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:13,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250065862] [2022-11-22 01:43:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:13,324 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 [2022-11-22 01:43:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:13,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:13,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-22 01:43:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:13,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:43:13,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:13,491 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-22 01:43:13,491 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 44 [2022-11-22 01:43:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:13,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:13,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:13,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250065862] [2022-11-22 01:43:13,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250065862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:13,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:13,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:13,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858595971] [2022-11-22 01:43:13,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:13,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:13,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:13,529 INFO L87 Difference]: Start difference. First operand 470 states and 1485 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) [2022-11-22 01:43:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:13,693 INFO L93 Difference]: Finished difference Result 440 states and 1400 transitions. [2022-11-22 01:43:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:13,693 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 [2022-11-22 01:43:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:13,697 INFO L225 Difference]: With dead ends: 440 [2022-11-22 01:43:13,697 INFO L226 Difference]: Without dead ends: 440 [2022-11-22 01:43:13,697 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 [2022-11-22 01:43:13,698 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:13,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:43:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-22 01:43:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-22 01:43:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6082474226804124) internal successors, (1400), 439 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1400 transitions. [2022-11-22 01:43:13,713 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1400 transitions. Word has length 4 [2022-11-22 01:43:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:13,714 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1400 transitions. [2022-11-22 01:43:13,714 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) [2022-11-22 01:43:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1400 transitions. [2022-11-22 01:43:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:43:13,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:13,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:43:13,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:13,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:13,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 805844397, now seen corresponding path program 1 times [2022-11-22 01:43:13,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:13,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614418935] [2022-11-22 01:43:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:13,928 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 [2022-11-22 01:43:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:13,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:13,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:43:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:14,117 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:43:14,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:43:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:14,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:14,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614418935] [2022-11-22 01:43:14,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614418935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:14,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:14,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:43:14,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809486790] [2022-11-22 01:43:14,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:14,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:43:14,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:14,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:43:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:43:14,151 INFO L87 Difference]: Start difference. First operand 440 states and 1400 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:14,356 INFO L93 Difference]: Finished difference Result 258 states and 799 transitions. [2022-11-22 01:43:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:43:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:43:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:14,358 INFO L225 Difference]: With dead ends: 258 [2022-11-22 01:43:14,358 INFO L226 Difference]: Without dead ends: 258 [2022-11-22 01:43:14,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:43:14,359 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:14,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:43:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-22 01:43:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-11-22 01:43:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 237 states have (on average 3.371308016877637) internal successors, (799), 257 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 799 transitions. [2022-11-22 01:43:14,369 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 799 transitions. Word has length 5 [2022-11-22 01:43:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:14,369 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 799 transitions. [2022-11-22 01:43:14,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 799 transitions. [2022-11-22 01:43:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:43:14,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:14,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:43:14,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:14,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:14,582 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 805844398, now seen corresponding path program 1 times [2022-11-22 01:43:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:14,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023622322] [2022-11-22 01:43:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:14,583 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 [2022-11-22 01:43:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:14,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:14,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:43:14,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:14,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:14,806 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 [2022-11-22 01:43:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:14,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:14,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:14,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023622322] [2022-11-22 01:43:14,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023622322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:14,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:14,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:43:14,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054257427] [2022-11-22 01:43:14,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:14,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:43:14,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:14,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:43:14,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:43:14,921 INFO L87 Difference]: Start difference. First operand 258 states and 799 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-22 01:43:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:15,307 INFO L93 Difference]: Finished difference Result 408 states and 1257 transitions. [2022-11-22 01:43:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:43:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2022-11-22 01:43:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:15,311 INFO L225 Difference]: With dead ends: 408 [2022-11-22 01:43:15,311 INFO L226 Difference]: Without dead ends: 408 [2022-11-22 01:43:15,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:43:15,312 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:15,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 7 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:43:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-22 01:43:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 308. [2022-11-22 01:43:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 287 states have (on average 3.529616724738676) internal successors, (1013), 307 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1013 transitions. [2022-11-22 01:43:15,330 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1013 transitions. Word has length 5 [2022-11-22 01:43:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:15,330 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 1013 transitions. [2022-11-22 01:43:15,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-22 01:43:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1013 transitions. [2022-11-22 01:43:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:43:15,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:15,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:43:15,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:15,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:15,543 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -788622522, now seen corresponding path program 1 times [2022-11-22 01:43:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:15,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999491152] [2022-11-22 01:43:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:15,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:15,545 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:15,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:43:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:15,775 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:15,776 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 [2022-11-22 01:43:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:15,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:15,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:15,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999491152] [2022-11-22 01:43:15,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999491152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:15,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:15,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:43:15,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462848169] [2022-11-22 01:43:15,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:15,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:43:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:43:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:43:15,938 INFO L87 Difference]: Start difference. First operand 308 states and 1013 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:16,613 INFO L93 Difference]: Finished difference Result 509 states and 1506 transitions. [2022-11-22 01:43:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:43:16,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:43:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:16,616 INFO L225 Difference]: With dead ends: 509 [2022-11-22 01:43:16,617 INFO L226 Difference]: Without dead ends: 509 [2022-11-22 01:43:16,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:43:16,617 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:16,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 13 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:43:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-11-22 01:43:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 479. [2022-11-22 01:43:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 458 states have (on average 3.2401746724890828) internal successors, (1484), 478 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1484 transitions. [2022-11-22 01:43:16,635 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1484 transitions. Word has length 6 [2022-11-22 01:43:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:16,635 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 1484 transitions. [2022-11-22 01:43:16,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1484 transitions. [2022-11-22 01:43:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:43:16,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:16,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:43:16,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:16,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -788459601, now seen corresponding path program 1 times [2022-11-22 01:43:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:16,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108593293] [2022-11-22 01:43:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:16,849 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 [2022-11-22 01:43:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:16,850 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:16,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:16,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:43:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:17,019 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 01:43:17,019 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 [2022-11-22 01:43:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:17,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:17,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108593293] [2022-11-22 01:43:17,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108593293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:17,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:17,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241088048] [2022-11-22 01:43:17,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:17,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:17,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:17,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:17,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:17,052 INFO L87 Difference]: Start difference. First operand 479 states and 1484 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) [2022-11-22 01:43:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:17,208 INFO L93 Difference]: Finished difference Result 443 states and 1378 transitions. [2022-11-22 01:43:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:17,208 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 [2022-11-22 01:43:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:17,211 INFO L225 Difference]: With dead ends: 443 [2022-11-22 01:43:17,211 INFO L226 Difference]: Without dead ends: 443 [2022-11-22 01:43:17,212 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 [2022-11-22 01:43:17,212 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:17,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:43:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-22 01:43:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-11-22 01:43:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 428 states have (on average 3.2196261682242993) internal successors, (1378), 442 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1378 transitions. [2022-11-22 01:43:17,227 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1378 transitions. Word has length 6 [2022-11-22 01:43:17,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:17,227 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 1378 transitions. [2022-11-22 01:43:17,228 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) [2022-11-22 01:43:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1378 transitions. [2022-11-22 01:43:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:43:17,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:17,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:43:17,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 01:43:17,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:17,440 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -788459599, now seen corresponding path program 1 times [2022-11-22 01:43:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770070003] [2022-11-22 01:43:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:17,441 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 [2022-11-22 01:43:17,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:17,442 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:17,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:43:17,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:17,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:17,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:17,663 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-22 01:43:17,663 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 [2022-11-22 01:43:17,673 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 [2022-11-22 01:43:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:17,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:17,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:17,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770070003] [2022-11-22 01:43:17,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770070003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:17,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:17,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:43:17,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938603538] [2022-11-22 01:43:17,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:17,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:43:17,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:43:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:43:17,711 INFO L87 Difference]: Start difference. First operand 443 states and 1378 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) [2022-11-22 01:43:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:17,848 INFO L93 Difference]: Finished difference Result 407 states and 1272 transitions. [2022-11-22 01:43:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:43:17,849 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 [2022-11-22 01:43:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:17,852 INFO L225 Difference]: With dead ends: 407 [2022-11-22 01:43:17,852 INFO L226 Difference]: Without dead ends: 407 [2022-11-22 01:43:17,852 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 [2022-11-22 01:43:17,853 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:17,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:43:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-22 01:43:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-11-22 01:43:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 398 states have (on average 3.1959798994974875) internal successors, (1272), 406 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1272 transitions. [2022-11-22 01:43:17,867 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1272 transitions. Word has length 6 [2022-11-22 01:43:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:17,867 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 1272 transitions. [2022-11-22 01:43:17,867 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) [2022-11-22 01:43:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1272 transitions. [2022-11-22 01:43:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:43:17,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:17,868 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 01:43:17,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:18,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:18,081 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash -803275656, now seen corresponding path program 2 times [2022-11-22 01:43:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358314235] [2022-11-22 01:43:18,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:43:18,082 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 [2022-11-22 01:43:18,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:18,083 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:18,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-22 01:43:18,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:43:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:43:18,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:43:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:18,337 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:18,338 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 [2022-11-22 01:43:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:18,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:19,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:19,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358314235] [2022-11-22 01:43:19,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358314235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:19,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [72593396] [2022-11-22 01:43:19,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:43:19,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:43:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:43:19,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:43:19,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-22 01:43:19,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:43:19,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:43:19,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:43:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:19,573 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:19,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:43:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:20,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [72593396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33734027] [2022-11-22 01:43:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:43:20,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:20,651 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:20,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:43:20,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:43:20,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:43:20,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:43:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:20,924 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:20,924 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 [2022-11-22 01:43:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:21,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:21,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33734027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:21,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:43:21,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-22 01:43:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126799909] [2022-11-22 01:43:21,235 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:43:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:43:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:43:21,236 INFO L87 Difference]: Start difference. First operand 407 states and 1272 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:25,891 INFO L93 Difference]: Finished difference Result 2459 states and 8158 transitions. [2022-11-22 01:43:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:43:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:43:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:25,904 INFO L225 Difference]: With dead ends: 2459 [2022-11-22 01:43:25,904 INFO L226 Difference]: Without dead ends: 2459 [2022-11-22 01:43:25,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:43:25,905 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 934 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:25,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 93 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 01:43:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-11-22 01:43:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 413. [2022-11-22 01:43:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 404 states have (on average 3.1782178217821784) internal successors, (1284), 412 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1284 transitions. [2022-11-22 01:43:25,941 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1284 transitions. Word has length 6 [2022-11-22 01:43:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:25,941 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 1284 transitions. [2022-11-22 01:43:25,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1284 transitions. [2022-11-22 01:43:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:43:25,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:25,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:25,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:26,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:26,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:26,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:26,556 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:26,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1327551453, now seen corresponding path program 1 times [2022-11-22 01:43:26,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:26,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688985185] [2022-11-22 01:43:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:26,557 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 [2022-11-22 01:43:26,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:26,558 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:26,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-22 01:43:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:43:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:26,830 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:26,830 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 [2022-11-22 01:43:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:27,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:27,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:27,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688985185] [2022-11-22 01:43:27,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688985185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:27,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:27,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:43:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83238119] [2022-11-22 01:43:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:27,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:43:27,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:43:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:43:27,010 INFO L87 Difference]: Start difference. First operand 413 states and 1284 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:27,456 INFO L93 Difference]: Finished difference Result 509 states and 1608 transitions. [2022-11-22 01:43:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:43:27,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:43:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:27,460 INFO L225 Difference]: With dead ends: 509 [2022-11-22 01:43:27,461 INFO L226 Difference]: Without dead ends: 509 [2022-11-22 01:43:27,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:43:27,462 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 78 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:27,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 4 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:43:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-11-22 01:43:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 441. [2022-11-22 01:43:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 432 states have (on average 3.3425925925925926) internal successors, (1444), 440 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1444 transitions. [2022-11-22 01:43:27,477 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1444 transitions. Word has length 7 [2022-11-22 01:43:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:27,477 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 1444 transitions. [2022-11-22 01:43:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1444 transitions. [2022-11-22 01:43:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:43:27,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:27,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:27,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-22 01:43:27,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:27,695 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash 882916436, now seen corresponding path program 1 times [2022-11-22 01:43:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:27,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637588314] [2022-11-22 01:43:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:27,696 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 [2022-11-22 01:43:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:27,697 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:27,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-22 01:43:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:27,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:43:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:27,950 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:27,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:43:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:43:28,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:43:28,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637588314] [2022-11-22 01:43:28,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637588314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303980753] [2022-11-22 01:43:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:28,564 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:43:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:43:28,567 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:43:28,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-22 01:43:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:28,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:43:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:28,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:29,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [303980753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:29,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170973568] [2022-11-22 01:43:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:29,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:29,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:43:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:29,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:43:29,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:29,439 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:29,439 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 [2022-11-22 01:43:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:43:29,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:43:29,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170973568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:29,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:43:29,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 20 [2022-11-22 01:43:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365374072] [2022-11-22 01:43:29,894 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:29,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:43:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:43:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:43:29,895 INFO L87 Difference]: Start difference. First operand 441 states and 1444 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:35,068 INFO L93 Difference]: Finished difference Result 1176 states and 3771 transitions. [2022-11-22 01:43:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:43:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:43:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:35,076 INFO L225 Difference]: With dead ends: 1176 [2022-11-22 01:43:35,076 INFO L226 Difference]: Without dead ends: 1176 [2022-11-22 01:43:35,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:43:35,077 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 857 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:35,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 114 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 01:43:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-11-22 01:43:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 778. [2022-11-22 01:43:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 769 states have (on average 3.6163849154746424) internal successors, (2781), 777 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2781 transitions. [2022-11-22 01:43:35,119 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2781 transitions. Word has length 7 [2022-11-22 01:43:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:35,119 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 2781 transitions. [2022-11-22 01:43:35,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2781 transitions. [2022-11-22 01:43:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:43:35,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:35,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:35,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:35,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:35,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-11-22 01:43:35,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:43:35,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash 176824410, now seen corresponding path program 1 times [2022-11-22 01:43:35,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:35,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414729750] [2022-11-22 01:43:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:35,730 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 [2022-11-22 01:43:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:35,731 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:35,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:43:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:35,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:43:35,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414729750] [2022-11-22 01:43:35,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414729750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:43:35,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:43:35,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:43:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748330519] [2022-11-22 01:43:35,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:43:35,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:43:35,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:35,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:43:35,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:43:35,978 INFO L87 Difference]: Start difference. First operand 778 states and 2781 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:36,454 INFO L93 Difference]: Finished difference Result 822 states and 2848 transitions. [2022-11-22 01:43:36,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:43:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:43:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:36,460 INFO L225 Difference]: With dead ends: 822 [2022-11-22 01:43:36,460 INFO L226 Difference]: Without dead ends: 822 [2022-11-22 01:43:36,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:43:36,461 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:36,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:43:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-11-22 01:43:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 804. [2022-11-22 01:43:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 795 states have (on average 3.5522012578616353) internal successors, (2824), 803 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2824 transitions. [2022-11-22 01:43:36,493 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2824 transitions. Word has length 9 [2022-11-22 01:43:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:36,494 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 2824 transitions. [2022-11-22 01:43:36,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2824 transitions. [2022-11-22 01:43:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:43:36,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:36,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:36,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:36,708 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1764405049, now seen corresponding path program 1 times [2022-11-22 01:43:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:36,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812541836] [2022-11-22 01:43:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:36,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:43:36,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:36,710 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:36,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:43:36,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:36,979 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:36,979 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 [2022-11-22 01:43:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:43:37,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:43:37,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812541836] [2022-11-22 01:43:37,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812541836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933807936] [2022-11-22 01:43:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:43:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:43:37,746 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:43:37,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-22 01:43:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:43:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:38,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:38,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933807936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:38,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122154716] [2022-11-22 01:43:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:38,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:38,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:38,550 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:38,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 01:43:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:43:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:38,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:39,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122154716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:39,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:43:39,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-22 01:43:39,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080893886] [2022-11-22 01:43:39,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:39,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:43:39,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:39,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:43:39,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:43:39,017 INFO L87 Difference]: Start difference. First operand 804 states and 2824 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2022-11-22 01:43:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:49,741 INFO L93 Difference]: Finished difference Result 1476 states and 5044 transitions. [2022-11-22 01:43:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:43:49,742 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 9 [2022-11-22 01:43:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:49,751 INFO L225 Difference]: With dead ends: 1476 [2022-11-22 01:43:49,751 INFO L226 Difference]: Without dead ends: 1476 [2022-11-22 01:43:49,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:43:49,753 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 823 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:49,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 60 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-22 01:43:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-11-22 01:43:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1084. [2022-11-22 01:43:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1075 states have (on average 3.822325581395349) internal successors, (4109), 1083 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 4109 transitions. [2022-11-22 01:43:49,804 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 4109 transitions. Word has length 9 [2022-11-22 01:43:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:49,805 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 4109 transitions. [2022-11-22 01:43:49,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2022-11-22 01:43:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 4109 transitions. [2022-11-22 01:43:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:43:49,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:49,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:49,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:43:50,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-22 01:43:50,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-22 01:43:50,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:43:50,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:43:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1143092364, now seen corresponding path program 1 times [2022-11-22 01:43:50,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:43:50,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287635767] [2022-11-22 01:43:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:50,420 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 [2022-11-22 01:43:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:43:50,421 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:43:50,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-22 01:43:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:43:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:50,683 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:50,683 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 [2022-11-22 01:43:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:50,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:51,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:43:51,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287635767] [2022-11-22 01:43:51,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287635767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:51,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892608125] [2022-11-22 01:43:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:51,922 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:43:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:43:51,927 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:43:51,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-22 01:43:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:52,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:43:52,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:52,254 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:52,254 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 [2022-11-22 01:43:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:52,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:52,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [892608125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:52,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892607525] [2022-11-22 01:43:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:52,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:52,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:52,899 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:52,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-22 01:43:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:43:53,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:53,174 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:43:53,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:43:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:53,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:43:53,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892607525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:53,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:43:53,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-22 01:43:53,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853348765] [2022-11-22 01:43:53,707 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:43:53,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:43:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:43:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:43:53,709 INFO L87 Difference]: Start difference. First operand 1084 states and 4109 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-22 01:44:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:44:00,289 INFO L93 Difference]: Finished difference Result 2077 states and 8206 transitions. [2022-11-22 01:44:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:44:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 10 [2022-11-22 01:44:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:44:00,303 INFO L225 Difference]: With dead ends: 2077 [2022-11-22 01:44:00,304 INFO L226 Difference]: Without dead ends: 2077 [2022-11-22 01:44:00,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:44:00,305 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:44:00,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 43 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 01:44:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-11-22 01:44:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1523. [2022-11-22 01:44:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1514 states have (on average 3.9947159841479523) internal successors, (6048), 1522 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 6048 transitions. [2022-11-22 01:44:00,356 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 6048 transitions. Word has length 10 [2022-11-22 01:44:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:44:00,357 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 6048 transitions. [2022-11-22 01:44:00,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-22 01:44:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 6048 transitions. [2022-11-22 01:44:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:44:00,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:44:00,358 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-22 01:44:00,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:00,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:00,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-22 01:44:00,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:44:00,970 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:44:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:44:00,971 INFO L85 PathProgramCache]: Analyzing trace with hash 478241262, now seen corresponding path program 2 times [2022-11-22 01:44:00,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:44:00,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459941016] [2022-11-22 01:44:00,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:44:00,972 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 [2022-11-22 01:44:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:44:00,973 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:44:00,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:44:01,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:44:01,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:44:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:44:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:01,292 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:44:01,293 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 [2022-11-22 01:44:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:01,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:03,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:44:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459941016] [2022-11-22 01:44:03,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459941016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1502178333] [2022-11-22 01:44:03,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:44:03,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:44:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:44:03,382 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:44:03,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-22 01:44:03,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:44:03,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:44:03,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:44:03,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:44:04,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:44:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1502178333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314188557] [2022-11-22 01:44:05,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:44:05,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:44:05,176 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:44:05,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 01:44:05,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:44:05,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:44:05,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:44:05,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:05,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:06,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314188557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:06,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:44:06,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 45 [2022-11-22 01:44:06,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963314326] [2022-11-22 01:44:06,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:44:06,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-22 01:44:06,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:44:06,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-22 01:44:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:44:06,652 INFO L87 Difference]: Start difference. First operand 1523 states and 6048 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:44:35,423 INFO L93 Difference]: Finished difference Result 4129 states and 15454 transitions. [2022-11-22 01:44:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 01:44:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:44:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:44:35,443 INFO L225 Difference]: With dead ends: 4129 [2022-11-22 01:44:35,443 INFO L226 Difference]: Without dead ends: 4129 [2022-11-22 01:44:35,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=1616, Invalid=5026, Unknown=0, NotChecked=0, Total=6642 [2022-11-22 01:44:35,445 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1378 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 3356 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:44:35,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 522 Invalid, 3421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3356 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2022-11-22 01:44:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-11-22 01:44:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 2193. [2022-11-22 01:44:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2184 states have (on average 4.084249084249084) internal successors, (8920), 2192 states have internal predecessors, (8920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 8920 transitions. [2022-11-22 01:44:35,564 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 8920 transitions. Word has length 11 [2022-11-22 01:44:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:44:35,565 INFO L495 AbstractCegarLoop]: Abstraction has 2193 states and 8920 transitions. [2022-11-22 01:44:35,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 8920 transitions. [2022-11-22 01:44:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:44:35,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:44:35,567 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:44:35,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:35,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:35,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-22 01:44:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:36,181 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:44:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:44:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1946695891, now seen corresponding path program 1 times [2022-11-22 01:44:36,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:44:36,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587217526] [2022-11-22 01:44:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:36,182 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 [2022-11-22 01:44:36,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:44:36,183 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:44:36,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-22 01:44:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:44:36,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:36,514 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:44:36,515 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 [2022-11-22 01:44:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:36,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:39,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:44:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587217526] [2022-11-22 01:44:39,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587217526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [812175687] [2022-11-22 01:44:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:39,073 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:44:39,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:44:39,074 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:44:39,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-22 01:44:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:39,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:44:39,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:39,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:44:39,494 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 [2022-11-22 01:44:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:40,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:43,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [812175687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338884057] [2022-11-22 01:44:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:43,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:44:43,562 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:44:43,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-22 01:44:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 01:44:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:43,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:44:43,885 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 [2022-11-22 01:44:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:44,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:46,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338884057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:46,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:44:46,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 23 [2022-11-22 01:44:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197468416] [2022-11-22 01:44:46,611 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:44:46,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:44:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:44:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:44:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:44:46,612 INFO L87 Difference]: Start difference. First operand 2193 states and 8920 transitions. Second operand has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:45:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:45:16,117 INFO L93 Difference]: Finished difference Result 3815 states and 15728 transitions. [2022-11-22 01:45:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:45:16,120 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2022-11-22 01:45:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:45:16,137 INFO L225 Difference]: With dead ends: 3815 [2022-11-22 01:45:16,137 INFO L226 Difference]: Without dead ends: 3815 [2022-11-22 01:45:16,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=553, Invalid=1517, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:45:16,139 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 845 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:45:16,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 161 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-22 01:45:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3815 states. [2022-11-22 01:45:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3815 to 2833. [2022-11-22 01:45:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2824 states have (on average 4.317988668555241) internal successors, (12194), 2832 states have internal predecessors, (12194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:45:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 12194 transitions. [2022-11-22 01:45:16,291 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 12194 transitions. Word has length 12 [2022-11-22 01:45:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:45:16,291 INFO L495 AbstractCegarLoop]: Abstraction has 2833 states and 12194 transitions. [2022-11-22 01:45:16,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:45:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 12194 transitions. [2022-11-22 01:45:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:45:16,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:45:16,295 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 01:45:16,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-22 01:45:16,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-22 01:45:16,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-22 01:45:16,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:45:16,908 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:45:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:45:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1391062600, now seen corresponding path program 3 times [2022-11-22 01:45:16,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:45:16,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039691968] [2022-11-22 01:45:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:45:16,910 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 [2022-11-22 01:45:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:45:16,911 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:45:16,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:45:17,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:45:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:45:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:45:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:17,365 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:45:17,366 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 [2022-11-22 01:45:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:17,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:45:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:21,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:45:21,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039691968] [2022-11-22 01:45:21,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039691968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:45:21,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801261435] [2022-11-22 01:45:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:45:21,103 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:45:21,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:45:21,104 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:45:21,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-22 01:45:21,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:45:21,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:45:21,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:45:21,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:22,091 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:45:22,091 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 [2022-11-22 01:45:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:22,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:45:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:22,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [801261435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:45:22,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573095184] [2022-11-22 01:45:22,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:45:22,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:45:22,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:45:22,751 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:45:22,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-22 01:45:24,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:45:24,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:45:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:45:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:24,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:45:24,896 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 [2022-11-22 01:45:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:25,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:45:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:25,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573095184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:45:25,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:45:25,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-22 01:45:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248463542] [2022-11-22 01:45:25,502 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:45:25,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:45:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:45:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:45:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:45:25,503 INFO L87 Difference]: Start difference. First operand 2833 states and 12194 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:45:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:45:49,913 INFO L93 Difference]: Finished difference Result 17037 states and 70068 transitions. [2022-11-22 01:45:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:45:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 01:45:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:45:50,061 INFO L225 Difference]: With dead ends: 17037 [2022-11-22 01:45:50,061 INFO L226 Difference]: Without dead ends: 17037 [2022-11-22 01:45:50,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:45:50,063 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2904 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2904 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:45:50,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2904 Valid, 393 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-11-22 01:45:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17037 states. [2022-11-22 01:45:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17037 to 2845. [2022-11-22 01:45:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2836 states have (on average 4.30818053596615) internal successors, (12218), 2844 states have internal predecessors, (12218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:45:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 12218 transitions. [2022-11-22 01:45:50,471 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 12218 transitions. Word has length 12 [2022-11-22 01:45:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:45:50,473 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 12218 transitions. [2022-11-22 01:45:50,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:45:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 12218 transitions. [2022-11-22 01:45:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:45:50,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:45:50,476 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:45:50,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-22 01:45:50,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-22 01:45:50,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:45:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:45:51,082 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:45:51,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:45:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash -360333027, now seen corresponding path program 2 times [2022-11-22 01:45:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:45:51,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221158654] [2022-11-22 01:45:51,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:45:51,083 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 [2022-11-22 01:45:51,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:45:51,085 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:45:51,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:45:51,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:45:51,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:45:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:45:51,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:51,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:45:51,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:45:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:51,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:45:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:53,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:45:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221158654] [2022-11-22 01:45:53,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221158654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:45:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1461989514] [2022-11-22 01:45:53,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:45:53,899 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:45:53,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:45:53,900 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:45:53,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-22 01:45:54,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:45:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:45:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:45:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:45:55,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:45:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:45:56,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1461989514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:45:56,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569330940] [2022-11-22 01:45:56,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:45:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:45:56,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:45:56,587 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:45:56,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-22 01:45:56,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:45:56,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:45:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:45:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:56,990 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:45:56,991 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 [2022-11-22 01:45:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:58,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:46:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:00,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569330940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:46:00,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:46:00,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 8, 9, 9] total 49 [2022-11-22 01:46:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865266877] [2022-11-22 01:46:00,148 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:46:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 01:46:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:46:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 01:46:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 01:46:00,151 INFO L87 Difference]: Start difference. First operand 2845 states and 12218 transitions. Second operand has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:46:30,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:46:30,007 INFO L93 Difference]: Finished difference Result 3445 states and 13102 transitions. [2022-11-22 01:46:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 01:46:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:46:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:46:30,022 INFO L225 Difference]: With dead ends: 3445 [2022-11-22 01:46:30,022 INFO L226 Difference]: Without dead ends: 3445 [2022-11-22 01:46:30,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=995, Invalid=5167, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 01:46:30,024 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1823 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 4468 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1823 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 4523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:46:30,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1823 Valid, 378 Invalid, 4523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 4468 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2022-11-22 01:46:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2022-11-22 01:46:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 2575. [2022-11-22 01:46:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2566 states have (on average 4.257989088074825) internal successors, (10926), 2574 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:46:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10926 transitions. [2022-11-22 01:46:30,105 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10926 transitions. Word has length 13 [2022-11-22 01:46:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:46:30,105 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 10926 transitions. [2022-11-22 01:46:30,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:46:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10926 transitions. [2022-11-22 01:46:30,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:46:30,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:46:30,108 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:46:30,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-22 01:46:30,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-22 01:46:30,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:46:30,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:46:30,717 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:46:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:46:30,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1173971750, now seen corresponding path program 2 times [2022-11-22 01:46:30,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:46:30,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602658716] [2022-11-22 01:46:30,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:46:30,718 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 [2022-11-22 01:46:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:46:30,719 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:46:30,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:46:30,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 01:46:30,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:46:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:46:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:46:31,022 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:46:31,022 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 [2022-11-22 01:46:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:46:31,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:46:31,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:46:31,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602658716] [2022-11-22 01:46:31,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602658716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:46:31,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:46:31,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:46:31,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9078978] [2022-11-22 01:46:31,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:46:31,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:46:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:46:31,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:46:31,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:46:31,305 INFO L87 Difference]: Start difference. First operand 2575 states and 10926 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:46:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:46:31,758 INFO L93 Difference]: Finished difference Result 2297 states and 9541 transitions. [2022-11-22 01:46:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:46:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:46:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:46:31,766 INFO L225 Difference]: With dead ends: 2297 [2022-11-22 01:46:31,766 INFO L226 Difference]: Without dead ends: 2297 [2022-11-22 01:46:31,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:46:31,767 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:46:31,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:46:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-11-22 01:46:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1465. [2022-11-22 01:46:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1460 states have (on average 3.8965753424657534) internal successors, (5689), 1464 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:46:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 5689 transitions. [2022-11-22 01:46:31,815 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 5689 transitions. Word has length 13 [2022-11-22 01:46:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:46:31,816 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 5689 transitions. [2022-11-22 01:46:31,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:46:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 5689 transitions. [2022-11-22 01:46:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:46:31,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:46:31,819 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2022-11-22 01:46:31,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-22 01:46:32,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:46:32,031 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:46:32,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:46:32,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2039496506, now seen corresponding path program 3 times [2022-11-22 01:46:32,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:46:32,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384156278] [2022-11-22 01:46:32,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:46:32,032 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 [2022-11-22 01:46:32,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:46:32,033 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:46:32,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-22 01:46:32,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:46:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:46:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:46:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:46:32,568 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:46:32,568 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 [2022-11-22 01:46:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:33,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:46:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:36,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:46:36,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384156278] [2022-11-22 01:46:36,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384156278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:46:36,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1179517693] [2022-11-22 01:46:36,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:46:36,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:46:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:46:36,046 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:46:36,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-22 01:46:37,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:46:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:46:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:46:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:46:37,765 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:46:37,766 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 [2022-11-22 01:46:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:38,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:46:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:41,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1179517693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:46:41,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934125004] [2022-11-22 01:46:41,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:46:41,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:46:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:46:41,170 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:46:41,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-22 01:46:41,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:46:41,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:46:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:46:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:46:41,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:46:41,946 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 [2022-11-22 01:46:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:42,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:46:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:48,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934125004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:46:48,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:46:48,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 55 [2022-11-22 01:46:48,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881984416] [2022-11-22 01:46:48,117 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:46:48,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-22 01:46:48,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:46:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-22 01:46:48,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2691, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 01:46:48,119 INFO L87 Difference]: Start difference. First operand 1465 states and 5689 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 55 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) [2022-11-22 01:47:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:30,134 INFO L93 Difference]: Finished difference Result 5083 states and 18338 transitions. [2022-11-22 01:47:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 01:47:30,136 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 55 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 14 [2022-11-22 01:47:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:30,148 INFO L225 Difference]: With dead ends: 5083 [2022-11-22 01:47:30,148 INFO L226 Difference]: Without dead ends: 5083 [2022-11-22 01:47:30,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=1573, Invalid=6983, Unknown=0, NotChecked=0, Total=8556 [2022-11-22 01:47:30,151 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3440 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 5898 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3440 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 5996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 5898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:30,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3440 Valid, 854 Invalid, 5996 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [98 Valid, 5898 Invalid, 0 Unknown, 0 Unchecked, 23.0s Time] [2022-11-22 01:47:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2022-11-22 01:47:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 2233. [2022-11-22 01:47:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2228 states have (on average 4.172800718132854) internal successors, (9297), 2232 states have internal predecessors, (9297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:47:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 9297 transitions. [2022-11-22 01:47:30,250 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 9297 transitions. Word has length 14 [2022-11-22 01:47:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:30,250 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 9297 transitions. [2022-11-22 01:47:30,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 55 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) [2022-11-22 01:47:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 9297 transitions. [2022-11-22 01:47:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:47:30,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:30,254 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:30,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:30,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-22 01:47:30,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-22 01:47:30,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:47:30,870 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:47:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 811280221, now seen corresponding path program 3 times [2022-11-22 01:47:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:47:30,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226752107] [2022-11-22 01:47:30,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:47:30,872 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 [2022-11-22 01:47:30,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:47:30,873 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:47:30,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-22 01:47:31,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:47:31,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:31,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:47:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:31,336 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:47:31,336 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 [2022-11-22 01:47:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:47:31,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:47:33,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:47:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226752107] [2022-11-22 01:47:33,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226752107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:33,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098847306] [2022-11-22 01:47:33,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:47:33,348 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:47:33,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:47:33,349 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:47:33,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-22 01:47:33,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:47:33,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 01:47:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:34,033 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:47:34,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:47:35,215 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 13 treesize of output 9 [2022-11-22 01:47:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:35,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:38,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098847306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:38,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032444152] [2022-11-22 01:47:38,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:47:38,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:38,694 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:38,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-22 01:47:38,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:47:38,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:47:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:40,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:43,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032444152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:43,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:47:43,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 12, 11] total 58 [2022-11-22 01:47:43,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166440817] [2022-11-22 01:47:43,162 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:43,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-22 01:47:43,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:47:43,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-22 01:47:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=3120, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 01:47:43,164 INFO L87 Difference]: Start difference. First operand 2233 states and 9297 transitions. Second operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:00,446 INFO L93 Difference]: Finished difference Result 6051 states and 21406 transitions. [2022-11-22 01:49:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-22 01:49:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:49:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:00,461 INFO L225 Difference]: With dead ends: 6051 [2022-11-22 01:49:00,461 INFO L226 Difference]: Without dead ends: 6051 [2022-11-22 01:49:00,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4413 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=2634, Invalid=12128, Unknown=0, NotChecked=0, Total=14762 [2022-11-22 01:49:00,464 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5643 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 9828 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5643 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 10035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 9828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:00,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5643 Valid, 774 Invalid, 10035 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [207 Valid, 9828 Invalid, 0 Unknown, 0 Unchecked, 31.1s Time] [2022-11-22 01:49:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2022-11-22 01:49:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 2969. [2022-11-22 01:49:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2964 states have (on average 4.375168690958165) internal successors, (12968), 2968 states have internal predecessors, (12968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 12968 transitions. [2022-11-22 01:49:00,611 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 12968 transitions. Word has length 15 [2022-11-22 01:49:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:00,612 INFO L495 AbstractCegarLoop]: Abstraction has 2969 states and 12968 transitions. [2022-11-22 01:49:00,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 12968 transitions. [2022-11-22 01:49:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:49:00,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:00,615 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-11-22 01:49:00,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-22 01:49:00,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-22 01:49:01,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-22 01:49:01,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:49:01,225 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:49:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:01,225 INFO L85 PathProgramCache]: Analyzing trace with hash 35027924, now seen corresponding path program 4 times [2022-11-22 01:49:01,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:49:01,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936083350] [2022-11-22 01:49:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:49:01,226 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 [2022-11-22 01:49:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:49:01,227 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:49:01,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-22 01:49:01,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:49:01,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:49:01,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:49:01,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:01,603 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:49:01,603 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 [2022-11-22 01:49:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:49:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:49:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:49:03,948 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:49:03,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936083350] [2022-11-22 01:49:03,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936083350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:49:03,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1889169603] [2022-11-22 01:49:03,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:49:03,949 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:49:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:49:03,952 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:49:03,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-22 01:49:04,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:49:04,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:49:04,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:49:04,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:05,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:49:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:07,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1889169603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:49:07,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984324294] [2022-11-22 01:49:07,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:49:07,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:07,639 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:07,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-22 01:49:07,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:49:07,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:49:07,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:49:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:08,015 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:49:08,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:49:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:49:08,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:49:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:49:11,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984324294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:49:11,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:49:11,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 13, 13, 8, 8] total 48 [2022-11-22 01:49:11,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890108652] [2022-11-22 01:49:11,013 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:49:11,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 01:49:11,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:49:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 01:49:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 01:49:11,015 INFO L87 Difference]: Start difference. First operand 2969 states and 12968 transitions. Second operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:03,664 INFO L93 Difference]: Finished difference Result 7605 states and 29632 transitions. [2022-11-22 01:50:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-22 01:50:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:50:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:03,686 INFO L225 Difference]: With dead ends: 7605 [2022-11-22 01:50:03,686 INFO L226 Difference]: Without dead ends: 7605 [2022-11-22 01:50:03,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3729 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=2503, Invalid=11069, Unknown=0, NotChecked=0, Total=13572 [2022-11-22 01:50:03,689 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 5214 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 7983 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5214 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 8172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 7983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:03,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5214 Valid, 1366 Invalid, 8172 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [189 Valid, 7983 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2022-11-22 01:50:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2022-11-22 01:50:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 3660. [2022-11-22 01:50:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3660 states, 3655 states have (on average 4.294664842681258) internal successors, (15697), 3659 states have internal predecessors, (15697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3660 states to 3660 states and 15697 transitions. [2022-11-22 01:50:03,822 INFO L78 Accepts]: Start accepts. Automaton has 3660 states and 15697 transitions. Word has length 15 [2022-11-22 01:50:03,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:03,822 INFO L495 AbstractCegarLoop]: Abstraction has 3660 states and 15697 transitions. [2022-11-22 01:50:03,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3660 states and 15697 transitions. [2022-11-22 01:50:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:50:03,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:03,828 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] [2022-11-22 01:50:03,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:04,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-22 01:50:04,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-22 01:50:04,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:04,434 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash -330669277, now seen corresponding path program 1 times [2022-11-22 01:50:04,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:04,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72017934] [2022-11-22 01:50:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:04,435 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 [2022-11-22 01:50:04,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:04,436 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:04,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-22 01:50:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:50:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:04,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:50:04,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:04,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72017934] [2022-11-22 01:50:04,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72017934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:04,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:04,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:50:04,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580637428] [2022-11-22 01:50:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:04,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:50:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:50:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:50:04,710 INFO L87 Difference]: Start difference. First operand 3660 states and 15697 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:04,933 INFO L93 Difference]: Finished difference Result 3907 states and 16448 transitions. [2022-11-22 01:50:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:50:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-22 01:50:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:04,953 INFO L225 Difference]: With dead ends: 3907 [2022-11-22 01:50:04,953 INFO L226 Difference]: Without dead ends: 3803 [2022-11-22 01:50:04,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:50:04,954 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:04,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3803 states. [2022-11-22 01:50:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3803 to 3635. [2022-11-22 01:50:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3630 states have (on average 4.307438016528925) internal successors, (15636), 3634 states have internal predecessors, (15636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 15636 transitions. [2022-11-22 01:50:05,082 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 15636 transitions. Word has length 20 [2022-11-22 01:50:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:05,083 INFO L495 AbstractCegarLoop]: Abstraction has 3635 states and 15636 transitions. [2022-11-22 01:50:05,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 15636 transitions. [2022-11-22 01:50:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:50:05,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:05,093 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] [2022-11-22 01:50:05,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:05,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:50:05,306 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:05,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash -730104899, now seen corresponding path program 1 times [2022-11-22 01:50:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:05,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861360892] [2022-11-22 01:50:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:05,307 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 [2022-11-22 01:50:05,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:05,309 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:05,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-22 01:50:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:50:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:05,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:06,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:06,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861360892] [2022-11-22 01:50:06,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861360892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:06,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396487088] [2022-11-22 01:50:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:06,209 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:06,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:06,210 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:06,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-22 01:50:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:50:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:06,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:07,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [396487088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:07,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370600879] [2022-11-22 01:50:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:07,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:07,008 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:07,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-22 01:50:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:50:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:07,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:07,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370600879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:07,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:50:07,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7, 7, 9, 8] total 27 [2022-11-22 01:50:07,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961437613] [2022-11-22 01:50:07,585 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:50:07,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 01:50:07,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:07,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 01:50:07,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:50:07,586 INFO L87 Difference]: Start difference. First operand 3635 states and 15636 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:15,144 INFO L93 Difference]: Finished difference Result 6259 states and 26210 transitions. [2022-11-22 01:50:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-22 01:50:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-22 01:50:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:15,167 INFO L225 Difference]: With dead ends: 6259 [2022-11-22 01:50:15,167 INFO L226 Difference]: Without dead ends: 6259 [2022-11-22 01:50:15,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1331, Invalid=4071, Unknown=0, NotChecked=0, Total=5402 [2022-11-22 01:50:15,169 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 542 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:15,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 114 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-22 01:50:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2022-11-22 01:50:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 3847. [2022-11-22 01:50:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3847 states, 3842 states have (on average 4.24102030192608) internal successors, (16294), 3846 states have internal predecessors, (16294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3847 states to 3847 states and 16294 transitions. [2022-11-22 01:50:15,299 INFO L78 Accepts]: Start accepts. Automaton has 3847 states and 16294 transitions. Word has length 22 [2022-11-22 01:50:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:15,299 INFO L495 AbstractCegarLoop]: Abstraction has 3847 states and 16294 transitions. [2022-11-22 01:50:15,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3847 states and 16294 transitions. [2022-11-22 01:50:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:50:15,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:15,305 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] [2022-11-22 01:50:15,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:15,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:15,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-22 01:50:15,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:15,910 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1125078261, now seen corresponding path program 2 times [2022-11-22 01:50:15,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:15,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639032951] [2022-11-22 01:50:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:50:15,911 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 [2022-11-22 01:50:15,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:15,912 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:15,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-22 01:50:16,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:50:16,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:16,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:16,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:16,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639032951] [2022-11-22 01:50:16,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639032951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:16,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [628357732] [2022-11-22 01:50:16,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:50:16,872 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:16,874 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:16,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-22 01:50:17,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:17,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:17,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:50:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:17,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:17,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [628357732] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:17,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:50:17,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8, 6] total 23 [2022-11-22 01:50:17,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388603563] [2022-11-22 01:50:17,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:17,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:50:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:50:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:50:17,778 INFO L87 Difference]: Start difference. First operand 3847 states and 16294 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:18,613 INFO L93 Difference]: Finished difference Result 5967 states and 25353 transitions. [2022-11-22 01:50:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:50:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-22 01:50:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:18,635 INFO L225 Difference]: With dead ends: 5967 [2022-11-22 01:50:18,636 INFO L226 Difference]: Without dead ends: 5967 [2022-11-22 01:50:18,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:50:18,637 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 102 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:18,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 14 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:50:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5967 states. [2022-11-22 01:50:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5967 to 4017. [2022-11-22 01:50:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 4012 states have (on average 4.251744765702892) internal successors, (17058), 4016 states have internal predecessors, (17058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 17058 transitions. [2022-11-22 01:50:18,778 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 17058 transitions. Word has length 22 [2022-11-22 01:50:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:18,778 INFO L495 AbstractCegarLoop]: Abstraction has 4017 states and 17058 transitions. [2022-11-22 01:50:18,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 17058 transitions. [2022-11-22 01:50:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:50:18,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:18,785 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] [2022-11-22 01:50:18,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:19,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:19,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:50:19,190 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1452139975, now seen corresponding path program 3 times [2022-11-22 01:50:19,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:19,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042147766] [2022-11-22 01:50:19,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:50:19,191 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 [2022-11-22 01:50:19,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:19,193 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:19,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-22 01:50:19,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:50:19,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:50:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:19,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:20,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:20,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042147766] [2022-11-22 01:50:20,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042147766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:20,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37263362] [2022-11-22 01:50:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:50:20,195 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:20,196 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:20,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-22 01:50:20,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:50:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:20,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:50:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:21,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:21,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37263362] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:21,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:50:21,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8, 6] total 23 [2022-11-22 01:50:21,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314087971] [2022-11-22 01:50:21,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:21,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:50:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:50:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:50:21,151 INFO L87 Difference]: Start difference. First operand 4017 states and 17058 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:21,981 INFO L93 Difference]: Finished difference Result 5655 states and 24407 transitions. [2022-11-22 01:50:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:50:21,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-22 01:50:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:21,998 INFO L225 Difference]: With dead ends: 5655 [2022-11-22 01:50:21,998 INFO L226 Difference]: Without dead ends: 5655 [2022-11-22 01:50:21,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:50:21,999 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 109 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:21,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 13 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:50:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2022-11-22 01:50:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 4017. [2022-11-22 01:50:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 4012 states have (on average 4.251744765702892) internal successors, (17058), 4016 states have internal predecessors, (17058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 17058 transitions. [2022-11-22 01:50:22,097 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 17058 transitions. Word has length 22 [2022-11-22 01:50:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:22,097 INFO L495 AbstractCegarLoop]: Abstraction has 4017 states and 17058 transitions. [2022-11-22 01:50:22,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 17058 transitions. [2022-11-22 01:50:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:50:22,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:22,105 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] [2022-11-22 01:50:22,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:22,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-11-22 01:50:22,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:22,519 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash -805403679, now seen corresponding path program 4 times [2022-11-22 01:50:22,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:22,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351593829] [2022-11-22 01:50:22,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:50:22,521 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 [2022-11-22 01:50:22,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:22,521 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:22,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-22 01:50:22,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:50:22,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:50:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:23,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:23,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:23,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351593829] [2022-11-22 01:50:23,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351593829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:23,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [822407531] [2022-11-22 01:50:23,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:50:23,427 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:23,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:23,429 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:23,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-22 01:50:23,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:50:23,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:50:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:24,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:24,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [822407531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:24,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358508318] [2022-11-22 01:50:24,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:50:24,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:24,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:24,389 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:24,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-22 01:50:24,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:50:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:50:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:24,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:25,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358508318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:25,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:50:25,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 8] total 29 [2022-11-22 01:50:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012006210] [2022-11-22 01:50:25,210 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:50:25,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:50:25,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:50:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:50:25,212 INFO L87 Difference]: Start difference. First operand 4017 states and 17058 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:32,286 INFO L93 Difference]: Finished difference Result 5081 states and 20162 transitions. [2022-11-22 01:50:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 01:50:32,288 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 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 22 [2022-11-22 01:50:32,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:32,302 INFO L225 Difference]: With dead ends: 5081 [2022-11-22 01:50:32,302 INFO L226 Difference]: Without dead ends: 5081 [2022-11-22 01:50:32,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=955, Invalid=2585, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 01:50:32,303 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 536 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:32,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 84 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-22 01:50:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2022-11-22 01:50:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4195. [2022-11-22 01:50:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4190 states have (on average 4.195704057279237) internal successors, (17580), 4194 states have internal predecessors, (17580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 17580 transitions. [2022-11-22 01:50:32,392 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 17580 transitions. Word has length 22 [2022-11-22 01:50:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:32,393 INFO L495 AbstractCegarLoop]: Abstraction has 4195 states and 17580 transitions. [2022-11-22 01:50:32,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 17580 transitions. [2022-11-22 01:50:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:50:32,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:32,400 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] [2022-11-22 01:50:32,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:32,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-22 01:50:32,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-22 01:50:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:33,014 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -289250951, now seen corresponding path program 5 times [2022-11-22 01:50:33,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:33,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321734932] [2022-11-22 01:50:33,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:50:33,015 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 [2022-11-22 01:50:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:33,016 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:33,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-22 01:50:33,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:50:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:33,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:33,972 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321734932] [2022-11-22 01:50:33,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321734932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:33,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207190631] [2022-11-22 01:50:33,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:50:33,973 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:33,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:33,974 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:33,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-22 01:50:34,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:34,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:50:34,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:34,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:34,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1207190631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472350708] [2022-11-22 01:50:34,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:50:34,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:34,970 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:34,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-22 01:50:35,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:35,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:50:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:35,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:35,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472350708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:35,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:50:35,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7, 7, 9, 8] total 29 [2022-11-22 01:50:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341478036] [2022-11-22 01:50:35,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:50:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:50:35,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:50:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:50:35,652 INFO L87 Difference]: Start difference. First operand 4195 states and 17580 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:42,063 INFO L93 Difference]: Finished difference Result 5677 states and 22085 transitions. [2022-11-22 01:50:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 01:50:42,066 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-22 01:50:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:42,081 INFO L225 Difference]: With dead ends: 5677 [2022-11-22 01:50:42,081 INFO L226 Difference]: Without dead ends: 5677 [2022-11-22 01:50:42,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1036, Invalid=2870, Unknown=0, NotChecked=0, Total=3906 [2022-11-22 01:50:42,082 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 574 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:42,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 50 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-22 01:50:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2022-11-22 01:50:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 4295. [2022-11-22 01:50:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4290 states have (on average 4.229603729603729) internal successors, (18145), 4294 states have internal predecessors, (18145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 18145 transitions. [2022-11-22 01:50:42,227 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 18145 transitions. Word has length 22 [2022-11-22 01:50:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:42,228 INFO L495 AbstractCegarLoop]: Abstraction has 4295 states and 18145 transitions. [2022-11-22 01:50:42,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 18145 transitions. [2022-11-22 01:50:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:50:42,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:42,235 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] [2022-11-22 01:50:42,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:42,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-22 01:50:42,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:42,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:42,840 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1428498109, now seen corresponding path program 6 times [2022-11-22 01:50:42,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:42,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200258899] [2022-11-22 01:50:42,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-22 01:50:42,841 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 [2022-11-22 01:50:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:42,843 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:42,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-22 01:50:43,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-22 01:50:43,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:50:43,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:43,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:43,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200258899] [2022-11-22 01:50:43,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200258899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495309882] [2022-11-22 01:50:43,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-22 01:50:43,859 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:43,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:43,860 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:43,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-22 01:50:44,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-22 01:50:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:50:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:44,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495309882] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:44,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:50:44,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2022-11-22 01:50:44,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610865436] [2022-11-22 01:50:44,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:44,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:50:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:50:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:50:44,818 INFO L87 Difference]: Start difference. First operand 4295 states and 18145 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:45,857 INFO L93 Difference]: Finished difference Result 4655 states and 19207 transitions. [2022-11-22 01:50:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:50:45,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-22 01:50:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:45,871 INFO L225 Difference]: With dead ends: 4655 [2022-11-22 01:50:45,871 INFO L226 Difference]: Without dead ends: 4655 [2022-11-22 01:50:45,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:50:45,872 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:45,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 15 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:50:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4655 states. [2022-11-22 01:50:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4655 to 4195. [2022-11-22 01:50:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4190 states have (on average 4.195704057279237) internal successors, (17580), 4194 states have internal predecessors, (17580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 17580 transitions. [2022-11-22 01:50:46,043 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 17580 transitions. Word has length 22 [2022-11-22 01:50:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:46,043 INFO L495 AbstractCegarLoop]: Abstraction has 4195 states and 17580 transitions. [2022-11-22 01:50:46,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 17580 transitions. [2022-11-22 01:50:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:50:46,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:46,051 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:46,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:46,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:46,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:46,465 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:50:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash 671417103, now seen corresponding path program 4 times [2022-11-22 01:50:46,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:46,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495955943] [2022-11-22 01:50:46,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:50:46,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:50:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:46,467 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:50:46,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-22 01:50:46,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:50:46,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 01:50:46,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:46,963 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:50:46,963 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 [2022-11-22 01:50:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:50:48,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:54,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495955943] [2022-11-22 01:50:54,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495955943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1836721155] [2022-11-22 01:50:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:50:54,130 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:54,134 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:54,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-22 01:50:54,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:50:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:54,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:50:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:55,008 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:50:55,008 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 [2022-11-22 01:50:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:50:58,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:03,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1836721155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:51:03,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942022597] [2022-11-22 01:51:03,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:51:03,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:51:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:51:03,225 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:51:03,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-22 01:51:03,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:51:03,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:51:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:51:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:03,723 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:51:03,723 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 [2022-11-22 01:51:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:51:06,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:51:10,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942022597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:51:10,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:51:10,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16, 16, 14, 14] total 83 [2022-11-22 01:51:10,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246979008] [2022-11-22 01:51:10,531 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:51:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-22 01:51:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-22 01:51:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=6151, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 01:51:10,532 INFO L87 Difference]: Start difference. First operand 4195 states and 17580 transitions. Second operand has 84 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:37,909 INFO L93 Difference]: Finished difference Result 7904 states and 29694 transitions. [2022-11-22 01:52:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 01:52:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 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 22 [2022-11-22 01:52:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:37,934 INFO L225 Difference]: With dead ends: 7904 [2022-11-22 01:52:37,934 INFO L226 Difference]: Without dead ends: 7904 [2022-11-22 01:52:37,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=2290, Invalid=12230, Unknown=0, NotChecked=0, Total=14520 [2022-11-22 01:52:37,936 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4393 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 11372 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4393 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 11494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 11372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:37,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4393 Valid, 1562 Invalid, 11494 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [122 Valid, 11372 Invalid, 0 Unknown, 0 Unchecked, 55.0s Time] [2022-11-22 01:52:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2022-11-22 01:52:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 5144. [2022-11-22 01:52:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5139 states have (on average 4.3039501848608674) internal successors, (22118), 5143 states have internal predecessors, (22118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 22118 transitions. [2022-11-22 01:52:38,090 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 22118 transitions. Word has length 22 [2022-11-22 01:52:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:38,090 INFO L495 AbstractCegarLoop]: Abstraction has 5144 states and 22118 transitions. [2022-11-22 01:52:38,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 22118 transitions. [2022-11-22 01:52:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:52:38,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:38,099 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] [2022-11-22 01:52:38,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-22 01:52:38,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2022-11-22 01:52:38,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-22 01:52:38,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:38,707 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:52:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:38,708 INFO L85 PathProgramCache]: Analyzing trace with hash 157268771, now seen corresponding path program 1 times [2022-11-22 01:52:38,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:52:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814701410] [2022-11-22 01:52:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:38,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:38,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:52:38,710 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:52:38,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-22 01:52:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-22 01:52:39,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:39,080 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 [2022-11-22 01:52:39,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:39,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:52:39,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:52:40,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-22 01:52:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:40,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:42,705 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2535 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2534 (Array (_ BitVec 32) (_ BitVec 8)))) (= (bvadd (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2535) c_~A~0.base))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) c_~A~0.offset)) (select .cse0 (bvadd (_ bv2 32) c_~A~0.offset))) (select .cse0 (bvadd c_~A~0.offset (_ bv1 32)))) (select .cse0 c_~A~0.offset))) c_~res2~0) c_~res1~0)) is different from false [2022-11-22 01:52:43,016 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-22 01:52:43,017 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 630 treesize of output 346 [2022-11-22 01:52:43,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:43,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 278 [2022-11-22 01:52:43,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:43,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 222 [2022-11-22 01:52:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-22 01:52:54,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:52:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814701410] [2022-11-22 01:52:54,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814701410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826410820] [2022-11-22 01:52:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:54,130 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:52:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:52:54,131 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:52:54,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-22 01:52:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:54,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 01:52:54,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:55,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:55,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:52:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:55,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:52:56,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-22 01:52:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:56,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:56,282 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2571 (Array (_ BitVec 32) (_ BitVec 8)))) (= (bvadd c_~res2~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2571) c_~A~0.base))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) c_~A~0.offset)) (select .cse0 (bvadd (_ bv2 32) c_~A~0.offset))) (select .cse0 (bvadd c_~A~0.offset (_ bv1 32)))) (select .cse0 c_~A~0.offset)))) c_~res1~0)) is different from false [2022-11-22 01:52:56,314 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2571 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2570 (Array (_ BitVec 32) (_ BitVec 8)))) (= c_~res1~0 (bvadd c_~res2~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2570) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2571) c_~A~0.base))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) c_~A~0.offset)) (select .cse0 (bvadd (_ bv2 32) c_~A~0.offset))) (select .cse0 (bvadd c_~A~0.offset (_ bv1 32)))) (select .cse0 c_~A~0.offset)))))) is different from false [2022-11-22 01:52:56,598 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-22 01:52:56,599 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 310 treesize of output 188 [2022-11-22 01:52:56,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:56,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 120 [2022-11-22 01:52:56,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:56,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 52 [2022-11-22 01:53:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-22 01:53:02,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826410820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527122836] [2022-11-22 01:53:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:02,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:02,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:02,406 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:02,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-22 01:53:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:02,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 01:53:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:02,716 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 34 treesize of output 32 [2022-11-22 01:53:03,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:53:03,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:53:03,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:03,656 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-11-22 01:53:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:03,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:03,883 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2611 (Array (_ BitVec 32) (_ BitVec 8)))) (= (bvadd (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2611) c_~A~0.base))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) c_~A~0.offset)) (select .cse0 (bvadd (_ bv2 32) c_~A~0.offset))) (select .cse0 (bvadd c_~A~0.offset (_ bv1 32)))) (select .cse0 c_~A~0.offset))) c_~res2~0) c_~res1~0)) is different from false [2022-11-22 01:53:03,918 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2610 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2611 (Array (_ BitVec 32) (_ BitVec 8)))) (= (bvadd c_~res2~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2610) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2611) c_~A~0.base))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) c_~A~0.offset)) (select .cse0 (bvadd (_ bv2 32) c_~A~0.offset))) (select .cse0 (bvadd c_~A~0.offset (_ bv1 32)))) (select .cse0 c_~A~0.offset)))) c_~res1~0)) is different from false [2022-11-22 01:53:04,217 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-22 01:53:04,217 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 630 treesize of output 346 [2022-11-22 01:53:04,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:04,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 278 [2022-11-22 01:53:04,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:04,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 222 [2022-11-22 01:53:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-22 01:53:10,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527122836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:10,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:53:10,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 32 [2022-11-22 01:53:10,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043431951] [2022-11-22 01:53:10,009 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:10,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:53:10,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:53:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:53:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=660, Unknown=12, NotChecked=290, Total=1122 [2022-11-22 01:53:10,010 INFO L87 Difference]: Start difference. First operand 5144 states and 22118 transitions. Second operand has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:20,162 INFO L93 Difference]: Finished difference Result 5811 states and 24335 transitions. [2022-11-22 01:53:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:53:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 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 23 [2022-11-22 01:53:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:20,184 INFO L225 Difference]: With dead ends: 5811 [2022-11-22 01:53:20,184 INFO L226 Difference]: Without dead ends: 5780 [2022-11-22 01:53:20,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=231, Invalid=897, Unknown=14, NotChecked=340, Total=1482 [2022-11-22 01:53:20,185 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 146 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:20,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 41 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 329 Invalid, 0 Unknown, 328 Unchecked, 2.5s Time] [2022-11-22 01:53:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2022-11-22 01:53:20,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5350. [2022-11-22 01:53:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5350 states, 5345 states have (on average 4.276333021515435) internal successors, (22857), 5349 states have internal predecessors, (22857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5350 states to 5350 states and 22857 transitions. [2022-11-22 01:53:20,325 INFO L78 Accepts]: Start accepts. Automaton has 5350 states and 22857 transitions. Word has length 23 [2022-11-22 01:53:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:20,325 INFO L495 AbstractCegarLoop]: Abstraction has 5350 states and 22857 transitions. [2022-11-22 01:53:20,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 5350 states and 22857 transitions. [2022-11-22 01:53:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:53:20,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:20,334 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] [2022-11-22 01:53:20,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:20,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-22 01:53:20,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:20,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:20,940 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-22 01:53:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash 125357540, now seen corresponding path program 1 times [2022-11-22 01:53:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:53:20,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28311389] [2022-11-22 01:53:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:20,941 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 [2022-11-22 01:53:20,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:53:20,942 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:53:20,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-22 01:53:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 01:53:21,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:21,327 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 [2022-11-22 01:53:21,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:53:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:22,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:53:22,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:53:22,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:22,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:22,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:22,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:22,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:22,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:22,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:22,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:22,874 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 19 [2022-11-22 01:53:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:23,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:27,012 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-11-22 01:53:27,013 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 1190 treesize of output 960 [2022-11-22 01:53:27,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:27,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 928 treesize of output 820 [2022-11-22 01:53:27,229 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-11-22 01:53:27,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 820 treesize of output 670 [2022-11-22 01:53:27,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:27,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 638 treesize of output 422 [2022-11-22 01:53:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:36,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:53:36,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28311389] [2022-11-22 01:53:36,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28311389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:36,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970368880] [2022-11-22 01:53:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:36,639 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:53:36,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:53:36,640 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:53:36,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ee4a7d5-57fc-4378-95fc-ad2a36da23e1/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-22 01:53:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-22 01:53:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:37,573 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:53:37,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:53:37,891 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 [2022-11-22 01:53:38,204 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 [2022-11-22 01:53:39,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:39,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:53:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:39,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-22 01:53:40,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:40,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:40,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:40,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:40,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:40,083 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 19 [2022-11-22 01:53:40,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:53:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:40,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:45,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:45,815 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 412 treesize of output 176 [2022-11-22 01:53:45,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:46,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 2390 treesize of output 1938 [2022-11-22 01:53:46,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:46,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:46,308 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 1898 treesize of output 1606 [2022-11-22 01:53:46,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1566 treesize of output 1134 [2022-11-22 01:53:46,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1134 treesize of output 918