./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-2.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_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- 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 16:11:30,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:11:30,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:11:30,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:11:30,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:11:30,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:11:30,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:11:30,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:11:30,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:11:30,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:11:30,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:11:30,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:11:30,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:11:30,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:11:30,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:11:30,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:11:30,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:11:30,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:11:30,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:11:30,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:11:30,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:11:30,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:11:30,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:11:30,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:11:30,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:11:30,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:11:30,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:11:30,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:11:30,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:11:30,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:11:30,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:11:30,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:11:30,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:11:30,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:11:30,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:11:30,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:11:30,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:11:30,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:11:30,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:11:30,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:11:30,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:11:30,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 16:11:30,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:11:30,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:11:30,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:11:30,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:11:30,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:11:30,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:11:30,526 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:11:30,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:11:30,527 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:11:30,527 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:11:30,528 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:11:30,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:11:30,529 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:11:30,529 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:11:30,529 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:11:30,530 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:11:30,530 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:11:30,530 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:11:30,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:11:30,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:11:30,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:11:30,531 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:11:30,532 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:11:30,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:11:30,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:11:30,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:11:30,533 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:11:30,533 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:11:30,533 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:11:30,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:11:30,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:11:30,534 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:11:30,534 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:11:30,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:11:30,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:11:30,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:11:30,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:11:30,536 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:11:30,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:11:30,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:11:30,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:11:30,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:11:30,537 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_fef774e1-d222-4c30-9450-006dfc0b4fa8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2022-11-16 16:11:30,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:11:30,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:11:30,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:11:30,915 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:11:30,916 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:11:30,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-11-16 16:11:31,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/143149c0a/e71dd627996946389a63ac9e4d22a3f6/FLAGddc5b7dee [2022-11-16 16:11:31,517 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:11:31,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-11-16 16:11:31,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/143149c0a/e71dd627996946389a63ac9e4d22a3f6/FLAGddc5b7dee [2022-11-16 16:11:31,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/143149c0a/e71dd627996946389a63ac9e4d22a3f6 [2022-11-16 16:11:31,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:11:31,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:11:31,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:11:31,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:11:31,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:11:31,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:11:31" (1/1) ... [2022-11-16 16:11:31,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a13d275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:31, skipping insertion in model container [2022-11-16 16:11:31,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:11:31" (1/1) ... [2022-11-16 16:11:31,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:11:31,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:11:32,175 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_fef774e1-d222-4c30-9450-006dfc0b4fa8/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-11-16 16:11:32,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:11:32,194 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 16:11:32,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@723af9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:32, skipping insertion in model container [2022-11-16 16:11:32,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:11:32,195 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 16:11:32,197 INFO L158 Benchmark]: Toolchain (without parser) took 326.08ms. Allocated memory is still 92.3MB. Free memory was 56.1MB in the beginning and 68.5MB in the end (delta: -12.4MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2022-11-16 16:11:32,198 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 72.5MB in the beginning and 72.4MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:11:32,199 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.09ms. Allocated memory is still 92.3MB. Free memory was 55.8MB in the beginning and 68.5MB in the end (delta: -12.6MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2022-11-16 16:11:32,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 72.5MB in the beginning and 72.4MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.09ms. Allocated memory is still 92.3MB. Free memory was 55.8MB in the beginning and 68.5MB in the end (delta: -12.6MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- 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 16:11:34,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:11:34,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:11:34,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:11:34,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:11:34,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:11:34,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:11:34,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:11:34,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:11:34,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:11:34,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:11:34,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:11:34,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:11:34,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:11:34,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:11:34,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:11:34,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:11:34,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:11:34,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:11:34,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:11:34,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:11:34,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:11:34,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:11:34,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:11:34,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:11:34,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:11:34,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:11:34,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:11:34,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:11:34,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:11:34,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:11:34,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:11:34,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:11:34,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:11:34,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:11:34,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:11:34,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:11:34,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:11:34,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:11:34,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:11:34,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:11:34,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-16 16:11:34,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:11:34,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:11:34,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:11:34,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:11:34,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:11:34,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:11:34,437 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:11:34,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:11:34,438 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:11:34,438 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:11:34,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:11:34,439 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:11:34,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:11:34,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:11:34,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:11:34,450 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:11:34,450 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:11:34,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:11:34,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:11:34,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:11:34,451 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:11:34,451 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:11:34,451 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:11:34,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:11:34,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:11:34,452 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 16:11:34,452 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 16:11:34,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:11:34,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:11:34,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:11:34,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 16:11:34,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:11:34,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:11:34,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:11:34,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:11:34,455 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 16:11:34,455 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 16:11:34,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:11:34,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 16:11:34,456 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_fef774e1-d222-4c30-9450-006dfc0b4fa8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2022-11-16 16:11:34,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:11:34,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:11:34,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:11:34,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:11:34,875 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:11:34,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-11-16 16:11:34,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/1fd8807dc/14d96f66771545e3a140cae26d38b7a2/FLAG971e7aa9b [2022-11-16 16:11:35,537 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:11:35,538 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-11-16 16:11:35,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/1fd8807dc/14d96f66771545e3a140cae26d38b7a2/FLAG971e7aa9b [2022-11-16 16:11:35,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/data/1fd8807dc/14d96f66771545e3a140cae26d38b7a2 [2022-11-16 16:11:35,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:11:35,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:11:35,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:11:35,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:11:35,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:11:35,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:11:35" (1/1) ... [2022-11-16 16:11:35,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e20039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:35, skipping insertion in model container [2022-11-16 16:11:35,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:11:35" (1/1) ... [2022-11-16 16:11:35,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:11:35,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:11:36,107 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_fef774e1-d222-4c30-9450-006dfc0b4fa8/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-11-16 16:11:36,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:11:36,148 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 16:11:36,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:11:36,191 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_fef774e1-d222-4c30-9450-006dfc0b4fa8/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-11-16 16:11:36,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:11:36,219 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:11:36,266 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_fef774e1-d222-4c30-9450-006dfc0b4fa8/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-11-16 16:11:36,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:11:36,298 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:11:36,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36 WrapperNode [2022-11-16 16:11:36,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:11:36,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:11:36,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:11:36,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:11:36,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,375 INFO L138 Inliner]: procedures = 26, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 132 [2022-11-16 16:11:36,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:11:36,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:11:36,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:11:36,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:11:36,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,439 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:11:36,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:11:36,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:11:36,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:11:36,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (1/1) ... [2022-11-16 16:11:36,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:11:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:11:36,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:11:36,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:11:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:11:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 16:11:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:11:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 16:11:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 16:11:36,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 16:11:36,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 16:11:36,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 16:11:36,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 16:11:36,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:11:36,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:11:36,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:11:36,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 16:11:36,549 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 16:11:36,694 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:11:36,708 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:11:37,296 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:11:37,313 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:11:37,314 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 16:11:37,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:11:37 BoogieIcfgContainer [2022-11-16 16:11:37,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:11:37,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:11:37,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:11:37,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:11:37,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:11:35" (1/3) ... [2022-11-16 16:11:37,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4cfc4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:11:37, skipping insertion in model container [2022-11-16 16:11:37,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:11:36" (2/3) ... [2022-11-16 16:11:37,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4cfc4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:11:37, skipping insertion in model container [2022-11-16 16:11:37,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:11:37" (3/3) ... [2022-11-16 16:11:37,332 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-11-16 16:11:37,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:11:37,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-16 16:11:37,355 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 16:11:37,519 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 16:11:37,568 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:11:37,597 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 189 transitions, 394 flow [2022-11-16 16:11:37,606 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 189 transitions, 394 flow [2022-11-16 16:11:37,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 189 transitions, 394 flow [2022-11-16 16:11:37,752 INFO L130 PetriNetUnfolder]: 14/187 cut-off events. [2022-11-16 16:11:37,752 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 16:11:37,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 14/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 233 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2022-11-16 16:11:37,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 3004 [2022-11-16 16:12:00,580 INFO L134 LiptonReduction]: Checked pairs total: 3162 [2022-11-16 16:12:00,580 INFO L136 LiptonReduction]: Total number of compositions: 207 [2022-11-16 16:12:00,589 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 37 transitions, 90 flow [2022-11-16 16:12:00,618 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 198 states, 132 states have (on average 3.727272727272727) internal successors, (492), 197 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 16:12:00,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:12:00,642 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;@44eab78b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:12:00,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-11-16 16:12:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 132 states have (on average 3.727272727272727) internal successors, (492), 197 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 16:12:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:12:00,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:00,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:12:00,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 23599, now seen corresponding path program 1 times [2022-11-16 16:12:00,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:00,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713433558] [2022-11-16 16:12:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:00,670 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 16:12:00,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:00,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:00,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:12:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:00,945 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 16:12:00,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:00,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:00,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713433558] [2022-11-16 16:12:00,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713433558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:00,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:00,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:12:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264146624] [2022-11-16 16:12:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:00,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:00,978 INFO L87 Difference]: Start difference. First operand has 198 states, 132 states have (on average 3.727272727272727) internal successors, (492), 197 states have internal predecessors, (492), 0 states have call successors, (0), 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 16:12:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:01,279 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2022-11-16 16:12:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:01,281 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 16:12:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:01,292 INFO L225 Difference]: With dead ends: 176 [2022-11-16 16:12:01,293 INFO L226 Difference]: Without dead ends: 176 [2022-11-16 16:12:01,294 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 16:12:01,297 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:01,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:12:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-16 16:12:01,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2022-11-16 16:12:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 120 states have (on average 3.591666666666667) internal successors, (431), 173 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 16:12:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 431 transitions. [2022-11-16 16:12:01,344 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 431 transitions. Word has length 2 [2022-11-16 16:12:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:01,345 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 431 transitions. [2022-11-16 16:12:01,345 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 16:12:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 431 transitions. [2022-11-16 16:12:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:12:01,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:01,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:12:01,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:01,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:01,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 23479, now seen corresponding path program 1 times [2022-11-16 16:12:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:01,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093259088] [2022-11-16 16:12:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:01,559 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 16:12:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:01,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:01,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:12:01,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:01,696 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 16:12:01,697 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 16:12:01,715 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 16:12:01,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:01,715 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:01,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093259088] [2022-11-16 16:12:01,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093259088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:01,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:01,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:12:01,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18031604] [2022-11-16 16:12:01,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:01,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:01,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:01,719 INFO L87 Difference]: Start difference. First operand 174 states and 431 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 16:12:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:01,973 INFO L93 Difference]: Finished difference Result 173 states and 429 transitions. [2022-11-16 16:12:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:01,973 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 16:12:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:01,976 INFO L225 Difference]: With dead ends: 173 [2022-11-16 16:12:01,976 INFO L226 Difference]: Without dead ends: 173 [2022-11-16 16:12:01,976 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 16:12:01,977 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:01,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:12:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-16 16:12:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-11-16 16:12:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 120 states have (on average 3.575) internal successors, (429), 172 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 16:12:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 429 transitions. [2022-11-16 16:12:01,994 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 429 transitions. Word has length 2 [2022-11-16 16:12:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:01,994 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 429 transitions. [2022-11-16 16:12:01,995 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 16:12:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 429 transitions. [2022-11-16 16:12:01,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:12:01,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:01,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:12:02,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:02,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 23480, now seen corresponding path program 1 times [2022-11-16 16:12:02,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595928473] [2022-11-16 16:12:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:02,209 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 16:12:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:02,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:02,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:12:02,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:02,349 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:02,350 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 16:12:02,386 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 16:12:02,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:02,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595928473] [2022-11-16 16:12:02,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595928473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:02,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:02,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:12:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480528856] [2022-11-16 16:12:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:02,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:02,389 INFO L87 Difference]: Start difference. First operand 173 states and 429 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 16:12:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:02,635 INFO L93 Difference]: Finished difference Result 173 states and 428 transitions. [2022-11-16 16:12:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:02,636 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 16:12:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:02,638 INFO L225 Difference]: With dead ends: 173 [2022-11-16 16:12:02,638 INFO L226 Difference]: Without dead ends: 173 [2022-11-16 16:12:02,639 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 16:12:02,640 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:02,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:12:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-16 16:12:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-11-16 16:12:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 120 states have (on average 3.566666666666667) internal successors, (428), 172 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 16:12:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 428 transitions. [2022-11-16 16:12:02,655 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 428 transitions. Word has length 2 [2022-11-16 16:12:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:02,655 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 428 transitions. [2022-11-16 16:12:02,655 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 16:12:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 428 transitions. [2022-11-16 16:12:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:12:02,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:02,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:12:02,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:02,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:02,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 731205, now seen corresponding path program 1 times [2022-11-16 16:12:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:02,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123281318] [2022-11-16 16:12:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:02,869 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 16:12:02,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:02,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:02,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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)] Waiting until timeout for monitored process [2022-11-16 16:12:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:02,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:12:02,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:02,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:12:03,043 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 16:12:03,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2022-11-16 16:12:03,062 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 16:12:03,214 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 16:12:03,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:03,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:03,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123281318] [2022-11-16 16:12:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123281318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:03,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:03,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:12:03,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257566115] [2022-11-16 16:12:03,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:03,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:03,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:03,226 INFO L87 Difference]: Start difference. First operand 173 states and 428 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:03,352 INFO L93 Difference]: Finished difference Result 172 states and 427 transitions. [2022-11-16 16:12:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:12:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:03,360 INFO L225 Difference]: With dead ends: 172 [2022-11-16 16:12:03,360 INFO L226 Difference]: Without dead ends: 172 [2022-11-16 16:12:03,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:03,361 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:03,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-16 16:12:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-16 16:12:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-16 16:12:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 120 states have (on average 3.558333333333333) internal successors, (427), 171 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 16:12:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 427 transitions. [2022-11-16 16:12:03,384 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 427 transitions. Word has length 3 [2022-11-16 16:12:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:03,385 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 427 transitions. [2022-11-16 16:12:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 427 transitions. [2022-11-16 16:12:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:12:03,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:03,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:12:03,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:03,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:03,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash 731207, now seen corresponding path program 1 times [2022-11-16 16:12:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:03,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109427384] [2022-11-16 16:12:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:03,609 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 16:12:03,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:03,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:03,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (6)] Waiting until timeout for monitored process [2022-11-16 16:12:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:12:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:03,741 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 16:12:03,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-16 16:12:03,806 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 16:12:03,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:03,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:03,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109427384] [2022-11-16 16:12:03,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109427384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:03,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:03,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:12:03,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822912671] [2022-11-16 16:12:03,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:03,809 INFO L87 Difference]: Start difference. First operand 172 states and 427 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:03,924 INFO L93 Difference]: Finished difference Result 171 states and 426 transitions. [2022-11-16 16:12:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:12:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:03,926 INFO L225 Difference]: With dead ends: 171 [2022-11-16 16:12:03,926 INFO L226 Difference]: Without dead ends: 171 [2022-11-16 16:12:03,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:03,927 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:03,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-16 16:12:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-16 16:12:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-16 16:12:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 120 states have (on average 3.55) internal successors, (426), 170 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 16:12:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 426 transitions. [2022-11-16 16:12:03,952 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 426 transitions. Word has length 3 [2022-11-16 16:12:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:03,952 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 426 transitions. [2022-11-16 16:12:03,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 426 transitions. [2022-11-16 16:12:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:12:03,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:03,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:12:03,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:04,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 731086, now seen corresponding path program 1 times [2022-11-16 16:12:04,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:04,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025096986] [2022-11-16 16:12:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:04,167 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 16:12:04,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:04,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:04,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:12:04,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:04,338 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:04,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:12:04,422 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 16:12:04,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:04,698 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 16:12:04,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025096986] [2022-11-16 16:12:04,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025096986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235219311] [2022-11-16 16:12:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:04,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:04,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-16 16:12:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:04,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:12:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:04,914 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:04,914 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 16:12:04,981 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 16:12:04,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:05,063 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 16:12:05,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1235219311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:05,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408244948] [2022-11-16 16:12:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:05,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:05,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 16:12:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:12:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:05,228 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:05,229 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 16:12:05,297 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 16:12:05,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:05,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408244948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:05,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:12:05,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-16 16:12:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389511035] [2022-11-16 16:12:05,457 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 16:12:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:05,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 16:12:05,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:12:05,458 INFO L87 Difference]: Start difference. First operand 171 states and 426 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 16:12:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:06,853 INFO L93 Difference]: Finished difference Result 508 states and 1274 transitions. [2022-11-16 16:12:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:12:06,855 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 16:12:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:06,858 INFO L225 Difference]: With dead ends: 508 [2022-11-16 16:12:06,859 INFO L226 Difference]: Without dead ends: 508 [2022-11-16 16:12:06,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:12:06,860 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 181 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:06,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 10 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 16:12:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-16 16:12:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 174. [2022-11-16 16:12:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 123 states have (on average 3.5121951219512195) internal successors, (432), 173 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 16:12:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 432 transitions. [2022-11-16 16:12:06,873 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 432 transitions. Word has length 3 [2022-11-16 16:12:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:06,873 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 432 transitions. [2022-11-16 16:12:06,873 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 16:12:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 432 transitions. [2022-11-16 16:12:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:12:06,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:06,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:12:06,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:07,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 16:12:07,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:07,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:07,478 INFO L85 PathProgramCache]: Analyzing trace with hash 702705077, now seen corresponding path program 1 times [2022-11-16 16:12:07,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:07,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401103228] [2022-11-16 16:12:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:07,478 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 16:12:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:07,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:07,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (10)] Waiting until timeout for monitored process [2022-11-16 16:12:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:12:07,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:07,692 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:07,692 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 16:12:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:07,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:08,143 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 16:12:08,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401103228] [2022-11-16 16:12:08,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401103228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982150763] [2022-11-16 16:12:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:08,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:08,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:08,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:08,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-16 16:12:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:08,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:12:08,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:08,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:12:08,388 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 16:12:08,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 16:12:08,478 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 16:12:08,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:08,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1982150763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:08,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:12:08,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:12:08,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742834930] [2022-11-16 16:12:08,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:08,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:08,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:12:08,481 INFO L87 Difference]: Start difference. First operand 174 states and 432 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:08,587 INFO L93 Difference]: Finished difference Result 174 states and 436 transitions. [2022-11-16 16:12:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 16:12:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:08,589 INFO L225 Difference]: With dead ends: 174 [2022-11-16 16:12:08,589 INFO L226 Difference]: Without dead ends: 174 [2022-11-16 16:12:08,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:12:08,590 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:08,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-16 16:12:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-16 16:12:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-11-16 16:12:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 123 states have (on average 3.5447154471544717) internal successors, (436), 173 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 16:12:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 436 transitions. [2022-11-16 16:12:08,598 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 436 transitions. Word has length 5 [2022-11-16 16:12:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:08,599 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 436 transitions. [2022-11-16 16:12:08,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 436 transitions. [2022-11-16 16:12:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:12:08,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:08,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:12:08,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:08,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:09,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:09,001 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash 702705078, now seen corresponding path program 1 times [2022-11-16 16:12:09,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:09,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686692389] [2022-11-16 16:12:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:09,001 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 16:12:09,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:09,002 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:09,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:12:09,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:09,145 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 16:12:09,146 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 22 [2022-11-16 16:12:09,172 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 16:12:09,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:09,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:09,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686692389] [2022-11-16 16:12:09,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686692389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:09,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:09,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:12:09,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413735041] [2022-11-16 16:12:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:09,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:09,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:09,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:09,174 INFO L87 Difference]: Start difference. First operand 174 states and 436 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:09,327 INFO L93 Difference]: Finished difference Result 163 states and 413 transitions. [2022-11-16 16:12:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:09,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 16:12:09,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:09,329 INFO L225 Difference]: With dead ends: 163 [2022-11-16 16:12:09,329 INFO L226 Difference]: Without dead ends: 163 [2022-11-16 16:12:09,329 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 16:12:09,330 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:09,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:12:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-16 16:12:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-16 16:12:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 119 states have (on average 3.4705882352941178) internal successors, (413), 162 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 16:12:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 413 transitions. [2022-11-16 16:12:09,336 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 413 transitions. Word has length 5 [2022-11-16 16:12:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:09,337 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 413 transitions. [2022-11-16 16:12:09,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 413 transitions. [2022-11-16 16:12:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:12:09,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:09,338 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 16:12:09,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:09,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:09,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash 308130104, now seen corresponding path program 2 times [2022-11-16 16:12:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:09,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663996764] [2022-11-16 16:12:09,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:12:09,539 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 16:12:09,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:09,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:09,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (13)] Waiting until timeout for monitored process [2022-11-16 16:12:09,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:12:09,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:12:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:09,726 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:09,726 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 16:12:09,948 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 16:12:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:10,827 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 16:12:10,827 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663996764] [2022-11-16 16:12:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663996764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471881464] [2022-11-16 16:12:10,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:12:10,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:10,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:10,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-16 16:12:11,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:12:11,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:11,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:12:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:11,097 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:11,097 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 16:12:11,213 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 16:12:11,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:11,394 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 16:12:11,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471881464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:11,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618128521] [2022-11-16 16:12:11,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:12:11,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:11,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:11,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 16:12:11,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:12:11,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:12:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:11,596 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:11,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:12:11,826 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 16:12:11,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:12,032 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 16:12:12,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618128521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:12,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:12:12,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-16 16:12:12,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298466381] [2022-11-16 16:12:12,033 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:12,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 16:12:12,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 16:12:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:12:12,034 INFO L87 Difference]: Start difference. First operand 163 states and 413 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:16,554 INFO L93 Difference]: Finished difference Result 1417 states and 3641 transitions. [2022-11-16 16:12:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:12:16,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 16:12:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:16,564 INFO L225 Difference]: With dead ends: 1417 [2022-11-16 16:12:16,564 INFO L226 Difference]: Without dead ends: 1417 [2022-11-16 16:12:16,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:12:16,566 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 768 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:16,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 56 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 16:12:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2022-11-16 16:12:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 169. [2022-11-16 16:12:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 125 states have (on average 3.4) internal successors, (425), 168 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 16:12:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2022-11-16 16:12:16,583 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 6 [2022-11-16 16:12:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:16,583 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2022-11-16 16:12:16,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2022-11-16 16:12:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:12:16,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:16,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:12:16,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:16,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (13)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:16,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:17,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:17,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash 309015199, now seen corresponding path program 1 times [2022-11-16 16:12:17,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:17,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678692094] [2022-11-16 16:12:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:17,192 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 16:12:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:17,193 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:17,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:17,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 16:12:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:17,320 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 16:12:17,320 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 16:12:17,346 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 16:12:17,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:17,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:17,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678692094] [2022-11-16 16:12:17,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678692094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:17,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:17,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:12:17,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652961408] [2022-11-16 16:12:17,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:17,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:12:17,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:17,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:12:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:12:17,347 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:17,490 INFO L93 Difference]: Finished difference Result 123 states and 302 transitions. [2022-11-16 16:12:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:12:17,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 16:12:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:17,492 INFO L225 Difference]: With dead ends: 123 [2022-11-16 16:12:17,492 INFO L226 Difference]: Without dead ends: 123 [2022-11-16 16:12:17,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:12:17,493 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:17,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:12:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-16 16:12:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-16 16:12:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 99 states have (on average 3.0505050505050506) internal successors, (302), 122 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 16:12:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 302 transitions. [2022-11-16 16:12:17,499 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 302 transitions. Word has length 6 [2022-11-16 16:12:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:17,499 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 302 transitions. [2022-11-16 16:12:17,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 302 transitions. [2022-11-16 16:12:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:12:17,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:17,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:12:17,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:17,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash 309015200, now seen corresponding path program 1 times [2022-11-16 16:12:17,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:17,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631298952] [2022-11-16 16:12:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:17,715 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 16:12:17,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:17,716 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:17,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (17)] Waiting until timeout for monitored process [2022-11-16 16:12:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:12:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:17,883 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 16:12:17,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:18,056 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 35 treesize of output 31 [2022-11-16 16:12:18,174 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 16:12:18,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631298952] [2022-11-16 16:12:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631298952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1053808642] [2022-11-16 16:12:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:18,175 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:18,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:18,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:18,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-16 16:12:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:12:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:18,414 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:18,414 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 16:12:18,606 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 16:12:18,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:18,936 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 16:12:18,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1053808642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604176884] [2022-11-16 16:12:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:18,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:18,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:18,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:18,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 16:12:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:19,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:12:19,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:19,115 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:19,115 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 16:12:19,280 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 16:12:19,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:19,395 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 16:12:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604176884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:19,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:12:19,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-16 16:12:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222706875] [2022-11-16 16:12:19,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:19,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:12:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:12:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:12:19,397 INFO L87 Difference]: Start difference. First operand 123 states and 302 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 16:12:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:20,265 INFO L93 Difference]: Finished difference Result 127 states and 308 transitions. [2022-11-16 16:12:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:12:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 16:12:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:20,268 INFO L225 Difference]: With dead ends: 127 [2022-11-16 16:12:20,268 INFO L226 Difference]: Without dead ends: 127 [2022-11-16 16:12:20,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:12:20,269 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:20,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 6 Unchecked, 0.6s Time] [2022-11-16 16:12:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-16 16:12:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-11-16 16:12:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 99 states have (on average 3.04040404040404) internal successors, (301), 122 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 16:12:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2022-11-16 16:12:20,272 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 6 [2022-11-16 16:12:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:20,273 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2022-11-16 16:12:20,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 16:12:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2022-11-16 16:12:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:12:20,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:20,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:20,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (17)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:20,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:20,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:20,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash 989536202, now seen corresponding path program 1 times [2022-11-16 16:12:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:20,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018179501] [2022-11-16 16:12:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:20,876 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 16:12:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:20,878 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:20,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:12:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:21,098 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 16:12:21,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:21,278 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 35 treesize of output 31 [2022-11-16 16:12:21,386 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 16:12:21,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:21,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018179501] [2022-11-16 16:12:21,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018179501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:21,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [883003008] [2022-11-16 16:12:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:21,387 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:21,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:21,388 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:21,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-16 16:12:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:12:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:21,644 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:21,645 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 16:12:21,846 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 16:12:21,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:22,196 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 16:12:22,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [883003008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:22,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671423280] [2022-11-16 16:12:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:22,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:22,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:22,198 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:22,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 16:12:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:12:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:22,382 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:22,382 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 16:12:22,556 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 16:12:22,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:22,703 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 16:12:22,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671423280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:22,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:12:22,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-16 16:12:22,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058645609] [2022-11-16 16:12:22,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:22,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:12:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:12:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:12:22,705 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:23,632 INFO L93 Difference]: Finished difference Result 130 states and 316 transitions. [2022-11-16 16:12:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:12:23,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:12:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:23,634 INFO L225 Difference]: With dead ends: 130 [2022-11-16 16:12:23,634 INFO L226 Difference]: Without dead ends: 130 [2022-11-16 16:12:23,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:12:23,635 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:23,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 13 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2022-11-16 16:12:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-16 16:12:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-11-16 16:12:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 3.04) internal successors, (304), 123 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 16:12:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 304 transitions. [2022-11-16 16:12:23,640 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 304 transitions. Word has length 7 [2022-11-16 16:12:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:23,641 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 304 transitions. [2022-11-16 16:12:23,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 304 transitions. [2022-11-16 16:12:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:12:23,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:23,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:23,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:23,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:24,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:24,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:24,243 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 989537188, now seen corresponding path program 1 times [2022-11-16 16:12:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:24,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003962543] [2022-11-16 16:12:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:24,244 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 16:12:24,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:24,245 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:24,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (23)] Waiting until timeout for monitored process [2022-11-16 16:12:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:24,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:12:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:24,435 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:24,435 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 16:12:24,672 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 16:12:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:24,943 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 16:12:24,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:24,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003962543] [2022-11-16 16:12:24,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003962543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:24,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [839204156] [2022-11-16 16:12:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:24,944 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:24,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-16 16:12:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:12:25,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:25,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:12:25,193 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 16:12:25,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 16:12:25,309 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 16:12:25,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:25,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [839204156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:25,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:12:25,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:12:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469388517] [2022-11-16 16:12:25,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:25,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:25,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:25,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:12:25,312 INFO L87 Difference]: Start difference. First operand 124 states and 304 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 16:12:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:25,397 INFO L93 Difference]: Finished difference Result 123 states and 300 transitions. [2022-11-16 16:12:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 16:12:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:25,398 INFO L225 Difference]: With dead ends: 123 [2022-11-16 16:12:25,398 INFO L226 Difference]: Without dead ends: 123 [2022-11-16 16:12:25,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:12:25,399 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:25,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-16 16:12:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-16 16:12:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-16 16:12:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 99 states have (on average 3.0303030303030303) internal successors, (300), 122 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 16:12:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 300 transitions. [2022-11-16 16:12:25,404 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 300 transitions. Word has length 7 [2022-11-16 16:12:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:25,404 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 300 transitions. [2022-11-16 16:12:25,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 16:12:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 300 transitions. [2022-11-16 16:12:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:12:25,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:25,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:25,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-11-16 16:12:25,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (23)] Ended with exit code 0 [2022-11-16 16:12:25,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:25,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:25,806 INFO L85 PathProgramCache]: Analyzing trace with hash 989537225, now seen corresponding path program 1 times [2022-11-16 16:12:25,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:25,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084709201] [2022-11-16 16:12:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:25,807 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 16:12:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:25,807 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:25,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:25,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:12:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:25,984 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:25,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 16:12:26,147 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 16:12:26,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:27,127 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 16:12:27,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084709201] [2022-11-16 16:12:27,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084709201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1298861707] [2022-11-16 16:12:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:27,128 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:27,130 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:27,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-16 16:12:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:27,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:12:27,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:27,387 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:27,388 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 16:12:27,570 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 16:12:27,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:27,862 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 16:12:27,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1298861707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:27,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659425429] [2022-11-16 16:12:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:27,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:27,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:27,863 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:27,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 16:12:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:12:27,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:28,040 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:28,040 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 16:12:28,221 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 16:12:28,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:28,520 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 16:12:28,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659425429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:28,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:12:28,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-11-16 16:12:28,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718531957] [2022-11-16 16:12:28,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:28,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:12:28,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:28,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:12:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:12:28,522 INFO L87 Difference]: Start difference. First operand 123 states and 300 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:29,349 INFO L93 Difference]: Finished difference Result 237 states and 621 transitions. [2022-11-16 16:12:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:12:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:12:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:29,352 INFO L225 Difference]: With dead ends: 237 [2022-11-16 16:12:29,352 INFO L226 Difference]: Without dead ends: 237 [2022-11-16 16:12:29,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:12:29,353 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 76 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:29,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 17 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 119 Unchecked, 0.4s Time] [2022-11-16 16:12:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-16 16:12:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2022-11-16 16:12:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 148 states have (on average 2.9324324324324325) internal successors, (434), 171 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 16:12:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 434 transitions. [2022-11-16 16:12:29,360 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 434 transitions. Word has length 7 [2022-11-16 16:12:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:29,361 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 434 transitions. [2022-11-16 16:12:29,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 434 transitions. [2022-11-16 16:12:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:12:29,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:29,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:29,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:29,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-16 16:12:29,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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)] Ended with exit code 0 [2022-11-16 16:12:29,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:29,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash 989535793, now seen corresponding path program 1 times [2022-11-16 16:12:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:29,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18212081] [2022-11-16 16:12:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:29,969 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 16:12:29,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:29,977 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:29,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (28)] Waiting until timeout for monitored process [2022-11-16 16:12:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:12:30,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:30,159 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:30,159 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 16:12:30,373 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 16:12:30,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:30,624 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 16:12:30,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18212081] [2022-11-16 16:12:30,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18212081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2132727446] [2022-11-16 16:12:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:30,625 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:30,626 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:30,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-16 16:12:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:30,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:12:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:12:30,860 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 16:12:30,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 16:12:30,971 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 16:12:30,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2132727446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:30,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:12:30,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:12:30,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133354470] [2022-11-16 16:12:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:30,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:30,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:30,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:12:30,974 INFO L87 Difference]: Start difference. First operand 172 states and 434 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 16:12:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:31,069 INFO L93 Difference]: Finished difference Result 175 states and 439 transitions. [2022-11-16 16:12:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 16:12:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:31,074 INFO L225 Difference]: With dead ends: 175 [2022-11-16 16:12:31,074 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 16:12:31,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:12:31,077 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:31,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-16 16:12:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 16:12:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-16 16:12:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 151 states have (on average 2.9072847682119205) internal successors, (439), 174 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 16:12:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 439 transitions. [2022-11-16 16:12:31,082 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 439 transitions. Word has length 7 [2022-11-16 16:12:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:31,082 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 439 transitions. [2022-11-16 16:12:31,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 16:12:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 439 transitions. [2022-11-16 16:12:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:12:31,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:31,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:31,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:31,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (28)] Ended with exit code 0 [2022-11-16 16:12:31,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:31,487 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 989731452, now seen corresponding path program 1 times [2022-11-16 16:12:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:31,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206099334] [2022-11-16 16:12:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:31,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:12:31,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:31,488 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:31,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (30)] Waiting until timeout for monitored process [2022-11-16 16:12:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:12:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:31,630 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 16:12:31,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:31,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206099334] [2022-11-16 16:12:31,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206099334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:31,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:31,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:12:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962673906] [2022-11-16 16:12:31,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:31,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:12:31,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:12:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:12:31,632 INFO L87 Difference]: Start difference. First operand 175 states and 439 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:31,755 INFO L93 Difference]: Finished difference Result 147 states and 353 transitions. [2022-11-16 16:12:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:12:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:31,757 INFO L225 Difference]: With dead ends: 147 [2022-11-16 16:12:31,757 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 16:12:31,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:12:31,758 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:31,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:12:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 16:12:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-16 16:12:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 129 states have (on average 2.7364341085271318) internal successors, (353), 146 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 16:12:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 353 transitions. [2022-11-16 16:12:31,768 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 353 transitions. Word has length 7 [2022-11-16 16:12:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:31,768 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 353 transitions. [2022-11-16 16:12:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 353 transitions. [2022-11-16 16:12:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:12:31,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:31,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:31,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (30)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:31,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:31,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:31,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash 989731453, now seen corresponding path program 1 times [2022-11-16 16:12:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:31,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380224198] [2022-11-16 16:12:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:31,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:12:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:31,985 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:32,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (31)] Waiting until timeout for monitored process [2022-11-16 16:12:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:32,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:12:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:32,106 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 16:12:32,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:32,106 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:32,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380224198] [2022-11-16 16:12:32,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380224198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:32,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:32,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:12:32,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977805492] [2022-11-16 16:12:32,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:32,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:32,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:32,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:32,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:32,108 INFO L87 Difference]: Start difference. First operand 147 states and 353 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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 16:12:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:32,251 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2022-11-16 16:12:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 16:12:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:32,253 INFO L225 Difference]: With dead ends: 119 [2022-11-16 16:12:32,253 INFO L226 Difference]: Without dead ends: 119 [2022-11-16 16:12:32,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 16:12:32,254 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:32,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:12:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-16 16:12:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-16 16:12:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 2.4953271028037385) internal successors, (267), 118 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 16:12:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 267 transitions. [2022-11-16 16:12:32,263 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 267 transitions. Word has length 7 [2022-11-16 16:12:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:32,263 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 267 transitions. [2022-11-16 16:12:32,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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 16:12:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 267 transitions. [2022-11-16 16:12:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:12:32,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:32,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:32,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (31)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:32,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:32,474 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 610882088, now seen corresponding path program 1 times [2022-11-16 16:12:32,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:32,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646138589] [2022-11-16 16:12:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:32,475 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 16:12:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:32,475 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:32,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (32)] Waiting until timeout for monitored process [2022-11-16 16:12:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:32,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:12:32,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:32,606 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 16:12:32,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:32,667 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 16:12:32,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646138589] [2022-11-16 16:12:32,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646138589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1358309188] [2022-11-16 16:12:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:32,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:32,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:32,670 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:32,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-16 16:12:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:12:32,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:32,905 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 16:12:32,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:32,921 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 16:12:32,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1358309188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058181775] [2022-11-16 16:12:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:32,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:32,923 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:32,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 16:12:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:12:33,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:33,066 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 16:12:33,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:33,083 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 16:12:33,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058181775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:33,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:12:33,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-16 16:12:33,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486149229] [2022-11-16 16:12:33,084 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:33,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:12:33,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:33,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:12:33,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:12:33,086 INFO L87 Difference]: Start difference. First operand 119 states and 267 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 16:12:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:33,507 INFO L93 Difference]: Finished difference Result 258 states and 593 transitions. [2022-11-16 16:12:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:12:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 8 [2022-11-16 16:12:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:33,509 INFO L225 Difference]: With dead ends: 258 [2022-11-16 16:12:33,509 INFO L226 Difference]: Without dead ends: 258 [2022-11-16 16:12:33,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:12:33,510 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:33,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 10 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-11-16 16:12:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-16 16:12:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 169. [2022-11-16 16:12:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 2.7770700636942673) internal successors, (436), 168 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 16:12:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 436 transitions. [2022-11-16 16:12:33,517 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 436 transitions. Word has length 8 [2022-11-16 16:12:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:33,517 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 436 transitions. [2022-11-16 16:12:33,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 16:12:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 436 transitions. [2022-11-16 16:12:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:12:33,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:33,518 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:33,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (32)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:33,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-16 16:12:33,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-16 16:12:34,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:34,119 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1189435657, now seen corresponding path program 2 times [2022-11-16 16:12:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:34,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452548490] [2022-11-16 16:12:34,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:12:34,120 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 16:12:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:34,121 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:34,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (35)] Waiting until timeout for monitored process [2022-11-16 16:12:34,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:12:34,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:34,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:12:34,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:34,302 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:34,302 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 16:12:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:12:34,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:34,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452548490] [2022-11-16 16:12:34,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452548490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:34,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:34,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:12:34,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063960824] [2022-11-16 16:12:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:34,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:12:34,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:12:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:12:34,436 INFO L87 Difference]: Start difference. First operand 169 states and 436 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:34,635 INFO L93 Difference]: Finished difference Result 126 states and 300 transitions. [2022-11-16 16:12:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:12:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 16:12:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:34,636 INFO L225 Difference]: With dead ends: 126 [2022-11-16 16:12:34,636 INFO L226 Difference]: Without dead ends: 126 [2022-11-16 16:12:34,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:12:34,637 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:34,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:12:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-16 16:12:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 71. [2022-11-16 16:12:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 2.373134328358209) internal successors, (159), 70 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 16:12:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 159 transitions. [2022-11-16 16:12:34,641 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 159 transitions. Word has length 9 [2022-11-16 16:12:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:34,641 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 159 transitions. [2022-11-16 16:12:34,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 159 transitions. [2022-11-16 16:12:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:12:34,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:34,642 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:34,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (35)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:34,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:34,853 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1757519121, now seen corresponding path program 2 times [2022-11-16 16:12:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:34,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272166820] [2022-11-16 16:12:34,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:12:34,854 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 16:12:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:34,855 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:34,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (36)] Waiting until timeout for monitored process [2022-11-16 16:12:34,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:12:34,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:12:34,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:12:34,995 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 16:12:34,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 16:12:35,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 16:12:35,079 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 16:12:35,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:12:35,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272166820] [2022-11-16 16:12:35,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272166820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:12:35,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:12:35,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:12:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784677359] [2022-11-16 16:12:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:12:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:12:35,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:35,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:12:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:35,081 INFO L87 Difference]: Start difference. First operand 71 states and 159 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:35,170 INFO L93 Difference]: Finished difference Result 67 states and 152 transitions. [2022-11-16 16:12:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:12:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 16:12:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:35,171 INFO L225 Difference]: With dead ends: 67 [2022-11-16 16:12:35,171 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 16:12:35,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:12:35,172 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:35,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:12:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 16:12:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-11-16 16:12:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 2.359375) internal successors, (151), 65 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 16:12:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 151 transitions. [2022-11-16 16:12:35,176 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 151 transitions. Word has length 9 [2022-11-16 16:12:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:35,176 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 151 transitions. [2022-11-16 16:12:35,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:12:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 151 transitions. [2022-11-16 16:12:35,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:12:35,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:35,177 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 16:12:35,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (36)] Ended with exit code 0 [2022-11-16 16:12:35,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:35,388 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:12:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:35,388 INFO L85 PathProgramCache]: Analyzing trace with hash -283178632, now seen corresponding path program 3 times [2022-11-16 16:12:35,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:12:35,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413130006] [2022-11-16 16:12:35,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:12:35,389 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 16:12:35,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:12:35,390 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:12:35,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (37)] Waiting until timeout for monitored process [2022-11-16 16:12:35,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:12:35,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:12:35,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:35,716 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:35,717 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 16:12:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:36,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:39,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:12:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413130006] [2022-11-16 16:12:39,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413130006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713673402] [2022-11-16 16:12:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:12:39,542 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:12:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:12:39,543 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:12:39,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-16 16:12:40,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:12:40,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:12:40,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:40,345 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:40,345 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 16:12:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:40,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:44,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1713673402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:44,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426370831] [2022-11-16 16:12:44,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:12:44,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:44,196 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:44,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 16:12:45,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:12:45,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:45,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:12:45,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:45,968 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 16:12:45,968 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 16:12:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:47,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:47,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426370831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:47,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:12:47,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-16 16:12:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751001311] [2022-11-16 16:12:47,395 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 16:12:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:12:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 16:12:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:12:47,397 INFO L87 Difference]: Start difference. First operand 66 states and 151 transitions. Second operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 16:13:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:13:09,187 INFO L93 Difference]: Finished difference Result 1138 states and 2735 transitions. [2022-11-16 16:13:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 16:13:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:13:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:13:09,194 INFO L225 Difference]: With dead ends: 1138 [2022-11-16 16:13:09,194 INFO L226 Difference]: Without dead ends: 1138 [2022-11-16 16:13:09,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=940, Invalid=1922, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 16:13:09,196 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2190 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2190 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:13:09,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2190 Valid, 356 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2547 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-16 16:13:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-11-16 16:13:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 78. [2022-11-16 16:13:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 2.3026315789473686) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 16:13:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 175 transitions. [2022-11-16 16:13:09,209 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 175 transitions. Word has length 12 [2022-11-16 16:13:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:13:09,209 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 175 transitions. [2022-11-16 16:13:09,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 16:13:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 175 transitions. [2022-11-16 16:13:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:13:09,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:13:09,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:13:09,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-16 16:13:09,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (37)] Ended with exit code 0 [2022-11-16 16:13:09,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-16 16:13:09,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:13:09,816 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:13:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:13:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash -841326259, now seen corresponding path program 1 times [2022-11-16 16:13:09,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:13:09,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718843562] [2022-11-16 16:13:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:13:09,817 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 16:13:09,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:13:09,818 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:09,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (40)] Waiting until timeout for monitored process [2022-11-16 16:13:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:13:09,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 16:13:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:09,989 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 16:13:09,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:13:09,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:13:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718843562] [2022-11-16 16:13:09,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718843562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:13:09,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:13:09,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:13:09,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143151573] [2022-11-16 16:13:09,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:13:09,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:13:09,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:13:09,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:13:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:13:09,991 INFO L87 Difference]: Start difference. First operand 78 states and 175 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 16:13:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:13:10,107 INFO L93 Difference]: Finished difference Result 101 states and 223 transitions. [2022-11-16 16:13:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:13:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:13:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:13:10,109 INFO L225 Difference]: With dead ends: 101 [2022-11-16 16:13:10,109 INFO L226 Difference]: Without dead ends: 96 [2022-11-16 16:13:10,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 16:13:10,110 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:13:10,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:13:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-16 16:13:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-11-16 16:13:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 2.282608695652174) internal successors, (210), 93 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 16:13:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 210 transitions. [2022-11-16 16:13:10,114 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 210 transitions. Word has length 15 [2022-11-16 16:13:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:13:10,117 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 210 transitions. [2022-11-16 16:13:10,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 16:13:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 210 transitions. [2022-11-16 16:13:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:13:10,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:13:10,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:13:10,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (40)] Forceful destruction successful, exit code 0 [2022-11-16 16:13:10,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:10,330 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:13:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:13:10,331 INFO L85 PathProgramCache]: Analyzing trace with hash -237975236, now seen corresponding path program 1 times [2022-11-16 16:13:10,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:13:10,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316926370] [2022-11-16 16:13:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:13:10,331 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 16:13:10,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:13:10,332 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:10,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (41)] Waiting until timeout for monitored process [2022-11-16 16:13:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:13:10,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:13:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:13:10,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:13:10,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:13:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316926370] [2022-11-16 16:13:10,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316926370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:13:10,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:13:10,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:13:10,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271602099] [2022-11-16 16:13:10,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:13:10,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:13:10,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:13:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:13:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:13:10,509 INFO L87 Difference]: Start difference. First operand 94 states and 210 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 16:13:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:13:10,713 INFO L93 Difference]: Finished difference Result 104 states and 218 transitions. [2022-11-16 16:13:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:13:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-16 16:13:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:13:10,714 INFO L225 Difference]: With dead ends: 104 [2022-11-16 16:13:10,715 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 16:13:10,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 16:13:10,715 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:13:10,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:13:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 16:13:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-11-16 16:13:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 2.238095238095238) internal successors, (188), 85 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 16:13:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 188 transitions. [2022-11-16 16:13:10,719 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 188 transitions. Word has length 16 [2022-11-16 16:13:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:13:10,719 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 188 transitions. [2022-11-16 16:13:10,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 16:13:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 188 transitions. [2022-11-16 16:13:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:13:10,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:13:10,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:13:10,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (41)] Forceful destruction successful, exit code 0 [2022-11-16 16:13:10,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:10,932 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:13:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:13:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1975093404, now seen corresponding path program 2 times [2022-11-16 16:13:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:13:10,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924514612] [2022-11-16 16:13:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:13:10,934 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 16:13:10,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:13:10,935 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:10,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (42)] Waiting until timeout for monitored process [2022-11-16 16:13:11,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:13:11,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:13:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:13:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:11,171 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 16:13:11,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:13:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:13:11,245 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:13:11,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924514612] [2022-11-16 16:13:11,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924514612] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 16:13:11,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:13:11,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-16 16:13:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211229892] [2022-11-16 16:13:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:13:11,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:13:11,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:13:11,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:13:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:13:11,247 INFO L87 Difference]: Start difference. First operand 86 states and 188 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 16:13:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:13:11,587 INFO L93 Difference]: Finished difference Result 108 states and 235 transitions. [2022-11-16 16:13:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:13:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-16 16:13:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:13:11,589 INFO L225 Difference]: With dead ends: 108 [2022-11-16 16:13:11,589 INFO L226 Difference]: Without dead ends: 108 [2022-11-16 16:13:11,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:13:11,589 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:13:11,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 7 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:13:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-16 16:13:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 76. [2022-11-16 16:13:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 75 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 16:13:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2022-11-16 16:13:11,593 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 16 [2022-11-16 16:13:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:13:11,593 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2022-11-16 16:13:11,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 16:13:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2022-11-16 16:13:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:13:11,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:13:11,594 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:13:11,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (42)] Forceful destruction successful, exit code 0 [2022-11-16 16:13:11,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:11,806 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:13:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:13:11,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1325768941, now seen corresponding path program 1 times [2022-11-16 16:13:11,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:13:11,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542989701] [2022-11-16 16:13:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:13:11,807 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 16:13:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:13:11,808 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (43)] Waiting until timeout for monitored process [2022-11-16 16:13:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:13:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:13:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:13:12,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:13:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:13:12,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:13:12,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542989701] [2022-11-16 16:13:12,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542989701] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 16:13:12,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:13:12,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-16 16:13:12,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411823887] [2022-11-16 16:13:12,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:13:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:13:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:13:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:13:12,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:13:12,153 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:13:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:13:12,376 INFO L93 Difference]: Finished difference Result 92 states and 203 transitions. [2022-11-16 16:13:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:13:12,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 16:13:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:13:12,381 INFO L225 Difference]: With dead ends: 92 [2022-11-16 16:13:12,381 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 16:13:12,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:13:12,382 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:13:12,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:13:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 16:13:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2022-11-16 16:13:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 2.2) internal successors, (176), 81 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 16:13:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2022-11-16 16:13:12,386 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 17 [2022-11-16 16:13:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:13:12,386 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2022-11-16 16:13:12,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:13:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2022-11-16 16:13:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:13:12,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:13:12,388 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:13:12,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (43)] Forceful destruction successful, exit code 0 [2022-11-16 16:13:12,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:12,600 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:13:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:13:12,600 INFO L85 PathProgramCache]: Analyzing trace with hash 320577773, now seen corresponding path program 2 times [2022-11-16 16:13:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:13:12,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898159626] [2022-11-16 16:13:12,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:13:12,601 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 16:13:12,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:13:12,602 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:12,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (44)] Waiting until timeout for monitored process [2022-11-16 16:13:12,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:13:12,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:13:12,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:13:12,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:13:12,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:13:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:13:13,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:13:13,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898159626] [2022-11-16 16:13:13,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898159626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:13:13,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1095270520] [2022-11-16 16:13:13,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:13:13,009 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:13:13,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:13:13,013 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:13:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-16 16:13:13,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:13:13,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:13:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:13:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:13:13,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:13:13,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1095270520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:13:13,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:13:13,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2022-11-16 16:13:13,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090650199] [2022-11-16 16:13:13,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:13:13,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:13:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:13:13,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:13:13,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:13:13,371 INFO L87 Difference]: Start difference. First operand 82 states and 176 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:13:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:13:13,613 INFO L93 Difference]: Finished difference Result 114 states and 242 transitions. [2022-11-16 16:13:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:13:13,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 16:13:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:13:13,615 INFO L225 Difference]: With dead ends: 114 [2022-11-16 16:13:13,615 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 16:13:13,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:13:13,616 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:13:13,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:13:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 16:13:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2022-11-16 16:13:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 2.261904761904762) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 16:13:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 190 transitions. [2022-11-16 16:13:13,620 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 190 transitions. Word has length 17 [2022-11-16 16:13:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:13:13,620 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 190 transitions. [2022-11-16 16:13:13,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:13:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 190 transitions. [2022-11-16 16:13:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:13:13,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:13:13,621 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:13:13,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-16 16:13:13,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (44)] Forceful destruction successful, exit code 0 [2022-11-16 16:13:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:14,028 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:13:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:13:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1222345363, now seen corresponding path program 3 times [2022-11-16 16:13:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:13:14,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174729547] [2022-11-16 16:13:14,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:13:14,029 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 16:13:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:13:14,030 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:14,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (46)] Waiting until timeout for monitored process [2022-11-16 16:13:14,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:13:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:13:14,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:13:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:13:14,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:13:14,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:13:14,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174729547] [2022-11-16 16:13:14,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174729547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:13:14,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:13:14,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:13:14,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827627226] [2022-11-16 16:13:14,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:13:14,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:13:14,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:13:14,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:13:14,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:13:14,219 INFO L87 Difference]: Start difference. First operand 86 states and 190 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:13:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:13:14,398 INFO L93 Difference]: Finished difference Result 90 states and 194 transitions. [2022-11-16 16:13:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:13:14,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 16:13:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:13:14,399 INFO L225 Difference]: With dead ends: 90 [2022-11-16 16:13:14,399 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 16:13:14,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 16:13:14,400 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:13:14,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:13:14,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 16:13:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-16 16:13:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 2.2142857142857144) internal successors, (186), 85 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 16:13:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2022-11-16 16:13:14,403 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 17 [2022-11-16 16:13:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:13:14,404 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2022-11-16 16:13:14,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:13:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2022-11-16 16:13:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 16:13:14,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:13:14,405 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:13:14,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (46)] Forceful destruction successful, exit code 0 [2022-11-16 16:13:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:14,618 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-16 16:13:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:13:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1777500772, now seen corresponding path program 1 times [2022-11-16 16:13:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:13:14,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455544033] [2022-11-16 16:13:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:13:14,620 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 16:13:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:13:14,621 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 16:13:14,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef774e1-d222-4c30-9450-006dfc0b4fa8/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 (47)] Waiting until timeout for monitored process [2022-11-16 16:13:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:13:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:13:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:13:15,184 INFO L321 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2022-11-16 16:13:15,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2022-11-16 16:13:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:13:16,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:13:24,783 INFO L321 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2022-11-16 16:13:24,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348