./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0 --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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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-e04fb08 [2022-11-16 16:03:09,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:03:09,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:03:09,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:03:09,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:03:09,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:03:09,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:03:09,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:03:09,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:03:09,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:03:09,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:03:09,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:03:09,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:03:09,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:03:09,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:03:09,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:03:09,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:03:09,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:03:09,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:03:09,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:03:09,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:03:09,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:03:09,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:03:09,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:03:09,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:03:09,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:03:09,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:03:09,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:03:09,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:03:09,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:03:09,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:03:09,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:03:09,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:03:09,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:03:09,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:03:09,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:03:09,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:03:09,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:03:09,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:03:09,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:03:09,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:03:09,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 16:03:09,537 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:03:09,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:03:09,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:03:09,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:03:09,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:03:09,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:03:09,540 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:03:09,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:03:09,541 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:03:09,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:03:09,542 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:03:09,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:03:09,543 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:03:09,543 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:03:09,543 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:03:09,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:03:09,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:03:09,544 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:03:09,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:03:09,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:03:09,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:03:09,546 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:03:09,546 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:03:09,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:03:09,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:03:09,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:03:09,547 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:03:09,547 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:03:09,547 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:03:09,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:03:09,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:03:09,548 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:03:09,549 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:03:09,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:03:09,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:03:09,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:03:09,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:03:09,550 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:03:09,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:03:09,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:03:09,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:03:09,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:03:09,551 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_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-16 16:03:09,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:03:09,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:03:09,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:03:09,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:03:09,966 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:03:09,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-16 16:03:10,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/d326a19e9/118539bd32c94f7f97bc559b6f56df9e/FLAG225d3eec3 [2022-11-16 16:03:10,640 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:03:10,641 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-16 16:03:10,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/d326a19e9/118539bd32c94f7f97bc559b6f56df9e/FLAG225d3eec3 [2022-11-16 16:03:10,959 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/d326a19e9/118539bd32c94f7f97bc559b6f56df9e [2022-11-16 16:03:10,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:03:10,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:03:10,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:03:10,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:03:10,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:03:10,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:03:10" (1/1) ... [2022-11-16 16:03:10,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d3a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:10, skipping insertion in model container [2022-11-16 16:03:10,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:03:10" (1/1) ... [2022-11-16 16:03:10,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:03:11,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:03:11,353 WARN L229 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_255d82c9-2b19-4db8-9fce-6d7f470b5678/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-16 16:03:11,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:03:11,411 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) [2022-11-16 16:03:11,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a1c964c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:11, skipping insertion in model container [2022-11-16 16:03:11,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:03:11,413 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 16:03:11,416 INFO L158 Benchmark]: Toolchain (without parser) took 448.55ms. Allocated memory is still 125.8MB. Free memory was 85.1MB in the beginning and 101.4MB in the end (delta: -16.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 16:03:11,417 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 125.8MB. Free memory was 101.6MB in the beginning and 101.5MB in the end (delta: 69.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:03:11,420 INFO L158 Benchmark]: CACSL2BoogieTranslator took 444.63ms. Allocated memory is still 125.8MB. Free memory was 84.9MB in the beginning and 101.4MB in the end (delta: -16.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 16:03:11,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 125.8MB. Free memory was 101.6MB in the beginning and 101.5MB in the end (delta: 69.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 444.63ms. Allocated memory is still 125.8MB. Free memory was 84.9MB in the beginning and 101.4MB in the end (delta: -16.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0 --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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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-e04fb08 [2022-11-16 16:03:13,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:03:13,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:03:13,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:03:13,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:03:13,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:03:13,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:03:13,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:03:13,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:03:13,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:03:13,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:03:13,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:03:13,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:03:13,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:03:13,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:03:13,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:03:13,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:03:13,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:03:13,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:03:13,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:03:13,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:03:13,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:03:13,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:03:13,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:03:13,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:03:13,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:03:13,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:03:13,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:03:13,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:03:13,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:03:13,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:03:13,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:03:13,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:03:13,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:03:13,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:03:13,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:03:13,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:03:13,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:03:13,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:03:13,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:03:13,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:03:13,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-16 16:03:13,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:03:13,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:03:13,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:03:13,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:03:13,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:03:13,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:03:13,869 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:03:13,869 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:03:13,870 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:03:13,870 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:03:13,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:03:13,871 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:03:13,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:03:13,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:03:13,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:03:13,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:03:13,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:03:13,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:03:13,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:03:13,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:03:13,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:03:13,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:03:13,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:03:13,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:03:13,876 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:03:13,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 16:03:13,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 16:03:13,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:03:13,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:03:13,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:03:13,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 16:03:13,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:03:13,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:03:13,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:03:13,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:03:13,879 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 16:03:13,880 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 16:03:13,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:03:13,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 16:03:13,880 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_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-16 16:03:14,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:03:14,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:03:14,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:03:14,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:03:14,290 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:03:14,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-16 16:03:14,367 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/6aac3ead5/0f63df50294042beb3133db597aa73e3/FLAGc27d01df0 [2022-11-16 16:03:14,931 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:03:14,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-16 16:03:14,940 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/6aac3ead5/0f63df50294042beb3133db597aa73e3/FLAGc27d01df0 [2022-11-16 16:03:15,259 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/data/6aac3ead5/0f63df50294042beb3133db597aa73e3 [2022-11-16 16:03:15,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:03:15,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:03:15,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:03:15,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:03:15,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:03:15,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e130d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15, skipping insertion in model container [2022-11-16 16:03:15,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:03:15,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:03:15,483 WARN L229 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_255d82c9-2b19-4db8-9fce-6d7f470b5678/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-16 16:03:15,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:03:15,563 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 16:03:15,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:03:15,607 WARN L229 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_255d82c9-2b19-4db8-9fce-6d7f470b5678/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-16 16:03:15,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:03:15,619 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:03:15,653 WARN L229 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_255d82c9-2b19-4db8-9fce-6d7f470b5678/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-16 16:03:15,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:03:15,683 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:03:15,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15 WrapperNode [2022-11-16 16:03:15,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:03:15,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:03:15,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:03:15,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:03:15,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,764 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 270 [2022-11-16 16:03:15,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:03:15,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:03:15,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:03:15,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:03:15,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,841 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:03:15,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:03:15,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:03:15,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:03:15,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (1/1) ... [2022-11-16 16:03:15,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:03:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:03:15,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:03:15,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:03:15,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:03:15,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-16 16:03:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 16:03:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:03:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 16:03:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 16:03:15,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 16:03:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 16:03:15,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 16:03:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 16:03:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:03:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:03:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-16 16:03:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:03:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 16:03:15,937 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 16:03:16,065 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:03:16,067 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:03:17,135 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:03:17,150 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:03:17,150 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 16:03:17,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:03:17 BoogieIcfgContainer [2022-11-16 16:03:17,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:03:17,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:03:17,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:03:17,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:03:17,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:03:15" (1/3) ... [2022-11-16 16:03:17,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac2534b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:03:17, skipping insertion in model container [2022-11-16 16:03:17,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:03:15" (2/3) ... [2022-11-16 16:03:17,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac2534b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:03:17, skipping insertion in model container [2022-11-16 16:03:17,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:03:17" (3/3) ... [2022-11-16 16:03:17,163 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-11-16 16:03:17,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:03:17,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-16 16:03:17,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 16:03:17,393 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 16:03:17,443 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:03:17,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 385 places, 406 transitions, 828 flow [2022-11-16 16:03:17,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 385 places, 406 transitions, 828 flow [2022-11-16 16:03:17,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 385 places, 406 transitions, 828 flow [2022-11-16 16:03:17,632 INFO L130 PetriNetUnfolder]: 28/404 cut-off events. [2022-11-16 16:03:17,632 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 16:03:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 404 events. 28/404 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 582 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 307. Up to 2 conditions per place. [2022-11-16 16:03:17,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 11440 [2022-11-16 16:04:26,417 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 172 DAG size of output: 171 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 16:04:30,534 INFO L134 LiptonReduction]: Checked pairs total: 16241 [2022-11-16 16:04:30,535 INFO L136 LiptonReduction]: Total number of compositions: 485 [2022-11-16 16:04:30,544 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 70 transitions, 156 flow [2022-11-16 16:04:30,634 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:30,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:04:30,659 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;@1c74bad2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:04:30,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2022-11-16 16:04:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:04:30,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:04:30,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:04:30,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:04:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:04:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 50287, now seen corresponding path program 1 times [2022-11-16 16:04:30,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:04:30,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507354102] [2022-11-16 16:04:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:04:30,695 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 [2022-11-16 16:04:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:04:30,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:04:30,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:04:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:04:30,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:04:30,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:31,059 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 16:04:31,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 16:04:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:31,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:04:31,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:04:31,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507354102] [2022-11-16 16:04:31,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507354102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:04:31,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:04:31,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:04:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270397406] [2022-11-16 16:04:31,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:04:31,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:04:31,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:04:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:04:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:04:31,159 INFO L87 Difference]: Start difference. First operand has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 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) [2022-11-16 16:04:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:04:31,737 INFO L93 Difference]: Finished difference Result 892 states and 2306 transitions. [2022-11-16 16:04:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:04:31,740 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 [2022-11-16 16:04:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:04:31,773 INFO L225 Difference]: With dead ends: 892 [2022-11-16 16:04:31,773 INFO L226 Difference]: Without dead ends: 892 [2022-11-16 16:04:31,775 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 [2022-11-16 16:04:31,782 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:04:31,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:04:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-11-16 16:04:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 892. [2022-11-16 16:04:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 489 states have (on average 4.715746421267894) internal successors, (2306), 891 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2306 transitions. [2022-11-16 16:04:31,916 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2306 transitions. Word has length 2 [2022-11-16 16:04:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:04:31,918 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 2306 transitions. [2022-11-16 16:04:31,919 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) [2022-11-16 16:04:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2306 transitions. [2022-11-16 16:04:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:04:31,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:04:31,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:04:31,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:04:32,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:04:32,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:04:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:04:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash 50288, now seen corresponding path program 1 times [2022-11-16 16:04:32,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:04:32,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339150428] [2022-11-16 16:04:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:04:32,127 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 [2022-11-16 16:04:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:04:32,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:04:32,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:04:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:04:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:04:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:32,440 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:04:32,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:04:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:32,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:04:32,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:04:32,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339150428] [2022-11-16 16:04:32,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339150428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:04:32,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:04:32,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:04:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870022242] [2022-11-16 16:04:32,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:04:32,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:04:32,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:04:32,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:04:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:04:32,502 INFO L87 Difference]: Start difference. First operand 892 states and 2306 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) [2022-11-16 16:04:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:04:33,163 INFO L93 Difference]: Finished difference Result 893 states and 2307 transitions. [2022-11-16 16:04:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:04:33,164 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 [2022-11-16 16:04:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:04:33,170 INFO L225 Difference]: With dead ends: 893 [2022-11-16 16:04:33,171 INFO L226 Difference]: Without dead ends: 893 [2022-11-16 16:04:33,171 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 [2022-11-16 16:04:33,172 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:04:33,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:04:33,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-16 16:04:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-16 16:04:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 490 states have (on average 4.708163265306123) internal successors, (2307), 892 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2307 transitions. [2022-11-16 16:04:33,206 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2307 transitions. Word has length 2 [2022-11-16 16:04:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:04:33,206 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 2307 transitions. [2022-11-16 16:04:33,206 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) [2022-11-16 16:04:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2307 transitions. [2022-11-16 16:04:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:04:33,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:04:33,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:04:33,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 16:04:33,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:04:33,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:04:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:04:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1566870, now seen corresponding path program 1 times [2022-11-16 16:04:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:04:33,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071437894] [2022-11-16 16:04:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:04:33,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:04:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:04:33,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:04:33,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:04:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:04:33,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:04:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:33,667 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:04:33,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:04:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:33,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:04:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:34,065 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:04:34,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071437894] [2022-11-16 16:04:34,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071437894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:04:34,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038615331] [2022-11-16 16:04:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:04:34,066 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:04:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:04:34,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:04:34,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-16 16:04:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:04:34,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:04:34,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:34,303 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:04:34,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:04:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:34,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:04:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:34,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2038615331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:04:34,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623316182] [2022-11-16 16:04:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:04:34,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:04:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:04:34,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:04:34,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 16:04:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:04:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:04:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:34,669 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:04:34,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:04:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:34,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:04:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:34,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623316182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:04:34,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:04:34,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-16 16:04:34,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601546145] [2022-11-16 16:04:34,934 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:04:34,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 16:04:34,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:04:34,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 16:04:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:04:34,935 INFO L87 Difference]: Start difference. First operand 893 states and 2307 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:36,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:04:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:04:38,513 INFO L93 Difference]: Finished difference Result 903 states and 2325 transitions. [2022-11-16 16:04:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:04:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:04:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:04:38,521 INFO L225 Difference]: With dead ends: 903 [2022-11-16 16:04:38,521 INFO L226 Difference]: Without dead ends: 903 [2022-11-16 16:04:38,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:04:38,523 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:04:38,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 16:04:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-16 16:04:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 900. [2022-11-16 16:04:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 497 states have (on average 4.670020120724346) internal successors, (2321), 899 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2321 transitions. [2022-11-16 16:04:38,577 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2321 transitions. Word has length 3 [2022-11-16 16:04:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:04:38,578 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2321 transitions. [2022-11-16 16:04:38,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2321 transitions. [2022-11-16 16:04:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:04:38,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:04:38,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:04:38,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:04:38,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:04:38,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:04:39,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:04:39,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:04:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:04:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1506117194, now seen corresponding path program 1 times [2022-11-16 16:04:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:04:39,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994095910] [2022-11-16 16:04:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:04:39,195 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 [2022-11-16 16:04:39,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:04:39,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:04:39,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 16:04:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:04:39,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:04:39,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:39,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 16:04:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:04:39,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:04:39,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:04:39,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994095910] [2022-11-16 16:04:39,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994095910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:04:39,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:04:39,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:04:39,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532114341] [2022-11-16 16:04:39,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:04:39,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:04:39,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:04:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:04:39,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:04:39,339 INFO L87 Difference]: Start difference. First operand 900 states and 2321 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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) [2022-11-16 16:04:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:04:39,791 INFO L93 Difference]: Finished difference Result 898 states and 2319 transitions. [2022-11-16 16:04:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:04:39,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 [2022-11-16 16:04:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:04:39,798 INFO L225 Difference]: With dead ends: 898 [2022-11-16 16:04:39,798 INFO L226 Difference]: Without dead ends: 898 [2022-11-16 16:04:39,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:04:39,800 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:04:39,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:04:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-16 16:04:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2022-11-16 16:04:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 497 states have (on average 4.665995975855131) internal successors, (2319), 897 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2319 transitions. [2022-11-16 16:04:39,829 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2319 transitions. Word has length 5 [2022-11-16 16:04:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:04:39,829 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 2319 transitions. [2022-11-16 16:04:39,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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) [2022-11-16 16:04:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2319 transitions. [2022-11-16 16:04:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:04:39,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:04:39,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:04:39,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-16 16:04:40,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:04:40,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:04:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:04:40,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1506117195, now seen corresponding path program 1 times [2022-11-16 16:04:40,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:04:40,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302071480] [2022-11-16 16:04:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:04:40,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:04:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:04:40,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:04:40,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 16:04:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:04:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:04:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:40,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 16:04:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:04:40,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:04:40,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:04:40,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302071480] [2022-11-16 16:04:40,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302071480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:04:40,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:04:40,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:04:40,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971056828] [2022-11-16 16:04:40,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:04:40,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:04:40,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:04:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:04:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:04:40,264 INFO L87 Difference]: Start difference. First operand 898 states and 2319 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) [2022-11-16 16:04:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:04:40,979 INFO L93 Difference]: Finished difference Result 899 states and 2320 transitions. [2022-11-16 16:04:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:04:40,981 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 [2022-11-16 16:04:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:04:40,987 INFO L225 Difference]: With dead ends: 899 [2022-11-16 16:04:40,987 INFO L226 Difference]: Without dead ends: 899 [2022-11-16 16:04:40,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:04:40,988 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:04:40,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 5 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:04:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-16 16:04:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-11-16 16:04:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 498 states have (on average 4.658634538152611) internal successors, (2320), 898 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2320 transitions. [2022-11-16 16:04:41,017 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2320 transitions. Word has length 5 [2022-11-16 16:04:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:04:41,017 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 2320 transitions. [2022-11-16 16:04:41,018 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) [2022-11-16 16:04:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2320 transitions. [2022-11-16 16:04:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:04:41,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:04:41,018 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 16:04:41,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:04:41,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:04:41,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:04:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:04:41,230 INFO L85 PathProgramCache]: Analyzing trace with hash -558129680, now seen corresponding path program 2 times [2022-11-16 16:04:41,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:04:41,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135942027] [2022-11-16 16:04:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:04:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:04:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:04:41,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:04:41,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:04:41,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:04:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:04:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:04:41,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:41,471 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:04:41,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:04:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:41,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:04:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:42,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:04:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135942027] [2022-11-16 16:04:42,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135942027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:04:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1040062666] [2022-11-16 16:04:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:04:42,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:04:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:04:42,568 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:04:42,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-16 16:04:42,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:04:42,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:04:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:04:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:42,876 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:04:42,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:04:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:43,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:04:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:44,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1040062666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:04:44,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161837620] [2022-11-16 16:04:44,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:04:44,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:04:44,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:04:44,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:04:44,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 16:04:44,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:04:44,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:04:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:04:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:04:44,480 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:04:44,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:04:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:44,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:04:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:04:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161837620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:04:44,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:04:44,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-16 16:04:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156755058] [2022-11-16 16:04:44,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:04:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 16:04:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:04:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 16:04:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:04:44,810 INFO L87 Difference]: Start difference. First operand 899 states and 2320 transitions. Second operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:04:49,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:04:51,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:04:52,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:04:54,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:04:57,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:00,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:01,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:03,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:06,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:10,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:05:10,493 INFO L93 Difference]: Finished difference Result 914 states and 2348 transitions. [2022-11-16 16:05:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 16:05:10,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 16:05:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:05:10,499 INFO L225 Difference]: With dead ends: 914 [2022-11-16 16:05:10,500 INFO L226 Difference]: Without dead ends: 914 [2022-11-16 16:05:10,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=276, Invalid=480, Unknown=0, NotChecked=0, Total=756 [2022-11-16 16:05:10,501 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 163 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:05:10,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 603 Invalid, 1 Unknown, 0 Unchecked, 22.9s Time] [2022-11-16 16:05:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-11-16 16:05:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 911. [2022-11-16 16:05:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 510 states have (on average 4.596078431372549) internal successors, (2344), 910 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2344 transitions. [2022-11-16 16:05:10,530 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2344 transitions. Word has length 6 [2022-11-16 16:05:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:05:10,531 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 2344 transitions. [2022-11-16 16:05:10,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2344 transitions. [2022-11-16 16:05:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:05:10,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:05:10,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:05:10,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:05:10,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:05:10,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:11,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:05:11,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:05:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:05:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash -554996775, now seen corresponding path program 1 times [2022-11-16 16:05:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:05:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847377263] [2022-11-16 16:05:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:11,136 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 [2022-11-16 16:05:11,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:05:11,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:05:11,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:05:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:11,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 16:05:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:05:11,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:05:11,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:05:11,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847377263] [2022-11-16 16:05:11,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847377263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:11,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2139333732] [2022-11-16 16:05:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:11,788 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:05:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:05:11,791 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:05:11,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-16 16:05:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:05:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:05:12,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:05:12,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2139333732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:12,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836922033] [2022-11-16 16:05:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:12,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:05:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:05:12,570 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:05:12,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 16:05:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:12,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:05:12,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:12,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 16:05:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:05:12,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:05:13,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836922033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:13,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:05:13,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 3, 3] total 19 [2022-11-16 16:05:13,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372085061] [2022-11-16 16:05:13,129 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:05:13,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 16:05:13,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:05:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 16:05:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:05:13,130 INFO L87 Difference]: Start difference. First operand 911 states and 2344 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:18,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:20,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:05:26,091 INFO L93 Difference]: Finished difference Result 7105 states and 18435 transitions. [2022-11-16 16:05:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 16:05:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2022-11-16 16:05:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:05:26,132 INFO L225 Difference]: With dead ends: 7105 [2022-11-16 16:05:26,132 INFO L226 Difference]: Without dead ends: 7105 [2022-11-16 16:05:26,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:05:26,134 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2922 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2922 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:05:26,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2922 Valid, 38 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-16 16:05:26,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7105 states. [2022-11-16 16:05:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7105 to 931. [2022-11-16 16:05:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 530 states have (on average 4.511320754716981) internal successors, (2391), 930 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2391 transitions. [2022-11-16 16:05:26,251 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2391 transitions. Word has length 6 [2022-11-16 16:05:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:05:26,251 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2391 transitions. [2022-11-16 16:05:26,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2391 transitions. [2022-11-16 16:05:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:05:26,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:05:26,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:05:26,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-16 16:05:26,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 16:05:26,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:26,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:05:26,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:05:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:05:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -25015435, now seen corresponding path program 1 times [2022-11-16 16:05:26,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:05:26,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652643951] [2022-11-16 16:05:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:26,857 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 [2022-11-16 16:05:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:05:26,863 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:05:26,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:26,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:05:26,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:27,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:05:27,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:05:27,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652643951] [2022-11-16 16:05:27,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652643951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:05:27,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:05:27,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:05:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085898124] [2022-11-16 16:05:27,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:05:27,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:05:27,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:05:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:05:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:05:27,019 INFO L87 Difference]: Start difference. First operand 931 states and 2391 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:05:27,567 INFO L93 Difference]: Finished difference Result 931 states and 2389 transitions. [2022-11-16 16:05:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:05:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:05:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:05:27,573 INFO L225 Difference]: With dead ends: 931 [2022-11-16 16:05:27,573 INFO L226 Difference]: Without dead ends: 931 [2022-11-16 16:05:27,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:05:27,574 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:05:27,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:05:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-16 16:05:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 931. [2022-11-16 16:05:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 530 states have (on average 4.507547169811321) internal successors, (2389), 930 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2389 transitions. [2022-11-16 16:05:27,625 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2389 transitions. Word has length 7 [2022-11-16 16:05:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:05:27,626 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2389 transitions. [2022-11-16 16:05:27,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:27,626 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2389 transitions. [2022-11-16 16:05:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:05:27,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:05:27,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:05:27,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:27,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:05:27,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:05:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:05:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash -878098189, now seen corresponding path program 1 times [2022-11-16 16:05:27,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:05:27,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449630401] [2022-11-16 16:05:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:27,838 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 [2022-11-16 16:05:27,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:05:27,840 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:05:27,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:27,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:05:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:28,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:28,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:05:28,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449630401] [2022-11-16 16:05:28,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449630401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:28,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1034471724] [2022-11-16 16:05:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:28,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:05:28,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:05:28,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:05:28,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-16 16:05:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:05:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:28,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:28,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1034471724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804564798] [2022-11-16 16:05:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:28,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:05:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:05:28,867 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:05:28,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 16:05:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:05:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:29,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:29,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804564798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:29,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:05:29,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-16 16:05:29,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322785264] [2022-11-16 16:05:29,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:05:29,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 16:05:29,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:05:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 16:05:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-11-16 16:05:29,264 INFO L87 Difference]: Start difference. First operand 931 states and 2389 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:05:31,173 INFO L93 Difference]: Finished difference Result 1826 states and 4705 transitions. [2022-11-16 16:05:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:05:31,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:05:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:05:31,184 INFO L225 Difference]: With dead ends: 1826 [2022-11-16 16:05:31,184 INFO L226 Difference]: Without dead ends: 1826 [2022-11-16 16:05:31,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:05:31,185 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 448 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:05:31,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 18 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 16:05:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-11-16 16:05:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 931. [2022-11-16 16:05:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 530 states have (on average 4.50188679245283) internal successors, (2386), 930 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2386 transitions. [2022-11-16 16:05:31,220 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2386 transitions. Word has length 8 [2022-11-16 16:05:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:05:31,221 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2386 transitions. [2022-11-16 16:05:31,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2386 transitions. [2022-11-16 16:05:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:05:31,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:05:31,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:05:31,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-11-16 16:05:31,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:31,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 16:05:31,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:05:31,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:05:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:05:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1451239557, now seen corresponding path program 1 times [2022-11-16 16:05:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:05:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556624241] [2022-11-16 16:05:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:31,828 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 [2022-11-16 16:05:31,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:05:31,828 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:05:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:05:32,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:32,120 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-16 16:05:32,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 16:05:32,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:32,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 16:05:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:32,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 16:05:32,323 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 16:05:32,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 16:05:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:05:32,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:05:32,363 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:05:32,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556624241] [2022-11-16 16:05:32,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556624241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:05:32,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:05:32,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:05:32,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849717629] [2022-11-16 16:05:32,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:05:32,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:05:32,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:05:32,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:05:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:05:32,369 INFO L87 Difference]: Start difference. First operand 931 states and 2386 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:05:32,888 INFO L93 Difference]: Finished difference Result 740 states and 1821 transitions. [2022-11-16 16:05:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:05:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 16:05:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:05:32,893 INFO L225 Difference]: With dead ends: 740 [2022-11-16 16:05:32,893 INFO L226 Difference]: Without dead ends: 740 [2022-11-16 16:05:32,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:05:32,894 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:05:32,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2022-11-16 16:05:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-16 16:05:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2022-11-16 16:05:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 457 states have (on average 3.984682713347921) internal successors, (1821), 739 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1821 transitions. [2022-11-16 16:05:32,927 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1821 transitions. Word has length 9 [2022-11-16 16:05:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:05:32,927 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1821 transitions. [2022-11-16 16:05:32,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1821 transitions. [2022-11-16 16:05:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:05:32,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:05:32,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:05:32,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 16:05:33,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:05:33,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:05:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:05:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1451239558, now seen corresponding path program 1 times [2022-11-16 16:05:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:05:33,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215376315] [2022-11-16 16:05:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:33,146 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 [2022-11-16 16:05:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:05:33,147 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:05:33,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:05:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:33,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:33,492 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:05:33,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-16 16:05:33,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:05:33,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:33,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 16:05:33,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 16:05:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:33,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 16:05:33,741 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:05:33,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:05:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:05:33,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 16:05:33,993 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 16:05:33,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 16:05:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:05:34,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:05:34,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:05:34,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215376315] [2022-11-16 16:05:34,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215376315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:05:34,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:05:34,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:05:34,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595900682] [2022-11-16 16:05:34,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:05:34,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:05:34,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:05:34,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:05:34,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:05:34,173 INFO L87 Difference]: Start difference. First operand 740 states and 1821 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:05:34,673 INFO L93 Difference]: Finished difference Result 739 states and 1817 transitions. [2022-11-16 16:05:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:05:34,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 16:05:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:05:34,678 INFO L225 Difference]: With dead ends: 739 [2022-11-16 16:05:34,679 INFO L226 Difference]: Without dead ends: 739 [2022-11-16 16:05:34,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:05:34,680 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:05:34,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 144 Unchecked, 0.5s Time] [2022-11-16 16:05:34,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-11-16 16:05:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 739. [2022-11-16 16:05:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 457 states have (on average 3.975929978118162) internal successors, (1817), 738 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1817 transitions. [2022-11-16 16:05:34,702 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1817 transitions. Word has length 9 [2022-11-16 16:05:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:05:34,702 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 1817 transitions. [2022-11-16 16:05:34,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1817 transitions. [2022-11-16 16:05:34,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:05:34,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:05:34,704 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-16 16:05:34,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:05:34,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:05:34,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:05:34,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:05:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash 554872303, now seen corresponding path program 1 times [2022-11-16 16:05:34,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:05:34,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381565744] [2022-11-16 16:05:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:34,920 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 [2022-11-16 16:05:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:05:34,922 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:05:34,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 16:05:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:05:35,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:35,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 16:05:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:05:35,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:05:36,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:05:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381565744] [2022-11-16 16:05:36,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381565744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [529751601] [2022-11-16 16:05:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:36,594 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:05:36,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:05:36,595 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:05:36,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-16 16:05:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:05:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:37,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:38,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [529751601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991610867] [2022-11-16 16:05:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:05:38,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:05:38,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:05:38,476 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:05:38,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 16:05:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:05:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:05:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:05:39,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 16:05:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:39,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:05:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:05:40,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991610867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:05:40,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:05:40,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 36 [2022-11-16 16:05:40,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621217101] [2022-11-16 16:05:40,210 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:05:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 16:05:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:05:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 16:05:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:05:40,211 INFO L87 Difference]: Start difference. First operand 739 states and 1817 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:05:45,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:47,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:48,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:50,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:56,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:05:59,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:06:01,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:06:03,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:06:05,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:06:07,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:06:09,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:06:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:06:27,969 INFO L93 Difference]: Finished difference Result 3529 states and 8786 transitions. [2022-11-16 16:06:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 16:06:27,970 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:06:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:06:27,984 INFO L225 Difference]: With dead ends: 3529 [2022-11-16 16:06:27,985 INFO L226 Difference]: Without dead ends: 3529 [2022-11-16 16:06:27,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=716, Invalid=3574, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 16:06:27,987 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 986 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 100 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:06:27,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 76 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2019 Invalid, 9 Unknown, 0 Unchecked, 35.9s Time] [2022-11-16 16:06:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2022-11-16 16:06:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 757. [2022-11-16 16:06:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 475 states have (on average 3.8989473684210525) internal successors, (1852), 756 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1852 transitions. [2022-11-16 16:06:28,028 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1852 transitions. Word has length 11 [2022-11-16 16:06:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:06:28,029 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1852 transitions. [2022-11-16 16:06:28,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1852 transitions. [2022-11-16 16:06:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:06:28,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:06:28,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:06:28,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 16:06:28,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-16 16:06:28,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 16:06:28,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:06:28,644 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:06:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:06:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1223192197, now seen corresponding path program 1 times [2022-11-16 16:06:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:06:28,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489387459] [2022-11-16 16:06:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:06:28,645 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 [2022-11-16 16:06:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:06:28,655 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:06:28,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:06:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:06:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:06:28,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:06:28,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 16:06:28,950 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:06:28,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:06:28,985 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 16:06:28,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 16:06:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:06:29,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:06:29,007 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:06:29,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489387459] [2022-11-16 16:06:29,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489387459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:06:29,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:06:29,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:06:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760655899] [2022-11-16 16:06:29,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:06:29,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:06:29,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:06:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:06:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:06:29,010 INFO L87 Difference]: Start difference. First operand 757 states and 1852 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:06:29,472 INFO L93 Difference]: Finished difference Result 634 states and 1535 transitions. [2022-11-16 16:06:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:06:29,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:06:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:06:29,475 INFO L225 Difference]: With dead ends: 634 [2022-11-16 16:06:29,476 INFO L226 Difference]: Without dead ends: 634 [2022-11-16 16:06:29,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:06:29,476 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:06:29,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:06:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-16 16:06:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2022-11-16 16:06:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 416 states have (on average 3.6899038461538463) internal successors, (1535), 633 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1535 transitions. [2022-11-16 16:06:29,494 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1535 transitions. Word has length 11 [2022-11-16 16:06:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:06:29,495 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 1535 transitions. [2022-11-16 16:06:29,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1535 transitions. [2022-11-16 16:06:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:06:29,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:06:29,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:06:29,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:06:29,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:06:29,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:06:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:06:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1223191770, now seen corresponding path program 1 times [2022-11-16 16:06:29,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:06:29,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657744637] [2022-11-16 16:06:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:06:29,712 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 [2022-11-16 16:06:29,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:06:29,713 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:06:29,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 16:06:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:06:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:06:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:06:29,987 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 16:06:29,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 16:06:30,025 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:06:30,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:06:30,059 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:06:30,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:06:30,093 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 16:06:30,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 16:06:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:06:30,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:06:30,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:06:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657744637] [2022-11-16 16:06:30,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657744637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:06:30,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:06:30,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:06:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563549977] [2022-11-16 16:06:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:06:30,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:06:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:06:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:06:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:06:30,121 INFO L87 Difference]: Start difference. First operand 634 states and 1535 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:06:30,611 INFO L93 Difference]: Finished difference Result 523 states and 1250 transitions. [2022-11-16 16:06:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:06:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:06:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:06:30,615 INFO L225 Difference]: With dead ends: 523 [2022-11-16 16:06:30,615 INFO L226 Difference]: Without dead ends: 523 [2022-11-16 16:06:30,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:06:30,616 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:06:30,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:06:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-16 16:06:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2022-11-16 16:06:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 361 states have (on average 3.4626038781163433) internal successors, (1250), 522 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1250 transitions. [2022-11-16 16:06:30,630 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1250 transitions. Word has length 11 [2022-11-16 16:06:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:06:30,630 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 1250 transitions. [2022-11-16 16:06:30,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:06:30,631 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1250 transitions. [2022-11-16 16:06:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:06:30,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:06:30,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:06:30,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-16 16:06:30,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:06:30,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-16 16:06:30,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:06:30,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1223191771, now seen corresponding path program 1 times [2022-11-16 16:06:30,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:06:30,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655024589] [2022-11-16 16:06:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:06:30,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:06:30,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:06:30,848 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:06:30,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 16:06:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:06:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 16:06:31,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:06:31,210 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:06:31,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:06:31,320 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 16:06:31,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 16:06:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:06:31,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:06:31,550 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:06:31,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:06:31,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:06:31,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:06:31,707 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:06:31,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:06:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:06:31,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:06:31,791 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 16:06:31,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 16:06:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:06:31,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:06:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:06:41,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:06:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655024589] [2022-11-16 16:06:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655024589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:06:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575194771] [2022-11-16 16:06:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:06:41,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:06:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:06:41,803 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:06:41,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-16 16:06:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:06:42,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:06:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:06:42,275 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:06:42,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:06:42,370 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 16:06:42,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 16:06:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:06:42,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:06:42,716 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:06:42,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:06:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:06:42,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:06:42,842 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:06:42,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:06:43,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:06:43,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:06:43,060 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 16:06:43,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 16:06:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:06:43,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:07:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:07:03,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575194771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:07:03,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424235139] [2022-11-16 16:07:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:07:03,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:07:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:07:03,255 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:07:03,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255d82c9-2b19-4db8-9fce-6d7f470b5678/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 16:07:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:07:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:07:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:07:03,523 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:07:03,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:07:03,814 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:07:03,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:07:03,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:07:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:07:03,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:07:03,965 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 16:07:03,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 16:07:04,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:07:04,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 16:07:04,055 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 16:07:04,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 16:07:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:07:04,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:07:08,482 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_~id_0~0 (_ bv4 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_~get_2~0.offset .cse0))) (and (or (bvule (bvadd c_~get_2~0.offset .cse0) .cse1) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_114| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_108| (_ BitVec 32)) (v_ArrVal_767 (_ BitVec 1))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_114|) (_ bv0 1))) (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_114| v_ArrVal_767) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_108|)))))) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_114| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_114|) (_ bv0 1))) (forall ((v_ArrVal_768 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_108| (_ BitVec 32)) (v_ArrVal_767 (_ BitVec 1))) (or (forall ((v_ArrVal_682 (_ BitVec 32))) (bvule .cse1 (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_114| v_ArrVal_768) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_108| v_ArrVal_682) c_~get_2~0.base))) (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_114| v_ArrVal_767) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_108|)))))))))) is different from false [2022-11-16 16:07:18,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:07:18,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 249 treesize of output 443