./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:07:00,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:07:00,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:07:00,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:07:00,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:07:00,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:07:00,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:07:00,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:07:00,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:07:00,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:07:00,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:07:00,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:07:00,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:07:00,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:07:00,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:07:00,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:07:00,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:07:00,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:07:00,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:07:00,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:07:00,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:07:00,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:07:00,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:07:00,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:07:00,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:07:00,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:07:00,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:07:00,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:07:00,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:07:00,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:07:00,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:07:00,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:07:00,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:07:00,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:07:00,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:07:00,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:07:00,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:07:00,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:07:00,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:07:00,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:07:00,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:07:00,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:07:00,593 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:07:00,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:07:00,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:07:00,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:07:00,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:07:00,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:07:00,595 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:07:00,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:07:00,596 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:07:00,596 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:07:00,596 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:07:00,596 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:07:00,597 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:07:00,597 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:07:00,597 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:07:00,597 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:07:00,598 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:07:00,598 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:07:00,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:07:00,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:07:00,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:07:00,599 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:07:00,599 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:07:00,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:07:00,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:07:00,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:07:00,600 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:07:00,600 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:07:00,601 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:07:00,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:07:00,601 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:07:00,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:07:00,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:07:00,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:07:00,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:07:00,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:07:00,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:07:00,603 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:07:00,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:07:00,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:07:00,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:07:00,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:07:00,604 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_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-11-19 07:07:00,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:07:00,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:07:00,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:07:00,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:07:00,936 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:07:00,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-19 07:07:01,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/b20cceb02/b77a29e4234340c1b061f01ad7700e21/FLAG2ea023c38 [2022-11-19 07:07:01,559 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:07:01,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-19 07:07:01,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/b20cceb02/b77a29e4234340c1b061f01ad7700e21/FLAG2ea023c38 [2022-11-19 07:07:01,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/b20cceb02/b77a29e4234340c1b061f01ad7700e21 [2022-11-19 07:07:01,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:07:01,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:07:01,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:07:01,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:07:01,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:07:01,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:07:01" (1/1) ... [2022-11-19 07:07:01,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e48bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:01, skipping insertion in model container [2022-11-19 07:07:01,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:07:01" (1/1) ... [2022-11-19 07:07:01,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:07:01,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:07:02,246 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-19 07:07:02,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:07:02,269 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 07:07:02,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c472421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:02, skipping insertion in model container [2022-11-19 07:07:02,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:07:02,270 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:07:02,273 INFO L158 Benchmark]: Toolchain (without parser) took 345.91ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 62.4MB in the beginning and 107.6MB in the end (delta: -45.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:07:02,274 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:07:02,275 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.26ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 62.2MB in the beginning and 107.6MB in the end (delta: -45.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:07:02,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.26ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 62.2MB in the beginning and 107.6MB in the end (delta: -45.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: 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_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:07:04,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:07:04,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:07:04,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:07:04,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:07:04,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:07:04,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:07:04,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:07:04,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:07:04,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:07:04,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:07:04,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:07:04,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:07:04,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:07:04,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:07:04,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:07:04,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:07:04,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:07:04,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:07:04,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:07:04,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:07:04,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:07:04,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:07:04,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:07:04,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:07:04,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:07:04,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:07:04,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:07:04,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:07:04,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:07:04,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:07:04,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:07:04,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:07:04,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:07:04,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:07:04,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:07:04,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:07:04,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:07:04,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:07:04,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:07:04,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:07:04,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:07:04,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:07:04,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:07:04,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:07:04,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:07:04,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:07:04,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:07:04,954 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:07:04,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:07:04,955 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:07:04,955 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:07:04,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:07:04,957 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:07:04,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:07:04,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:07:04,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:07:04,960 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:07:04,960 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:07:04,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:07:04,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:07:04,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:07:04,961 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:07:04,962 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:07:04,962 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:07:04,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:07:04,963 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:07:04,963 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:07:04,964 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:07:04,964 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:07:04,964 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:07:04,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:07:04,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:07:04,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:07:04,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:07:04,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:07:04,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:07:04,968 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:07:04,968 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:04,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:07:04,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:07:04,969 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_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-11-19 07:07:05,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:07:05,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:07:05,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:07:05,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:07:05,495 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:07:05,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-19 07:07:05,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/4efc6790b/b31c46d1b8dc4f13a188faef16411e73/FLAG215b488dd [2022-11-19 07:07:06,136 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:07:06,137 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-19 07:07:06,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/4efc6790b/b31c46d1b8dc4f13a188faef16411e73/FLAG215b488dd [2022-11-19 07:07:06,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/data/4efc6790b/b31c46d1b8dc4f13a188faef16411e73 [2022-11-19 07:07:06,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:07:06,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:07:06,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:07:06,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:07:06,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:07:06,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156dca6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06, skipping insertion in model container [2022-11-19 07:07:06,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:07:06,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:07:06,735 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-19 07:07:06,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:07:06,796 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:07:06,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:07:06,832 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-19 07:07:06,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:07:06,843 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:07:06,869 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-19 07:07:06,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:07:06,893 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:07:06,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06 WrapperNode [2022-11-19 07:07:06,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:07:06,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:07:06,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:07:06,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:07:06,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,943 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-11-19 07:07:06,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:07:06,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:07:06,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:07:06,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:07:06,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,982 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:07:06,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:07:06,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:07:06,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:07:06,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (1/1) ... [2022-11-19 07:07:06,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:07:07,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:07,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:07:07,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:07:07,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:07:07,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:07:07,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:07:07,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:07:07,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:07:07,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:07:07,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:07:07,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:07:07,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:07:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:07:07,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 07:07:07,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 07:07:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:07:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:07:07,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:07:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:07:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:07:07,093 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:07:07,304 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:07:07,307 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:07:07,999 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:07:08,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:07:08,182 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:07:08,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:07:08 BoogieIcfgContainer [2022-11-19 07:07:08,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:07:08,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:07:08,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:07:08,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:07:08,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:07:06" (1/3) ... [2022-11-19 07:07:08,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560a8880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:07:08, skipping insertion in model container [2022-11-19 07:07:08,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:07:06" (2/3) ... [2022-11-19 07:07:08,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560a8880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:07:08, skipping insertion in model container [2022-11-19 07:07:08,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:07:08" (3/3) ... [2022-11-19 07:07:08,209 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2022-11-19 07:07:08,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:07:08,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-19 07:07:08,231 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:07:08,365 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 07:07:08,406 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:07:08,424 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 177 transitions, 378 flow [2022-11-19 07:07:08,427 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 177 transitions, 378 flow [2022-11-19 07:07:08,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 177 transitions, 378 flow [2022-11-19 07:07:08,513 INFO L130 PetriNetUnfolder]: 10/174 cut-off events. [2022-11-19 07:07:08,514 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 07:07:08,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 10/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-19 07:07:08,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2022-11-19 07:07:33,540 INFO L134 LiptonReduction]: Checked pairs total: 2788 [2022-11-19 07:07:33,541 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-19 07:07:33,550 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 53 transitions, 130 flow [2022-11-19 07:07:33,617 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:33,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:07:33,642 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;@2eacdddd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:07:33,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-19 07:07:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:07:33,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:33,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:07:33,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash 22077, now seen corresponding path program 1 times [2022-11-19 07:07:33,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:33,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978559118] [2022-11-19 07:07:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:33,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:33,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:33,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:07:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:07:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:34,066 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:34,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:34,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:34,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978559118] [2022-11-19 07:07:34,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978559118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:34,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:34,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:07:34,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233151379] [2022-11-19 07:07:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:34,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:34,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:34,146 INFO L87 Difference]: Start difference. First operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:34,392 INFO L93 Difference]: Finished difference Result 378 states and 1113 transitions. [2022-11-19 07:07:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:07:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:34,409 INFO L225 Difference]: With dead ends: 378 [2022-11-19 07:07:34,409 INFO L226 Difference]: Without dead ends: 378 [2022-11-19 07:07:34,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:34,413 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:34,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:07:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-19 07:07:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-19 07:07:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 314 states have (on average 3.5445859872611467) internal successors, (1113), 377 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1113 transitions. [2022-11-19 07:07:34,497 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1113 transitions. Word has length 2 [2022-11-19 07:07:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:34,498 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1113 transitions. [2022-11-19 07:07:34,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1113 transitions. [2022-11-19 07:07:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:07:34,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:34,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:07:34,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:34,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:34,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash 22079, now seen corresponding path program 1 times [2022-11-19 07:07:34,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:34,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323714680] [2022-11-19 07:07:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:34,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:34,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:34,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:34,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:07:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:34,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:07:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:34,961 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:34,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:35,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:35,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:35,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323714680] [2022-11-19 07:07:35,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323714680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:35,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:35,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:07:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165537686] [2022-11-19 07:07:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:35,005 INFO L87 Difference]: Start difference. First operand 378 states and 1113 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:35,319 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2022-11-19 07:07:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:07:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:35,325 INFO L225 Difference]: With dead ends: 381 [2022-11-19 07:07:35,325 INFO L226 Difference]: Without dead ends: 381 [2022-11-19 07:07:35,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:35,327 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:35,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:07:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-19 07:07:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 379. [2022-11-19 07:07:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 315 states have (on average 3.5428571428571427) internal successors, (1116), 378 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1116 transitions. [2022-11-19 07:07:35,367 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1116 transitions. Word has length 2 [2022-11-19 07:07:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:35,367 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 1116 transitions. [2022-11-19 07:07:35,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1116 transitions. [2022-11-19 07:07:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:07:35,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:35,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:07:35,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:35,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:35,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash 21952, now seen corresponding path program 1 times [2022-11-19 07:07:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203780019] [2022-11-19 07:07:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:35,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:35,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:35,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:35,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:07:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:07:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:35,738 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:07:35,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 07:07:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:35,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:35,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:35,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203780019] [2022-11-19 07:07:35,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203780019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:35,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:35,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:07:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142336879] [2022-11-19 07:07:35,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:35,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:35,764 INFO L87 Difference]: Start difference. First operand 379 states and 1116 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:35,963 INFO L93 Difference]: Finished difference Result 377 states and 1112 transitions. [2022-11-19 07:07:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:07:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:35,968 INFO L225 Difference]: With dead ends: 377 [2022-11-19 07:07:35,968 INFO L226 Difference]: Without dead ends: 377 [2022-11-19 07:07:35,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:35,969 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:35,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:07:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-19 07:07:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-19 07:07:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 315 states have (on average 3.53015873015873) internal successors, (1112), 376 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1112 transitions. [2022-11-19 07:07:36,021 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1112 transitions. Word has length 2 [2022-11-19 07:07:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:36,022 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 1112 transitions. [2022-11-19 07:07:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1112 transitions. [2022-11-19 07:07:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:07:36,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:36,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:07:36,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:36,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:36,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash 684425, now seen corresponding path program 1 times [2022-11-19 07:07:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:36,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095534104] [2022-11-19 07:07:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:36,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:36,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:36,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:36,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:07:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:36,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:07:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:36,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:36,501 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:07:36,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-19 07:07:36,543 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:07:36,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:07:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:36,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:36,826 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095534104] [2022-11-19 07:07:36,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095534104] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:07:36,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:07:36,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-19 07:07:36,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843627875] [2022-11-19 07:07:36,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:36,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:07:36,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:07:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:07:36,828 INFO L87 Difference]: Start difference. First operand 377 states and 1112 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:37,054 INFO L93 Difference]: Finished difference Result 326 states and 936 transitions. [2022-11-19 07:07:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:37,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:07:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:37,057 INFO L225 Difference]: With dead ends: 326 [2022-11-19 07:07:37,058 INFO L226 Difference]: Without dead ends: 326 [2022-11-19 07:07:37,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:07:37,059 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:37,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:07:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-19 07:07:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-11-19 07:07:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 274 states have (on average 3.4160583941605838) internal successors, (936), 325 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 936 transitions. [2022-11-19 07:07:37,089 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 936 transitions. Word has length 3 [2022-11-19 07:07:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:37,090 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 936 transitions. [2022-11-19 07:07:37,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 936 transitions. [2022-11-19 07:07:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:07:37,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:37,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:07:37,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:37,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:37,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash 684426, now seen corresponding path program 1 times [2022-11-19 07:07:37,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:37,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468825838] [2022-11-19 07:07:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:37,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:37,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:37,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:07:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:07:37,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:37,575 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-19 07:07:37,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-19 07:07:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:37,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:37,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468825838] [2022-11-19 07:07:37,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468825838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:37,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:37,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:07:37,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47846428] [2022-11-19 07:07:37,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:37,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:37,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:37,675 INFO L87 Difference]: Start difference. First operand 326 states and 936 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:37,831 INFO L93 Difference]: Finished difference Result 325 states and 935 transitions. [2022-11-19 07:07:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:07:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:37,834 INFO L225 Difference]: With dead ends: 325 [2022-11-19 07:07:37,834 INFO L226 Difference]: Without dead ends: 325 [2022-11-19 07:07:37,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:37,836 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:37,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-19 07:07:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-19 07:07:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-11-19 07:07:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 274 states have (on average 3.4124087591240877) internal successors, (935), 324 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 935 transitions. [2022-11-19 07:07:37,853 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 935 transitions. Word has length 3 [2022-11-19 07:07:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:37,854 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 935 transitions. [2022-11-19 07:07:37,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 935 transitions. [2022-11-19 07:07:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:07:37,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:37,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:07:37,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:38,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:38,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash 684299, now seen corresponding path program 1 times [2022-11-19 07:07:38,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:38,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032506118] [2022-11-19 07:07:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:38,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:38,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:38,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-19 07:07:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:07:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:38,290 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:38,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:38,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:38,648 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:38,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032506118] [2022-11-19 07:07:38,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032506118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:38,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824570713] [2022-11-19 07:07:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:38,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:07:38,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:07:38,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-19 07:07:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:38,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:07:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:38,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:38,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:39,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:39,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824570713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116216991] [2022-11-19 07:07:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:39,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:39,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:39,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:39,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:07:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:07:39,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:39,327 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:39,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:39,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:39,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116216991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:39,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:07:39,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 07:07:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866199171] [2022-11-19 07:07:39,531 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:07:39,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:07:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:07:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:07:39,532 INFO L87 Difference]: Start difference. First operand 325 states and 935 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:40,490 INFO L93 Difference]: Finished difference Result 649 states and 1871 transitions. [2022-11-19 07:07:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:07:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:07:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:40,495 INFO L225 Difference]: With dead ends: 649 [2022-11-19 07:07:40,496 INFO L226 Difference]: Without dead ends: 649 [2022-11-19 07:07:40,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:07:40,497 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 133 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:40,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 8 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:07:40,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-19 07:07:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 328. [2022-11-19 07:07:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 277 states have (on average 3.3971119133574006) internal successors, (941), 327 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 941 transitions. [2022-11-19 07:07:40,526 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 941 transitions. Word has length 3 [2022-11-19 07:07:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:40,526 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 941 transitions. [2022-11-19 07:07:40,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 941 transitions. [2022-11-19 07:07:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:07:40,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:40,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:07:40,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:40,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:40,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:41,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:41,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash 657744727, now seen corresponding path program 1 times [2022-11-19 07:07:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:41,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356597333] [2022-11-19 07:07:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:41,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:41,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:41,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 07:07:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:07:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:41,341 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 07:07:41,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 07:07:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:41,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:41,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356597333] [2022-11-19 07:07:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356597333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:41,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:41,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:07:41,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420990029] [2022-11-19 07:07:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:41,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:41,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:41,467 INFO L87 Difference]: Start difference. First operand 328 states and 941 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:41,564 INFO L93 Difference]: Finished difference Result 328 states and 945 transitions. [2022-11-19 07:07:41,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:41,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:07:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:41,566 INFO L225 Difference]: With dead ends: 328 [2022-11-19 07:07:41,567 INFO L226 Difference]: Without dead ends: 328 [2022-11-19 07:07:41,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:41,567 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:41,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-19 07:07:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-19 07:07:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-11-19 07:07:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 277 states have (on average 3.411552346570397) internal successors, (945), 327 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 945 transitions. [2022-11-19 07:07:41,580 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 945 transitions. Word has length 5 [2022-11-19 07:07:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:41,580 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 945 transitions. [2022-11-19 07:07:41,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 945 transitions. [2022-11-19 07:07:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:07:41,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:41,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:07:41,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:41,793 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 657744728, now seen corresponding path program 1 times [2022-11-19 07:07:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:41,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870042304] [2022-11-19 07:07:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:41,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:41,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:41,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 07:07:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:07:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:41,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,082 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-19 07:07:42,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-19 07:07:42,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 07:07:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:42,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:42,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870042304] [2022-11-19 07:07:42,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870042304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [157146804] [2022-11-19 07:07:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:42,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:42,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:07:42,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:07:42,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-19 07:07:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:42,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:07:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,935 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-19 07:07:42,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-19 07:07:42,957 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 42 treesize of output 38 [2022-11-19 07:07:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:43,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:43,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [157146804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:43,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:07:43,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:07:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140672793] [2022-11-19 07:07:43,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:43,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:43,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:07:43,068 INFO L87 Difference]: Start difference. First operand 328 states and 945 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:43,171 INFO L93 Difference]: Finished difference Result 327 states and 942 transitions. [2022-11-19 07:07:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:43,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:07:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:43,173 INFO L225 Difference]: With dead ends: 327 [2022-11-19 07:07:43,174 INFO L226 Difference]: Without dead ends: 327 [2022-11-19 07:07:43,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:07:43,174 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:43,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-19 07:07:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-19 07:07:43,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2022-11-19 07:07:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 276 states have (on average 3.4130434782608696) internal successors, (942), 326 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 942 transitions. [2022-11-19 07:07:43,188 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 942 transitions. Word has length 5 [2022-11-19 07:07:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:43,188 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 942 transitions. [2022-11-19 07:07:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 942 transitions. [2022-11-19 07:07:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:07:43,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:43,189 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:07:43,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:43,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:43,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:43,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1085155263, now seen corresponding path program 2 times [2022-11-19 07:07:43,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:43,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053031242] [2022-11-19 07:07:43,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:07:43,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:43,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:43,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:43,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:07:43,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:07:43,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:07:43,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:07:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:43,840 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:43,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:44,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:44,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:44,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053031242] [2022-11-19 07:07:44,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053031242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:44,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815944884] [2022-11-19 07:07:44,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:07:44,789 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:44,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:07:44,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:07:44,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-19 07:07:45,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:07:45,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:07:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:07:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:45,130 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:45,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:45,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:46,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815944884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:46,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481906127] [2022-11-19 07:07:46,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:07:46,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:46,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:46,235 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:46,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:07:46,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:07:46,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:07:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:07:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:46,521 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:46,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:46,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:46,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481906127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:46,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:07:46,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 07:07:46,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106270695] [2022-11-19 07:07:46,803 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:07:46,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:07:46,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:07:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:07:46,804 INFO L87 Difference]: Start difference. First operand 327 states and 942 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:51,795 INFO L93 Difference]: Finished difference Result 2573 states and 7471 transitions. [2022-11-19 07:07:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:07:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:07:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:51,812 INFO L225 Difference]: With dead ends: 2573 [2022-11-19 07:07:51,812 INFO L226 Difference]: Without dead ends: 2573 [2022-11-19 07:07:51,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:07:51,813 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1189 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:51,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 48 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 07:07:51,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2022-11-19 07:07:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 333. [2022-11-19 07:07:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 282 states have (on average 3.382978723404255) internal successors, (954), 332 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 954 transitions. [2022-11-19 07:07:51,845 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 954 transitions. Word has length 6 [2022-11-19 07:07:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:51,845 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 954 transitions. [2022-11-19 07:07:51,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 954 transitions. [2022-11-19 07:07:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:07:51,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:51,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:07:51,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:52,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:52,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:52,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:52,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1084754952, now seen corresponding path program 1 times [2022-11-19 07:07:52,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243925463] [2022-11-19 07:07:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:52,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:52,462 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:52,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-19 07:07:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:52,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:07:52,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:52,638 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:07:52,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 07:07:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:52,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:52,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:52,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243925463] [2022-11-19 07:07:52,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243925463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:52,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:52,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:07:52,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047523517] [2022-11-19 07:07:52,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:52,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:07:52,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:52,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:07:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:07:52,672 INFO L87 Difference]: Start difference. First operand 333 states and 954 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) [2022-11-19 07:07:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:52,839 INFO L93 Difference]: Finished difference Result 231 states and 646 transitions. [2022-11-19 07:07:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:07:52,840 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 [2022-11-19 07:07:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:52,842 INFO L225 Difference]: With dead ends: 231 [2022-11-19 07:07:52,842 INFO L226 Difference]: Without dead ends: 231 [2022-11-19 07:07:52,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:07:52,843 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:52,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 2 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:07:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-19 07:07:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-19 07:07:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 204 states have (on average 3.1666666666666665) internal successors, (646), 230 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 646 transitions. [2022-11-19 07:07:52,851 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 646 transitions. Word has length 6 [2022-11-19 07:07:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:52,851 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 646 transitions. [2022-11-19 07:07:52,852 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) [2022-11-19 07:07:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 646 transitions. [2022-11-19 07:07:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:07:52,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:52,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:07:52,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-19 07:07:53,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:53,065 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1084754951, now seen corresponding path program 1 times [2022-11-19 07:07:53,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960965958] [2022-11-19 07:07:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:53,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:53,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:53,067 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:53,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 07:07:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:07:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:53,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:53,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:53,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960965958] [2022-11-19 07:07:53,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960965958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:53,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:53,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:07:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601260473] [2022-11-19 07:07:53,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:53,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:07:53,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:07:53,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:07:53,238 INFO L87 Difference]: Start difference. First operand 231 states and 646 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:53,553 INFO L93 Difference]: Finished difference Result 358 states and 994 transitions. [2022-11-19 07:07:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:07:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:07:53,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:53,556 INFO L225 Difference]: With dead ends: 358 [2022-11-19 07:07:53,557 INFO L226 Difference]: Without dead ends: 358 [2022-11-19 07:07:53,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:07:53,558 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 115 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:53,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 4 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:07:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-19 07:07:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 272. [2022-11-19 07:07:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 245 states have (on average 3.3142857142857145) internal successors, (812), 271 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 812 transitions. [2022-11-19 07:07:53,576 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 812 transitions. Word has length 6 [2022-11-19 07:07:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:53,576 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 812 transitions. [2022-11-19 07:07:53,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 812 transitions. [2022-11-19 07:07:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:07:53,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:53,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:07:53,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:53,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:53,789 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash 732339191, now seen corresponding path program 1 times [2022-11-19 07:07:53,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:53,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799304670] [2022-11-19 07:07:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:53,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:53,791 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:53,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 07:07:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:07:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:54,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:54,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799304670] [2022-11-19 07:07:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799304670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [115733599] [2022-11-19 07:07:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:07:54,125 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:07:54,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-19 07:07:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:07:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:54,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:54,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [115733599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:54,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141983773] [2022-11-19 07:07:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:54,427 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:54,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:07:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:07:54,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:54,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:54,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141983773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:54,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-19 07:07:54,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 13 [2022-11-19 07:07:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239656006] [2022-11-19 07:07:54,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:07:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:07:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:07:54,577 INFO L87 Difference]: Start difference. First operand 272 states and 812 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:54,856 INFO L93 Difference]: Finished difference Result 272 states and 770 transitions. [2022-11-19 07:07:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:07:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:07:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:54,859 INFO L225 Difference]: With dead ends: 272 [2022-11-19 07:07:54,859 INFO L226 Difference]: Without dead ends: 272 [2022-11-19 07:07:54,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:07:54,860 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:54,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 4 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:07:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-19 07:07:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-11-19 07:07:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 245 states have (on average 3.142857142857143) internal successors, (770), 271 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 770 transitions. [2022-11-19 07:07:54,870 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 770 transitions. Word has length 7 [2022-11-19 07:07:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:54,870 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 770 transitions. [2022-11-19 07:07:54,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 770 transitions. [2022-11-19 07:07:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:07:54,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:54,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:07:54,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-11-19 07:07:55,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:55,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:55,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:55,474 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash 732339780, now seen corresponding path program 1 times [2022-11-19 07:07:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:55,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277588629] [2022-11-19 07:07:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:55,475 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 [2022-11-19 07:07:55,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:55,476 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:55,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 07:07:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:07:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:55,687 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-19 07:07:55,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-19 07:07:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:55,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:55,721 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:55,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277588629] [2022-11-19 07:07:55,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277588629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:55,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:07:55,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:07:55,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415014529] [2022-11-19 07:07:55,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:55,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:55,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:07:55,723 INFO L87 Difference]: Start difference. First operand 272 states and 770 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) [2022-11-19 07:07:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:55,852 INFO L93 Difference]: Finished difference Result 261 states and 744 transitions. [2022-11-19 07:07:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:55,853 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 [2022-11-19 07:07:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:55,854 INFO L225 Difference]: With dead ends: 261 [2022-11-19 07:07:55,854 INFO L226 Difference]: Without dead ends: 261 [2022-11-19 07:07:55,855 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 [2022-11-19 07:07:55,855 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:55,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:07:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-19 07:07:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-11-19 07:07:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 238 states have (on average 3.1260504201680672) internal successors, (744), 260 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 744 transitions. [2022-11-19 07:07:55,864 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 744 transitions. Word has length 7 [2022-11-19 07:07:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:55,864 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 744 transitions. [2022-11-19 07:07:55,864 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) [2022-11-19 07:07:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 744 transitions. [2022-11-19 07:07:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:07:55,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:55,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:07:55,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:56,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:56,075 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash 732339781, now seen corresponding path program 1 times [2022-11-19 07:07:56,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:56,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305873144] [2022-11-19 07:07:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:56,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:56,077 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:56,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 07:07:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:56,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:07:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:56,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:56,365 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-19 07:07:56,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-19 07:07:56,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 07:07:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:56,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:57,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:57,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305873144] [2022-11-19 07:07:57,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305873144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:57,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526524877] [2022-11-19 07:07:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:07:57,007 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:07:57,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-19 07:07:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:07:57,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:57,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:57,379 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-19 07:07:57,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-19 07:07:57,396 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 39 treesize of output 37 [2022-11-19 07:07:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:57,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:07:57,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526524877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:07:57,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:07:57,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:07:57,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132906442] [2022-11-19 07:07:57,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:57,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:07:57,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:07:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:07:57,542 INFO L87 Difference]: Start difference. First operand 261 states and 744 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) [2022-11-19 07:07:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:57,624 INFO L93 Difference]: Finished difference Result 260 states and 740 transitions. [2022-11-19 07:07:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:07:57,625 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 [2022-11-19 07:07:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:57,627 INFO L225 Difference]: With dead ends: 260 [2022-11-19 07:07:57,627 INFO L226 Difference]: Without dead ends: 260 [2022-11-19 07:07:57,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:07:57,628 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 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, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:57,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-19 07:07:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-19 07:07:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-11-19 07:07:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 237 states have (on average 3.1223628691983123) internal successors, (740), 259 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 740 transitions. [2022-11-19 07:07:57,638 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 740 transitions. Word has length 7 [2022-11-19 07:07:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:57,639 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 740 transitions. [2022-11-19 07:07:57,639 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) [2022-11-19 07:07:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 740 transitions. [2022-11-19 07:07:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:07:57,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:57,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:07:57,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:57,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:58,044 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:07:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash 732339644, now seen corresponding path program 1 times [2022-11-19 07:07:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:07:58,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997429730] [2022-11-19 07:07:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:07:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:07:58,046 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:07:58,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-19 07:07:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:58,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:07:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:58,296 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:07:58,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:07:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:58,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:07:58,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:07:58,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997429730] [2022-11-19 07:07:58,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997429730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [126283360] [2022-11-19 07:07:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:58,876 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:07:58,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:07:58,877 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:07:58,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-19 07:07:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:07:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:59,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:59,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [126283360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682046559] [2022-11-19 07:07:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:59,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:59,537 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:59,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:07:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:07:59,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:59,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:59,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682046559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:59,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:07:59,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-19 07:07:59,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375978336] [2022-11-19 07:07:59,740 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:07:59,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:07:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:07:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:07:59,741 INFO L87 Difference]: Start difference. First operand 260 states and 740 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:03,248 INFO L93 Difference]: Finished difference Result 667 states and 1957 transitions. [2022-11-19 07:08:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:08:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:08:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:03,254 INFO L225 Difference]: With dead ends: 667 [2022-11-19 07:08:03,254 INFO L226 Difference]: Without dead ends: 667 [2022-11-19 07:08:03,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:08:03,255 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 694 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:03,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 29 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-19 07:08:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-19 07:08:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 513. [2022-11-19 07:08:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 490 states have (on average 3.336734693877551) internal successors, (1635), 512 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1635 transitions. [2022-11-19 07:08:03,273 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1635 transitions. Word has length 7 [2022-11-19 07:08:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:03,274 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 1635 transitions. [2022-11-19 07:08:03,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:03,274 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1635 transitions. [2022-11-19 07:08:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:08:03,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:03,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:03,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-19 07:08:03,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:03,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:03,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:03,883 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:03,884 INFO L85 PathProgramCache]: Analyzing trace with hash 732504490, now seen corresponding path program 1 times [2022-11-19 07:08:03,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:03,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134411871] [2022-11-19 07:08:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:03,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:03,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:03,885 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:03,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-19 07:08:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:08:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:04,129 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-19 07:08:04,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-19 07:08:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:04,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:04,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134411871] [2022-11-19 07:08:04,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134411871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:04,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:08:04,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:08:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816673402] [2022-11-19 07:08:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:08:04,163 INFO L87 Difference]: Start difference. First operand 513 states and 1635 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) [2022-11-19 07:08:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:04,297 INFO L93 Difference]: Finished difference Result 467 states and 1488 transitions. [2022-11-19 07:08:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:04,298 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 [2022-11-19 07:08:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:04,300 INFO L225 Difference]: With dead ends: 467 [2022-11-19 07:08:04,300 INFO L226 Difference]: Without dead ends: 467 [2022-11-19 07:08:04,300 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 [2022-11-19 07:08:04,301 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:04,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:08:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-11-19 07:08:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2022-11-19 07:08:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 449 states have (on average 3.314031180400891) internal successors, (1488), 466 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1488 transitions. [2022-11-19 07:08:04,315 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1488 transitions. Word has length 7 [2022-11-19 07:08:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:04,316 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 1488 transitions. [2022-11-19 07:08:04,316 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) [2022-11-19 07:08:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1488 transitions. [2022-11-19 07:08:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:08:04,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:04,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:04,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:04,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:04,529 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:04,530 INFO L85 PathProgramCache]: Analyzing trace with hash 732504491, now seen corresponding path program 1 times [2022-11-19 07:08:04,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:04,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5568825] [2022-11-19 07:08:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:04,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:04,532 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 07:08:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:08:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:04,837 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:04,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:05,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:05,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:05,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5568825] [2022-11-19 07:08:05,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5568825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641729878] [2022-11-19 07:08:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:05,354 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:05,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:05,359 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:05,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 07:08:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:05,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:08:05,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:05,737 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:08:05,737 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 15 treesize of output 38 [2022-11-19 07:08:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:05,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:05,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [641729878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:05,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:08:05,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:08:05,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247015517] [2022-11-19 07:08:05,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:05,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:05,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:05,857 INFO L87 Difference]: Start difference. First operand 467 states and 1488 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) [2022-11-19 07:08:05,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:05,921 INFO L93 Difference]: Finished difference Result 467 states and 1496 transitions. [2022-11-19 07:08:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:05,922 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 [2022-11-19 07:08:05,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:05,924 INFO L225 Difference]: With dead ends: 467 [2022-11-19 07:08:05,924 INFO L226 Difference]: Without dead ends: 467 [2022-11-19 07:08:05,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:05,925 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:05,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-19 07:08:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-11-19 07:08:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2022-11-19 07:08:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 449 states have (on average 3.33184855233853) internal successors, (1496), 466 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1496 transitions. [2022-11-19 07:08:05,938 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1496 transitions. Word has length 7 [2022-11-19 07:08:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:05,939 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 1496 transitions. [2022-11-19 07:08:05,939 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) [2022-11-19 07:08:05,939 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1496 transitions. [2022-11-19 07:08:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:08:05,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:05,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:05,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-19 07:08:06,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-19 07:08:06,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:06,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1227696789, now seen corresponding path program 1 times [2022-11-19 07:08:06,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:06,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458829166] [2022-11-19 07:08:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:06,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:06,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:06,354 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:06,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-19 07:08:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:08:06,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:06,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:06,632 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-19 07:08:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-19 07:08:06,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 07:08:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:06,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:07,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:07,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458829166] [2022-11-19 07:08:07,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458829166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349513892] [2022-11-19 07:08:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:07,193 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:07,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-19 07:08:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:08:07,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:07,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:07,569 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-19 07:08:07,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-19 07:08:07,586 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 42 treesize of output 38 [2022-11-19 07:08:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:08:07,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:07,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349513892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:07,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:08:07,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:08:07,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576946722] [2022-11-19 07:08:07,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:07,738 INFO L87 Difference]: Start difference. First operand 467 states and 1496 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) [2022-11-19 07:08:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:07,828 INFO L93 Difference]: Finished difference Result 466 states and 1495 transitions. [2022-11-19 07:08:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:07,828 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 8 [2022-11-19 07:08:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:07,831 INFO L225 Difference]: With dead ends: 466 [2022-11-19 07:08:07,831 INFO L226 Difference]: Without dead ends: 466 [2022-11-19 07:08:07,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:07,832 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:07,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-19 07:08:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-19 07:08:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2022-11-19 07:08:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 449 states have (on average 3.329621380846325) internal successors, (1495), 465 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1495 transitions. [2022-11-19 07:08:07,846 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1495 transitions. Word has length 8 [2022-11-19 07:08:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:07,846 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 1495 transitions. [2022-11-19 07:08:07,847 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) [2022-11-19 07:08:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1495 transitions. [2022-11-19 07:08:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:08:07,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:07,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:07,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:08,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-19 07:08:08,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:08,264 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:08,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1232797949, now seen corresponding path program 1 times [2022-11-19 07:08:08,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:08,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057091333] [2022-11-19 07:08:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:08,266 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:08,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 07:08:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:08:08,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:08,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:08,452 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:08,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057091333] [2022-11-19 07:08:08,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057091333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:08,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:08:08,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:08:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296628283] [2022-11-19 07:08:08,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:08:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:08:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:08:08,455 INFO L87 Difference]: Start difference. First operand 466 states and 1495 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:08,748 INFO L93 Difference]: Finished difference Result 676 states and 2170 transitions. [2022-11-19 07:08:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:08:08,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:08:08,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:08,752 INFO L225 Difference]: With dead ends: 676 [2022-11-19 07:08:08,752 INFO L226 Difference]: Without dead ends: 676 [2022-11-19 07:08:08,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:08:08,752 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:08,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 4 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:08:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-19 07:08:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 563. [2022-11-19 07:08:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 546 states have (on average 3.5054945054945055) internal successors, (1914), 562 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1914 transitions. [2022-11-19 07:08:08,769 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1914 transitions. Word has length 8 [2022-11-19 07:08:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:08,770 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 1914 transitions. [2022-11-19 07:08:08,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1914 transitions. [2022-11-19 07:08:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:08:08,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:08,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:08,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:08,982 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash -596180098, now seen corresponding path program 1 times [2022-11-19 07:08:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:08,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730192452] [2022-11-19 07:08:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:08,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:08,985 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:09,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-19 07:08:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:08:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:09,306 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:09,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:09,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:09,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730192452] [2022-11-19 07:08:09,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730192452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [132047726] [2022-11-19 07:08:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:09,862 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:09,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:09,863 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:09,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-19 07:08:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:08:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:10,272 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:08:10,272 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 15 treesize of output 38 [2022-11-19 07:08:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:10,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:10,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [132047726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:10,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:08:10,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:08:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718613633] [2022-11-19 07:08:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:10,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:10,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:10,401 INFO L87 Difference]: Start difference. First operand 563 states and 1914 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:10,478 INFO L93 Difference]: Finished difference Result 553 states and 1869 transitions. [2022-11-19 07:08:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:08:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:10,482 INFO L225 Difference]: With dead ends: 553 [2022-11-19 07:08:10,482 INFO L226 Difference]: Without dead ends: 553 [2022-11-19 07:08:10,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:10,483 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 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, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:10,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-19 07:08:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-19 07:08:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2022-11-19 07:08:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 536 states have (on average 3.486940298507463) internal successors, (1869), 552 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1869 transitions. [2022-11-19 07:08:10,500 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1869 transitions. Word has length 9 [2022-11-19 07:08:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:10,500 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 1869 transitions. [2022-11-19 07:08:10,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1869 transitions. [2022-11-19 07:08:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:08:10,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:10,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:10,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:10,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-19 07:08:10,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:10,915 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:10,916 INFO L85 PathProgramCache]: Analyzing trace with hash -437804509, now seen corresponding path program 1 times [2022-11-19 07:08:10,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:10,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136688835] [2022-11-19 07:08:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:10,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:10,917 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:10,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 07:08:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:08:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:11,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:11,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:11,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136688835] [2022-11-19 07:08:11,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136688835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:11,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:08:11,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:08:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430308464] [2022-11-19 07:08:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:11,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:08:11,084 INFO L87 Difference]: Start difference. First operand 553 states and 1869 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:11,214 INFO L93 Difference]: Finished difference Result 443 states and 1432 transitions. [2022-11-19 07:08:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:11,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:08:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:11,219 INFO L225 Difference]: With dead ends: 443 [2022-11-19 07:08:11,219 INFO L226 Difference]: Without dead ends: 443 [2022-11-19 07:08:11,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:08:11,220 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:11,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:08:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-19 07:08:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-11-19 07:08:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 430 states have (on average 3.3302325581395347) internal successors, (1432), 442 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1432 transitions. [2022-11-19 07:08:11,232 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1432 transitions. Word has length 9 [2022-11-19 07:08:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:11,233 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 1432 transitions. [2022-11-19 07:08:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1432 transitions. [2022-11-19 07:08:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:08:11,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:11,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:11,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:11,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:11,446 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:11,447 INFO L85 PathProgramCache]: Analyzing trace with hash -437965894, now seen corresponding path program 1 times [2022-11-19 07:08:11,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:11,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926310590] [2022-11-19 07:08:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:11,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:11,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:11,449 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:11,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-19 07:08:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:11,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:08:11,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:11,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:11,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926310590] [2022-11-19 07:08:11,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926310590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908118413] [2022-11-19 07:08:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:11,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:11,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:11,803 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:11,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-19 07:08:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:12,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:08:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:12,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1908118413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082879383] [2022-11-19 07:08:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:12,163 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:12,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 07:08:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:08:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:12,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:12,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082879383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:12,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-19 07:08:12,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 13 [2022-11-19 07:08:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041078002] [2022-11-19 07:08:12,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:08:12,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:08:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:08:12,358 INFO L87 Difference]: Start difference. First operand 443 states and 1432 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:12,575 INFO L93 Difference]: Finished difference Result 443 states and 1358 transitions. [2022-11-19 07:08:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:08:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:08:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:12,578 INFO L225 Difference]: With dead ends: 443 [2022-11-19 07:08:12,578 INFO L226 Difference]: Without dead ends: 443 [2022-11-19 07:08:12,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:08:12,579 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:12,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 4 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:08:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-19 07:08:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-11-19 07:08:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 430 states have (on average 3.158139534883721) internal successors, (1358), 442 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1358 transitions. [2022-11-19 07:08:12,591 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1358 transitions. Word has length 9 [2022-11-19 07:08:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:12,591 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 1358 transitions. [2022-11-19 07:08:12,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1358 transitions. [2022-11-19 07:08:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:08:12,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:12,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:12,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:12,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:13,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:13,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:13,199 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash -437965295, now seen corresponding path program 1 times [2022-11-19 07:08:13,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:13,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762936229] [2022-11-19 07:08:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:13,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:13,202 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:13,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 07:08:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:08:13,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:13,455 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:13,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:13,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:14,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:14,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762936229] [2022-11-19 07:08:14,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762936229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:14,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368523064] [2022-11-19 07:08:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:14,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:14,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:14,060 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:14,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-19 07:08:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:14,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:08:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:14,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:14,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368523064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:14,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990707704] [2022-11-19 07:08:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:14,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:14,759 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:14,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 07:08:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:08:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:14,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:15,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990707704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:15,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:08:15,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-19 07:08:15,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250722167] [2022-11-19 07:08:15,010 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:08:15,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:08:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:08:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:08:15,011 INFO L87 Difference]: Start difference. First operand 443 states and 1358 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:18,478 INFO L93 Difference]: Finished difference Result 740 states and 2341 transitions. [2022-11-19 07:08:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:08:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:08:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:18,484 INFO L225 Difference]: With dead ends: 740 [2022-11-19 07:08:18,484 INFO L226 Difference]: Without dead ends: 740 [2022-11-19 07:08:18,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:08:18,485 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 584 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:18,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 37 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-19 07:08:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-19 07:08:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 649. [2022-11-19 07:08:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 636 states have (on average 3.397798742138365) internal successors, (2161), 648 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2161 transitions. [2022-11-19 07:08:18,504 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2161 transitions. Word has length 9 [2022-11-19 07:08:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:18,504 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 2161 transitions. [2022-11-19 07:08:18,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2161 transitions. [2022-11-19 07:08:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:08:18,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:18,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:18,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-19 07:08:18,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-19 07:08:18,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-19 07:08:19,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:19,112 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -437965181, now seen corresponding path program 1 times [2022-11-19 07:08:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:19,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318730984] [2022-11-19 07:08:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:19,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:19,114 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:19,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 07:08:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:08:19,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:19,458 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:19,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:19,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:19,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:19,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318730984] [2022-11-19 07:08:19,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318730984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:19,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [49506020] [2022-11-19 07:08:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:19,950 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:19,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:19,952 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:19,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-19 07:08:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:20,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:08:20,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:20,411 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:08:20,412 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 15 treesize of output 38 [2022-11-19 07:08:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:20,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [49506020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:20,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:08:20,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:08:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394176169] [2022-11-19 07:08:20,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:20,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:20,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:20,544 INFO L87 Difference]: Start difference. First operand 649 states and 2161 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:20,612 INFO L93 Difference]: Finished difference Result 639 states and 2121 transitions. [2022-11-19 07:08:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:20,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:08:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:20,615 INFO L225 Difference]: With dead ends: 639 [2022-11-19 07:08:20,616 INFO L226 Difference]: Without dead ends: 639 [2022-11-19 07:08:20,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:20,616 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:20,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-19 07:08:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-19 07:08:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2022-11-19 07:08:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 626 states have (on average 3.3881789137380194) internal successors, (2121), 638 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2121 transitions. [2022-11-19 07:08:20,633 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2121 transitions. Word has length 9 [2022-11-19 07:08:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:20,633 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 2121 transitions. [2022-11-19 07:08:20,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2121 transitions. [2022-11-19 07:08:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:08:20,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:20,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:20,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:20,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-19 07:08:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:21,038 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1301598686, now seen corresponding path program 1 times [2022-11-19 07:08:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:21,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500138157] [2022-11-19 07:08:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:21,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:21,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:21,040 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:21,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-19 07:08:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:08:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:21,382 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:21,382 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:21,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:21,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:21,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500138157] [2022-11-19 07:08:21,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500138157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:21,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [668788026] [2022-11-19 07:08:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:21,903 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:21,904 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:21,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-19 07:08:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:22,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:08:22,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:22,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:22,310 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:08:22,310 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 15 treesize of output 38 [2022-11-19 07:08:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:08:22,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:22,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [668788026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:22,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:08:22,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:08:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034801612] [2022-11-19 07:08:22,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:22,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:22,451 INFO L87 Difference]: Start difference. First operand 639 states and 2121 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:22,523 INFO L93 Difference]: Finished difference Result 635 states and 2113 transitions. [2022-11-19 07:08:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:22,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:08:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:22,527 INFO L225 Difference]: With dead ends: 635 [2022-11-19 07:08:22,528 INFO L226 Difference]: Without dead ends: 635 [2022-11-19 07:08:22,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:22,528 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:22,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-19 07:08:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-11-19 07:08:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2022-11-19 07:08:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 622 states have (on average 3.397106109324759) internal successors, (2113), 634 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2113 transitions. [2022-11-19 07:08:22,545 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2113 transitions. Word has length 10 [2022-11-19 07:08:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:22,545 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 2113 transitions. [2022-11-19 07:08:22,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2113 transitions. [2022-11-19 07:08:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:08:22,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:22,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:22,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:22,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-19 07:08:22,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:22,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash -692018906, now seen corresponding path program 1 times [2022-11-19 07:08:22,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:22,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072880249] [2022-11-19 07:08:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:22,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:22,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:22,961 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:22,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 07:08:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:08:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:23,288 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:23,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:23,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:23,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072880249] [2022-11-19 07:08:23,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072880249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1347734094] [2022-11-19 07:08:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:23,819 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:23,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:23,820 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:23,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-19 07:08:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:24,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:08:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:24,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:24,284 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:08:24,284 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 15 treesize of output 38 [2022-11-19 07:08:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:08:24,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:24,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1347734094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:24,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:08:24,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:08:24,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523775997] [2022-11-19 07:08:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:24,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:24,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:24,451 INFO L87 Difference]: Start difference. First operand 635 states and 2113 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:24,536 INFO L93 Difference]: Finished difference Result 631 states and 2105 transitions. [2022-11-19 07:08:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:24,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:08:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:24,540 INFO L225 Difference]: With dead ends: 631 [2022-11-19 07:08:24,540 INFO L226 Difference]: Without dead ends: 631 [2022-11-19 07:08:24,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:24,541 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:24,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-19 07:08:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-19 07:08:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2022-11-19 07:08:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 618 states have (on average 3.4061488673139158) internal successors, (2105), 630 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2105 transitions. [2022-11-19 07:08:24,557 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2105 transitions. Word has length 10 [2022-11-19 07:08:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:24,557 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 2105 transitions. [2022-11-19 07:08:24,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2105 transitions. [2022-11-19 07:08:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:08:24,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:24,559 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-19 07:08:24,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:24,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:24,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:24,976 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash 471662083, now seen corresponding path program 2 times [2022-11-19 07:08:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:24,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100065542] [2022-11-19 07:08:24,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:08:24,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:24,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:24,978 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:24,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-19 07:08:25,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:08:25,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:08:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:08:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:25,287 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:25,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:25,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:27,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100065542] [2022-11-19 07:08:27,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100065542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377321563] [2022-11-19 07:08:27,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:08:27,269 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:27,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:27,270 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:27,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-19 07:08:27,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:08:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:08:27,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:08:27,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:28,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:29,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [377321563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964457862] [2022-11-19 07:08:29,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:08:29,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:29,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:29,283 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:29,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-19 07:08:29,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:08:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:08:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:08:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:29,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:29,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964457862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:29,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:08:29,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 34 [2022-11-19 07:08:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782345399] [2022-11-19 07:08:29,980 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:08:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:08:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:08:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:08:29,982 INFO L87 Difference]: Start difference. First operand 631 states and 2105 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:57,226 INFO L93 Difference]: Finished difference Result 2091 states and 6803 transitions. [2022-11-19 07:08:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:08:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:08:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:57,240 INFO L225 Difference]: With dead ends: 2091 [2022-11-19 07:08:57,240 INFO L226 Difference]: Without dead ends: 2091 [2022-11-19 07:08:57,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=554, Invalid=3478, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:08:57,242 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 509 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 2984 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:57,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 250 Invalid, 3438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2984 Invalid, 0 Unknown, 429 Unchecked, 16.4s Time] [2022-11-19 07:08:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-11-19 07:08:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 688. [2022-11-19 07:08:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 675 states have (on average 3.3985185185185185) internal successors, (2294), 687 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2294 transitions. [2022-11-19 07:08:57,278 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2294 transitions. Word has length 11 [2022-11-19 07:08:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:57,278 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 2294 transitions. [2022-11-19 07:08:57,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2294 transitions. [2022-11-19 07:08:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:08:57,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:57,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:57,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-19 07:08:57,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-19 07:08:57,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-19 07:08:57,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:57,892 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1698568298, now seen corresponding path program 1 times [2022-11-19 07:08:57,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:57,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315222017] [2022-11-19 07:08:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:57,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:57,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:57,894 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:57,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-19 07:08:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:58,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:08:58,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:58,228 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:08:58,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:08:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:58,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:58,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:58,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315222017] [2022-11-19 07:08:58,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315222017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [827382865] [2022-11-19 07:08:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:58,787 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:58,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:58,788 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:58,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-19 07:08:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:08:59,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:59,229 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:08:59,230 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 15 treesize of output 38 [2022-11-19 07:08:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:08:59,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:08:59,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [827382865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:08:59,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:08:59,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:08:59,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176169256] [2022-11-19 07:08:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:59,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:08:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:08:59,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:59,368 INFO L87 Difference]: Start difference. First operand 688 states and 2294 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-19 07:08:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:59,427 INFO L93 Difference]: Finished difference Result 667 states and 2186 transitions. [2022-11-19 07:08:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:08:59,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:08:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:59,430 INFO L225 Difference]: With dead ends: 667 [2022-11-19 07:08:59,430 INFO L226 Difference]: Without dead ends: 667 [2022-11-19 07:08:59,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:08:59,431 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:59,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-19 07:08:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-19 07:08:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2022-11-19 07:08:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 654 states have (on average 3.3425076452599387) internal successors, (2186), 666 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2186 transitions. [2022-11-19 07:08:59,455 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2186 transitions. Word has length 11 [2022-11-19 07:08:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:59,455 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 2186 transitions. [2022-11-19 07:08:59,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-19 07:08:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2186 transitions. [2022-11-19 07:08:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:08:59,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:59,456 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 07:08:59,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:59,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-19 07:08:59,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:59,869 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:08:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash -838581247, now seen corresponding path program 3 times [2022-11-19 07:08:59,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:59,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194541247] [2022-11-19 07:08:59,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:08:59,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:59,871 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:59,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-19 07:09:00,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:09:00,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:09:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:09:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:00,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:09:00,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:09:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:00,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:03,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:09:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194541247] [2022-11-19 07:09:03,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194541247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793116841] [2022-11-19 07:09:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:09:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:09:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:09:03,856 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:09:03,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-19 07:09:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:09:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:09:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:09:04,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:04,842 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:09:04,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:09:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:05,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:08,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793116841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:08,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627229768] [2022-11-19 07:09:08,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:09:08,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:09:08,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:09:08,479 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:09:08,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-19 07:09:10,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:09:10,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:09:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:09:10,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:10,413 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:09:10,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:09:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:10,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:15,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627229768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:15,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:09:15,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-19 07:09:15,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322115740] [2022-11-19 07:09:15,616 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:09:15,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 07:09:15,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:09:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 07:09:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:09:15,618 INFO L87 Difference]: Start difference. First operand 667 states and 2186 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) [2022-11-19 07:09:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:41,414 INFO L93 Difference]: Finished difference Result 9371 states and 32700 transitions. [2022-11-19 07:09:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:09:41,416 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 [2022-11-19 07:09:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:41,455 INFO L225 Difference]: With dead ends: 9371 [2022-11-19 07:09:41,455 INFO L226 Difference]: Without dead ends: 9371 [2022-11-19 07:09:41,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=841, Invalid=2021, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:09:41,457 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4832 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 3228 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4832 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 3259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:09:41,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4832 Valid, 258 Invalid, 3259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3228 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2022-11-19 07:09:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9371 states. [2022-11-19 07:09:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9371 to 679. [2022-11-19 07:09:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 666 states have (on average 3.3183183183183185) internal successors, (2210), 678 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:09:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2210 transitions. [2022-11-19 07:09:41,594 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2210 transitions. Word has length 12 [2022-11-19 07:09:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:09:41,594 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 2210 transitions. [2022-11-19 07:09:41,595 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) [2022-11-19 07:09:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2210 transitions. [2022-11-19 07:09:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:09:41,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:09:41,596 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:09:41,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-19 07:09:41,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-19 07:09:42,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-19 07:09:42,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:09:42,211 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:09:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:09:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1650739989, now seen corresponding path program 1 times [2022-11-19 07:09:42,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:09:42,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968856671] [2022-11-19 07:09:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:42,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:09:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:09:42,213 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:09:42,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-19 07:09:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:09:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:42,537 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:09:42,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:09:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:42,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:44,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:09:44,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968856671] [2022-11-19 07:09:44,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968856671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1425886322] [2022-11-19 07:09:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:09:44,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:09:44,657 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:09:44,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-19 07:09:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:44,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:09:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:09:45,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:09:46,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1425886322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:46,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148521768] [2022-11-19 07:09:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:46,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:09:46,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:09:46,705 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:09:46,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-19 07:09:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:09:46,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:09:47,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:09:47,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148521768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:47,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:09:47,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-19 07:09:47,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880619668] [2022-11-19 07:09:47,410 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:09:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:09:47,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:09:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:09:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:09:47,412 INFO L87 Difference]: Start difference. First operand 679 states and 2210 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:17,195 INFO L93 Difference]: Finished difference Result 2410 states and 7991 transitions. [2022-11-19 07:10:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:10:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:10:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:17,206 INFO L225 Difference]: With dead ends: 2410 [2022-11-19 07:10:17,206 INFO L226 Difference]: Without dead ends: 2410 [2022-11-19 07:10:17,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=516, Invalid=3390, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 07:10:17,208 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 922 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 2925 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 3530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:17,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 253 Invalid, 3530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2925 Invalid, 0 Unknown, 584 Unchecked, 15.7s Time] [2022-11-19 07:10:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2022-11-19 07:10:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 889. [2022-11-19 07:10:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 876 states have (on average 3.434931506849315) internal successors, (3009), 888 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3009 transitions. [2022-11-19 07:10:17,259 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3009 transitions. Word has length 12 [2022-11-19 07:10:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:17,259 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 3009 transitions. [2022-11-19 07:10:17,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3009 transitions. [2022-11-19 07:10:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:10:17,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:17,262 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:17,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-19 07:10:17,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-19 07:10:17,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-19 07:10:17,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:17,878 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:10:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1806165387, now seen corresponding path program 2 times [2022-11-19 07:10:17,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:10:17,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478112826] [2022-11-19 07:10:17,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:10:17,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:10:17,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:10:17,880 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:10:17,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-19 07:10:18,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:10:18,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:18,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:10:18,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:18,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:10:18,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:10:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:18,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:20,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:10:20,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478112826] [2022-11-19 07:10:20,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478112826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:20,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693481039] [2022-11-19 07:10:20,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:10:20,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:20,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:10:20,297 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:10:20,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-19 07:10:20,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:10:20,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:10:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:21,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:22,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1693481039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320268898] [2022-11-19 07:10:22,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:10:22,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:22,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:22,429 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-19 07:10:22,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:10:22,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:10:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:22,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320268898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:23,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:10:23,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 34 [2022-11-19 07:10:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015549882] [2022-11-19 07:10:23,241 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:10:23,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:10:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:10:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:10:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:10:23,242 INFO L87 Difference]: Start difference. First operand 889 states and 3009 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:32,631 INFO L93 Difference]: Finished difference Result 1408 states and 4446 transitions. [2022-11-19 07:10:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:10:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:10:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:32,636 INFO L225 Difference]: With dead ends: 1408 [2022-11-19 07:10:32,636 INFO L226 Difference]: Without dead ends: 1408 [2022-11-19 07:10:32,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:10:32,638 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 392 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:32,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 164 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1474 Invalid, 0 Unknown, 238 Unchecked, 5.8s Time] [2022-11-19 07:10:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-11-19 07:10:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 892. [2022-11-19 07:10:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 879 states have (on average 3.4311717861205917) internal successors, (3016), 891 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3016 transitions. [2022-11-19 07:10:32,665 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3016 transitions. Word has length 12 [2022-11-19 07:10:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:32,665 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 3016 transitions. [2022-11-19 07:10:32,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3016 transitions. [2022-11-19 07:10:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:10:32,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:32,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:32,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-19 07:10:32,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-19 07:10:33,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-19 07:10:33,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:33,272 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:10:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1000998598, now seen corresponding path program 1 times [2022-11-19 07:10:33,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:10:33,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143510391] [2022-11-19 07:10:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:33,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:10:33,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:10:33,274 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:10:33,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-19 07:10:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:10:33,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:33,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:10:33,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:10:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:34,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:34,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:10:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143510391] [2022-11-19 07:10:34,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143510391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [750674399] [2022-11-19 07:10:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:34,690 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:34,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:10:34,691 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:10:34,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-19 07:10:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:10:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:35,219 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:10:35,219 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 15 treesize of output 38 [2022-11-19 07:10:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:10:35,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:10:35,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [750674399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:35,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:10:35,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 07:10:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654867885] [2022-11-19 07:10:35,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:35,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:10:35,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:35,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:10:35,420 INFO L87 Difference]: Start difference. First operand 892 states and 3016 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:35,479 INFO L93 Difference]: Finished difference Result 887 states and 3001 transitions. [2022-11-19 07:10:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:35,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 12 [2022-11-19 07:10:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:35,482 INFO L225 Difference]: With dead ends: 887 [2022-11-19 07:10:35,482 INFO L226 Difference]: Without dead ends: 887 [2022-11-19 07:10:35,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:10:35,483 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:35,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-19 07:10:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-19 07:10:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2022-11-19 07:10:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 874 states have (on average 3.433638443935927) internal successors, (3001), 886 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3001 transitions. [2022-11-19 07:10:35,497 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3001 transitions. Word has length 12 [2022-11-19 07:10:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 3001 transitions. [2022-11-19 07:10:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3001 transitions. [2022-11-19 07:10:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:10:35,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:35,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:35,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-19 07:10:35,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-19 07:10:35,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:10:35,903 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:10:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1116009869, now seen corresponding path program 1 times [2022-11-19 07:10:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:10:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268594943] [2022-11-19 07:10:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:35,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:10:35,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:10:35,905 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:10:35,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-19 07:10:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:36,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:10:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:36,266 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:10:36,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:10:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:36,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:10:37,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:10:37,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268594943] [2022-11-19 07:10:37,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268594943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:37,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [497970075] [2022-11-19 07:10:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:37,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:37,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:10:37,280 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:10:37,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-19 07:10:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:10:37,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:37,809 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:10:37,809 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 15 treesize of output 38 [2022-11-19 07:10:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:10:38,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:10:38,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [497970075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:38,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:10:38,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 07:10:38,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090002258] [2022-11-19 07:10:38,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:38,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:38,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:10:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:10:38,019 INFO L87 Difference]: Start difference. First operand 887 states and 3001 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:38,082 INFO L93 Difference]: Finished difference Result 881 states and 2981 transitions. [2022-11-19 07:10:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 12 [2022-11-19 07:10:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:38,084 INFO L225 Difference]: With dead ends: 881 [2022-11-19 07:10:38,084 INFO L226 Difference]: Without dead ends: 881 [2022-11-19 07:10:38,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:10:38,085 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:38,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-19 07:10:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-19 07:10:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 880. [2022-11-19 07:10:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 867 states have (on average 3.43598615916955) internal successors, (2979), 879 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2979 transitions. [2022-11-19 07:10:38,104 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2979 transitions. Word has length 12 [2022-11-19 07:10:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:38,104 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 2979 transitions. [2022-11-19 07:10:38,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2979 transitions. [2022-11-19 07:10:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:10:38,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:38,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-19 07:10:38,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-19 07:10:38,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-19 07:10:38,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:38,511 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:10:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:38,511 INFO L85 PathProgramCache]: Analyzing trace with hash 133954755, now seen corresponding path program 3 times [2022-11-19 07:10:38,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:10:38,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764276137] [2022-11-19 07:10:38,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:10:38,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:10:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:10:38,512 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:10:38,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-19 07:10:38,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:10:38,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:38,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:10:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:38,920 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:10:38,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:10:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:10:39,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:10:40,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:10:40,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764276137] [2022-11-19 07:10:40,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764276137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1279663531] [2022-11-19 07:10:40,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:10:40,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:40,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:10:40,475 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:10:40,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-19 07:10:41,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:10:41,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:41,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:10:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:41,155 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:10:41,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:10:42,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 07:10:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:42,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:44,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1279663531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331283747] [2022-11-19 07:10:44,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:10:44,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:44,890 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:44,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-19 07:10:45,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:10:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:10:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:46,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:48,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331283747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:48,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:10:48,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 56 [2022-11-19 07:10:48,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510718055] [2022-11-19 07:10:48,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:10:48,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-19 07:10:48,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:10:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-19 07:10:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:10:48,489 INFO L87 Difference]: Start difference. First operand 880 states and 2979 transitions. Second operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:28,350 INFO L93 Difference]: Finished difference Result 3841 states and 11718 transitions. [2022-11-19 07:11:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-19 07:11:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:11:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:28,359 INFO L225 Difference]: With dead ends: 3841 [2022-11-19 07:11:28,359 INFO L226 Difference]: Without dead ends: 3841 [2022-11-19 07:11:28,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3646 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=2306, Invalid=10126, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 07:11:28,362 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5491 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 7983 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5491 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 8132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 7983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:28,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5491 Valid, 640 Invalid, 8132 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [149 Valid, 7983 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2022-11-19 07:11:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2022-11-19 07:11:28,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 1497. [2022-11-19 07:11:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1484 states have (on average 3.6266846361185983) internal successors, (5382), 1496 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5382 transitions. [2022-11-19 07:11:28,419 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5382 transitions. Word has length 13 [2022-11-19 07:11:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:28,419 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 5382 transitions. [2022-11-19 07:11:28,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5382 transitions. [2022-11-19 07:11:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:11:28,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:28,421 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:28,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:28,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-19 07:11:28,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-19 07:11:29,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:29,022 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:11:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1302834375, now seen corresponding path program 2 times [2022-11-19 07:11:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:29,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107444698] [2022-11-19 07:11:29,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:11:29,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:29,024 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:11:29,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-19 07:11:29,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:11:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:11:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:29,409 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:11:29,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:11:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:29,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:31,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:31,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107444698] [2022-11-19 07:11:31,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107444698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:31,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [281977043] [2022-11-19 07:11:31,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:11:31,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:31,451 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:31,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-19 07:11:31,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:11:31,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:31,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:11:31,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:32,024 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:11:32,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:11:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:32,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:33,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [281977043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753903435] [2022-11-19 07:11:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:11:33,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:33,791 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:33,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-19 07:11:34,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:11:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:11:34,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:11:34,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:34,177 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:11:34,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:11:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:34,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:34,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753903435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:34,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:11:34,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 32 [2022-11-19 07:11:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126395440] [2022-11-19 07:11:34,746 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:34,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:11:34,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:11:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:11:34,747 INFO L87 Difference]: Start difference. First operand 1497 states and 5382 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:44,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:44,468 INFO L93 Difference]: Finished difference Result 2087 states and 7250 transitions. [2022-11-19 07:11:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:11:44,469 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:11:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:44,483 INFO L225 Difference]: With dead ends: 2087 [2022-11-19 07:11:44,483 INFO L226 Difference]: Without dead ends: 2087 [2022-11-19 07:11:44,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:11:44,484 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 374 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:44,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 153 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 389 Invalid, 0 Unknown, 171 Unchecked, 2.8s Time] [2022-11-19 07:11:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2022-11-19 07:11:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1507. [2022-11-19 07:11:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1494 states have (on average 3.6251673360107093) internal successors, (5416), 1506 states have internal predecessors, (5416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5416 transitions. [2022-11-19 07:11:44,524 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5416 transitions. Word has length 13 [2022-11-19 07:11:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:44,524 INFO L495 AbstractCegarLoop]: Abstraction has 1507 states and 5416 transitions. [2022-11-19 07:11:44,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5416 transitions. [2022-11-19 07:11:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:11:44,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:44,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:44,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-19 07:11:44,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:44,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-11-19 07:11:45,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:45,127 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:11:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -966185649, now seen corresponding path program 1 times [2022-11-19 07:11:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098052635] [2022-11-19 07:11:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:45,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:45,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:45,129 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:11:45,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-19 07:11:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:11:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:45,523 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:11:45,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:11:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:45,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:46,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:46,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098052635] [2022-11-19 07:11:46,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098052635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:46,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608520839] [2022-11-19 07:11:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:46,556 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:46,557 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-19 07:11:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:46,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:11:46,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:11:47,092 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:11:47,092 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 15 treesize of output 38 [2022-11-19 07:11:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:11:47,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:47,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1608520839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:47,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:11:47,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 07:11:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979292917] [2022-11-19 07:11:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:47,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:47,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:47,279 INFO L87 Difference]: Start difference. First operand 1507 states and 5416 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:47,347 INFO L93 Difference]: Finished difference Result 1506 states and 5415 transitions. [2022-11-19 07:11:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:11:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:47,351 INFO L225 Difference]: With dead ends: 1506 [2022-11-19 07:11:47,351 INFO L226 Difference]: Without dead ends: 1506 [2022-11-19 07:11:47,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:47,351 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, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:47,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-19 07:11:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-19 07:11:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-11-19 07:11:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1494 states have (on average 3.6244979919678717) internal successors, (5415), 1505 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5415 transitions. [2022-11-19 07:11:47,404 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5415 transitions. Word has length 13 [2022-11-19 07:11:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:47,405 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 5415 transitions. [2022-11-19 07:11:47,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:11:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5415 transitions. [2022-11-19 07:11:47,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:11:47,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:47,407 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:47,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2022-11-19 07:11:47,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-19 07:11:47,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:47,808 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:11:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -749755685, now seen corresponding path program 1 times [2022-11-19 07:11:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:11:47,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701335977] [2022-11-19 07:11:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:47,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:11:47,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:11:47,810 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:11:47,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-19 07:11:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:11:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:48,163 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:11:48,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:11:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:48,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:50,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:11:50,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701335977] [2022-11-19 07:11:50,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701335977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:50,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446991232] [2022-11-19 07:11:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:50,188 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:11:50,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:11:50,190 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:11:50,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-19 07:11:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:11:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:51,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:52,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1446991232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:52,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670178792] [2022-11-19 07:11:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:52,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:52,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:52,219 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:52,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-19 07:11:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:11:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:52,593 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:11:52,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:11:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:53,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:55,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670178792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:55,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:11:55,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 45 [2022-11-19 07:11:55,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163594003] [2022-11-19 07:11:55,117 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:11:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:11:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:11:55,119 INFO L87 Difference]: Start difference. First operand 1506 states and 5415 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:23,428 INFO L93 Difference]: Finished difference Result 2613 states and 8640 transitions. [2022-11-19 07:12:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:12:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:12:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:23,434 INFO L225 Difference]: With dead ends: 2613 [2022-11-19 07:12:23,434 INFO L226 Difference]: Without dead ends: 2613 [2022-11-19 07:12:23,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=632, Invalid=4624, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 07:12:23,435 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 872 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 3624 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1100 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:23,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 299 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3624 Invalid, 0 Unknown, 1100 Unchecked, 19.3s Time] [2022-11-19 07:12:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-11-19 07:12:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1766. [2022-11-19 07:12:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1754 states have (on average 3.6168757126567845) internal successors, (6344), 1765 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6344 transitions. [2022-11-19 07:12:23,488 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6344 transitions. Word has length 14 [2022-11-19 07:12:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:23,489 INFO L495 AbstractCegarLoop]: Abstraction has 1766 states and 6344 transitions. [2022-11-19 07:12:23,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6344 transitions. [2022-11-19 07:12:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:12:23,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:23,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:23,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:23,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-19 07:12:23,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-11-19 07:12:24,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:24,105 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:12:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash 267441722, now seen corresponding path program 1 times [2022-11-19 07:12:24,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:24,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456251474] [2022-11-19 07:12:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:24,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:24,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:24,107 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:24,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-19 07:12:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:12:24,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:12:24,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:24,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:24,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456251474] [2022-11-19 07:12:24,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456251474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:24,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:24,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:12:24,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870113572] [2022-11-19 07:12:24,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:24,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:12:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:12:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:12:24,375 INFO L87 Difference]: Start difference. First operand 1766 states and 6344 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:24,517 INFO L93 Difference]: Finished difference Result 1733 states and 6253 transitions. [2022-11-19 07:12:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:12:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:24,522 INFO L225 Difference]: With dead ends: 1733 [2022-11-19 07:12:24,522 INFO L226 Difference]: Without dead ends: 1733 [2022-11-19 07:12:24,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:12:24,523 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:24,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-19 07:12:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2022-11-19 07:12:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1724 states have (on average 3.6270301624129933) internal successors, (6253), 1732 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 6253 transitions. [2022-11-19 07:12:24,576 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 6253 transitions. Word has length 14 [2022-11-19 07:12:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:24,577 INFO L495 AbstractCegarLoop]: Abstraction has 1733 states and 6253 transitions. [2022-11-19 07:12:24,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 6253 transitions. [2022-11-19 07:12:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:12:24,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:24,580 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:24,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:24,793 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:12:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1111360633, now seen corresponding path program 3 times [2022-11-19 07:12:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:24,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546104617] [2022-11-19 07:12:24,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:12:24,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:24,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:24,795 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:24,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-19 07:12:25,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:12:25,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:25,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:12:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:25,234 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:12:25,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:12:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:12:25,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:12:26,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546104617] [2022-11-19 07:12:26,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546104617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1157776398] [2022-11-19 07:12:26,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:12:26,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:26,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:12:26,979 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:12:26,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-19 07:12:27,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:12:27,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:12:27,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:27,734 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:12:27,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:12:28,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 07:12:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:28,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:31,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1157776398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:31,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130450487] [2022-11-19 07:12:31,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:12:31,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:31,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:31,701 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:31,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-19 07:12:32,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:12:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:12:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:35,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130450487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:35,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:12:35,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 56 [2022-11-19 07:12:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644547654] [2022-11-19 07:12:35,287 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:12:35,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-19 07:12:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-19 07:12:35,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:12:35,290 INFO L87 Difference]: Start difference. First operand 1733 states and 6253 transitions. Second operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:13,197 INFO L93 Difference]: Finished difference Result 3794 states and 12250 transitions. [2022-11-19 07:13:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-19 07:13:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 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 [2022-11-19 07:13:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:13,205 INFO L225 Difference]: With dead ends: 3794 [2022-11-19 07:13:13,205 INFO L226 Difference]: Without dead ends: 3794 [2022-11-19 07:13:13,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3643 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=2306, Invalid=10126, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 07:13:13,208 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5340 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 7072 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5340 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 7258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 7072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:13,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5340 Valid, 625 Invalid, 7258 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [186 Valid, 7072 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2022-11-19 07:13:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2022-11-19 07:13:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2065. [2022-11-19 07:13:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2056 states have (on average 3.750486381322957) internal successors, (7711), 2064 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7711 transitions. [2022-11-19 07:13:13,260 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7711 transitions. Word has length 15 [2022-11-19 07:13:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:13,261 INFO L495 AbstractCegarLoop]: Abstraction has 2065 states and 7711 transitions. [2022-11-19 07:13:13,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7711 transitions. [2022-11-19 07:13:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:13:13,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:13,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:13,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-19 07:13:13,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-19 07:13:13,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2022-11-19 07:13:13,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:13:13,864 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:13:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash -134175405, now seen corresponding path program 1 times [2022-11-19 07:13:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:13,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614602201] [2022-11-19 07:13:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:13,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:13,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:13,866 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:13,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-19 07:13:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:14,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:13:14,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:13:14,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:14,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:14,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614602201] [2022-11-19 07:13:14,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614602201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:14,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:14,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:13:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248762312] [2022-11-19 07:13:14,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:14,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:13:14,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:13:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:14,169 INFO L87 Difference]: Start difference. First operand 2065 states and 7711 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:14,319 INFO L93 Difference]: Finished difference Result 2036 states and 7635 transitions. [2022-11-19 07:13:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 19 [2022-11-19 07:13:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:14,325 INFO L225 Difference]: With dead ends: 2036 [2022-11-19 07:13:14,325 INFO L226 Difference]: Without dead ends: 2036 [2022-11-19 07:13:14,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:14,325 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:14,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-11-19 07:13:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 2036. [2022-11-19 07:13:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2031 states have (on average 3.759231905465288) internal successors, (7635), 2035 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 7635 transitions. [2022-11-19 07:13:14,357 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 7635 transitions. Word has length 19 [2022-11-19 07:13:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 2036 states and 7635 transitions. [2022-11-19 07:13:14,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 7635 transitions. [2022-11-19 07:13:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:13:14,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:14,360 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1] [2022-11-19 07:13:14,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-19 07:13:14,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:14,561 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:13:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1682227111, now seen corresponding path program 4 times [2022-11-19 07:13:14,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:14,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846224557] [2022-11-19 07:13:14,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:13:14,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:14,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:14,563 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:14,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-19 07:13:14,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:13:14,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:13:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:15,004 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:13:15,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:13:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:13:15,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:20,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:20,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846224557] [2022-11-19 07:13:20,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846224557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [910514749] [2022-11-19 07:13:20,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:13:20,829 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:13:20,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:13:20,830 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:13:20,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-19 07:13:21,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:13:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:21,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:13:21,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:13:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:13:26,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [910514749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:26,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078438556] [2022-11-19 07:13:26,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:13:26,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:26,653 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:26,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-19 07:13:26,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:13:26,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:26,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:13:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:13:29,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:13:31,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078438556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:31,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:13:31,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14, 14, 14, 14] total 78 [2022-11-19 07:13:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938920769] [2022-11-19 07:13:31,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:31,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-19 07:13:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-19 07:13:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=5582, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:13:31,502 INFO L87 Difference]: Start difference. First operand 2036 states and 7635 transitions. Second operand has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:36,897 INFO L93 Difference]: Finished difference Result 6025 states and 22998 transitions. [2022-11-19 07:14:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-19 07:14:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 07:14:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:36,942 INFO L225 Difference]: With dead ends: 6025 [2022-11-19 07:14:36,942 INFO L226 Difference]: Without dead ends: 6025 [2022-11-19 07:14:36,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6770 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=2816, Invalid=21990, Unknown=0, NotChecked=0, Total=24806 [2022-11-19 07:14:36,944 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2410 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 7595 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2410 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 8643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 7595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 935 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:36,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2410 Valid, 1031 Invalid, 8643 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [113 Valid, 7595 Invalid, 0 Unknown, 935 Unchecked, 29.5s Time] [2022-11-19 07:14:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6025 states. [2022-11-19 07:14:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6025 to 2133. [2022-11-19 07:14:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2128 states have (on average 3.7476503759398496) internal successors, (7975), 2132 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 7975 transitions. [2022-11-19 07:14:37,033 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 7975 transitions. Word has length 20 [2022-11-19 07:14:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:37,033 INFO L495 AbstractCegarLoop]: Abstraction has 2133 states and 7975 transitions. [2022-11-19 07:14:37,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 7975 transitions. [2022-11-19 07:14:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:14:37,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:37,037 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:37,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:37,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-19 07:14:37,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:37,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:14:37,647 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:14:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash -996676289, now seen corresponding path program 3 times [2022-11-19 07:14:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:14:37,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445570990] [2022-11-19 07:14:37,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:14:37,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:37,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:14:37,649 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:14:37,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-19 07:14:38,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:14:38,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:38,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:14:38,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:38,573 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:14:38,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:14:38,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:14:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:14:39,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:14:40,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:14:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445570990] [2022-11-19 07:14:40,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445570990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888458524] [2022-11-19 07:14:40,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:14:40,471 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:14:40,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:14:40,472 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:14:40,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-19 07:14:46,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:14:46,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:14:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:46,522 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:14:46,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:14:46,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:14:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:14:46,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:14:47,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888458524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:47,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163724913] [2022-11-19 07:14:47,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:14:47,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:47,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:47,896 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:47,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-19 07:14:49,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:14:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:14:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:14:50,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:14:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163724913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:51,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:14:51,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 42 [2022-11-19 07:14:51,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388174525] [2022-11-19 07:14:51,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:51,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:14:51,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:14:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:14:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:14:51,132 INFO L87 Difference]: Start difference. First operand 2133 states and 7975 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:06,500 INFO L93 Difference]: Finished difference Result 3410 states and 12210 transitions. [2022-11-19 07:15:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:15:06,501 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 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 21 [2022-11-19 07:15:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:06,507 INFO L225 Difference]: With dead ends: 3410 [2022-11-19 07:15:06,507 INFO L226 Difference]: Without dead ends: 3410 [2022-11-19 07:15:06,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1293, Invalid=5187, Unknown=0, NotChecked=0, Total=6480 [2022-11-19 07:15:06,508 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1595 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 5245 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 5324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 5245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:06,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 527 Invalid, 5324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 5245 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-19 07:15:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2022-11-19 07:15:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2619. [2022-11-19 07:15:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2614 states have (on average 3.7383320581484316) internal successors, (9772), 2618 states have internal predecessors, (9772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 9772 transitions. [2022-11-19 07:15:06,568 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 9772 transitions. Word has length 21 [2022-11-19 07:15:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:06,569 INFO L495 AbstractCegarLoop]: Abstraction has 2619 states and 9772 transitions. [2022-11-19 07:15:06,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 9772 transitions. [2022-11-19 07:15:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:15:06,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:06,573 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:06,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-19 07:15:06,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:06,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:07,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:07,180 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:15:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash 716302773, now seen corresponding path program 4 times [2022-11-19 07:15:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:15:07,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944693863] [2022-11-19 07:15:07,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:15:07,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:15:07,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:15:07,182 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:15:07,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-19 07:15:07,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:15:07,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:15:07,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:15:07,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:07,650 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:15:07,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:15:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:15:08,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:15:14,368 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:15:14,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944693863] [2022-11-19 07:15:14,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944693863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [544421996] [2022-11-19 07:15:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:15:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:15:14,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:15:14,370 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:15:14,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-19 07:15:14,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:15:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:15:14,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:15:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:15:17,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:15:22,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [544421996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:22,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816190485] [2022-11-19 07:15:22,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:15:22,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:22,014 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:22,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-19 07:15:22,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:15:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:15:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:15:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:15:23,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:15:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816190485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:24,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:15:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16, 16, 16, 16] total 73 [2022-11-19 07:15:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472284676] [2022-11-19 07:15:24,114 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:24,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-19 07:15:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:15:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-19 07:15:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4994, Unknown=0, NotChecked=0, Total=5402 [2022-11-19 07:15:24,116 INFO L87 Difference]: Start difference. First operand 2619 states and 9772 transitions. Second operand has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:01,347 INFO L93 Difference]: Finished difference Result 12668 states and 46898 transitions. [2022-11-19 07:19:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-19 07:19:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 07:19:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:01,397 INFO L225 Difference]: With dead ends: 12668 [2022-11-19 07:19:01,397 INFO L226 Difference]: Without dead ends: 12668 [2022-11-19 07:19:01,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8836 ImplicationChecksByTransitivity, 95.8s TimeCoverageRelationStatistics Valid=2774, Invalid=28732, Unknown=0, NotChecked=0, Total=31506 [2022-11-19 07:19:01,401 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 6192 mSDsluCounter, 2411 mSDsCounter, 0 mSdLazyCounter, 25605 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6192 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 28770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 25605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3047 IncrementalHoareTripleChecker+Unchecked, 134.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:01,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6192 Valid, 2473 Invalid, 28770 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [118 Valid, 25605 Invalid, 0 Unknown, 3047 Unchecked, 134.1s Time] [2022-11-19 07:19:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12668 states. [2022-11-19 07:19:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12668 to 3970. [2022-11-19 07:19:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3965 states have (on average 3.9989911727616647) internal successors, (15856), 3969 states have internal predecessors, (15856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 15856 transitions. [2022-11-19 07:19:01,707 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 15856 transitions. Word has length 22 [2022-11-19 07:19:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:01,708 INFO L495 AbstractCegarLoop]: Abstraction has 3970 states and 15856 transitions. [2022-11-19 07:19:01,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 15856 transitions. [2022-11-19 07:19:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:19:01,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:01,713 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:01,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:01,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:02,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:02,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:02,314 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-19 07:19:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:02,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1558960113, now seen corresponding path program 5 times [2022-11-19 07:19:02,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:02,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24257227] [2022-11-19 07:19:02,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:19:02,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:02,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:02,316 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:02,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-19 07:19:02,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:19:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:02,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:19:02,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:03,046 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:19:03,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:19:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:19:04,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:10,293 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:10,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24257227] [2022-11-19 07:19:10,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24257227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:10,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848982259] [2022-11-19 07:19:10,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:19:10,293 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:19:10,294 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:19:10,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-19 07:19:25,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:19:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:25,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:19:25,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:19:28,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:19:33,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848982259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:33,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131548976] [2022-11-19 07:19:33,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:19:33,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:33,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:33,336 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:33,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f5a0ea7-cc7d-4b2d-a21a-79ba8073150d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-19 07:19:41,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:19:41,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:41,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:19:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:19:44,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:19:47,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131548976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:47,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:19:47,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 18, 18, 16, 16] total 93 [2022-11-19 07:19:47,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341831753] [2022-11-19 07:19:47,321 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:47,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-19 07:19:47,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-19 07:19:47,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=7885, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 07:19:47,323 INFO L87 Difference]: Start difference. First operand 3970 states and 15856 transitions. Second operand has 94 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 93 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)