./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/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_1fc5e815-b97d-4a67-964d-82efd03d722c/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 07:57:53,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:57:53,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:57:53,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:57:53,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:57:53,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:57:53,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:57:53,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:57:53,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:57:53,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:57:53,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:57:53,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:57:53,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:57:53,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:57:53,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:57:53,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:57:53,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:57:53,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:57:53,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:57:53,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:57:53,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:57:53,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:57:53,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:57:53,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:57:53,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:57:53,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:57:53,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:57:53,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:57:53,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:57:53,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:57:53,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:57:53,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:57:53,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:57:53,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:57:53,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:57:53,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:57:53,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:57:53,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:57:53,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:57:53,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:57:53,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:57:53,697 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:57:53,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:57:53,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:57:53,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:57:53,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:57:53,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:57:53,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:57:53,741 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:57:53,741 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:57:53,742 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:57:53,742 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:57:53,743 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:57:53,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:57:53,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:57:53,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:57:53,744 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:57:53,745 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:57:53,745 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:57:53,745 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:57:53,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:57:53,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:57:53,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:57:53,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:57:53,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:57:53,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:57:53,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:57:53,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:57:53,749 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:57:53,750 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:57:53,750 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:57:53,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:57:53,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:57:53,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:57:53,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:57:53,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:57:53,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:57:53,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:53,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:57:53,752 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:57:53,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:57:53,753 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:57:53,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:57:53,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:57:53,753 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_1fc5e815-b97d-4a67-964d-82efd03d722c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-19 07:57:54,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:57:54,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:57:54,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:57:54,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:57:54,142 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:57:54,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-19 07:57:54,238 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/828e841c5/66b9998f3b6d4978b9a7ea6986243584/FLAG8e460dd61 [2022-11-19 07:57:54,907 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:57:54,908 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-19 07:57:54,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/828e841c5/66b9998f3b6d4978b9a7ea6986243584/FLAG8e460dd61 [2022-11-19 07:57:55,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/828e841c5/66b9998f3b6d4978b9a7ea6986243584 [2022-11-19 07:57:55,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:57:55,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:57:55,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:55,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:57:55,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:57:55,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:55" (1/1) ... [2022-11-19 07:57:55,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ece0a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:55, skipping insertion in model container [2022-11-19 07:57:55,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:55" (1/1) ... [2022-11-19 07:57:55,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:57:55,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:57:55,579 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_1fc5e815-b97d-4a67-964d-82efd03d722c/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-19 07:57:55,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:55,620 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 07:57:55,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67ec8a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:55, skipping insertion in model container [2022-11-19 07:57:55,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:55,632 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:57:55,633 INFO L158 Benchmark]: Toolchain (without parser) took 364.39ms. Allocated memory is still 138.4MB. Free memory was 99.8MB in the beginning and 113.3MB in the end (delta: -13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:57:55,634 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 138.4MB. Free memory was 116.3MB in the beginning and 116.2MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:57:55,635 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.13ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 113.6MB in the end (delta: -14.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:57:55,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 138.4MB. Free memory was 116.3MB in the beginning and 116.2MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 361.13ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 113.6MB in the end (delta: -14.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: 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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/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_1fc5e815-b97d-4a67-964d-82efd03d722c/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 07:57:58,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:57:58,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:57:58,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:57:58,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:57:58,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:57:58,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:57:58,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:57:58,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:57:58,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:57:58,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:57:58,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:57:58,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:57:58,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:57:58,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:57:58,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:57:58,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:57:58,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:57:58,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:57:58,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:57:58,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:57:58,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:57:58,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:57:58,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:57:58,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:57:58,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:57:58,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:57:58,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:57:58,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:57:58,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:57:58,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:57:58,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:57:58,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:57:58,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:57:58,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:57:58,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:57:58,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:57:58,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:57:58,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:57:58,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:57:58,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:57:58,325 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:57:58,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:57:58,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:57:58,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:57:58,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:57:58,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:57:58,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:57:58,390 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:57:58,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:57:58,391 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:57:58,391 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:57:58,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:57:58,392 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:57:58,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:57:58,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:57:58,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:57:58,394 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:57:58,394 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:57:58,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:57:58,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:57:58,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:57:58,401 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:57:58,401 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:57:58,401 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:57:58,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:57:58,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:57:58,405 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:57:58,405 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:57:58,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:57:58,407 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:57:58,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:57:58,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:57:58,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:57:58,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:58,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:57:58,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:57:58,409 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:57:58,410 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:57:58,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:57:58,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:57:58,411 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_1fc5e815-b97d-4a67-964d-82efd03d722c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-19 07:57:58,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:57:58,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:57:58,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:57:58,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:57:58,935 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:57:58,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-19 07:57:59,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/d2b64c891/ca882f143d80407db4f67f14063d273c/FLAG6d3422d3d [2022-11-19 07:57:59,758 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:57:59,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-19 07:57:59,774 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/d2b64c891/ca882f143d80407db4f67f14063d273c/FLAG6d3422d3d [2022-11-19 07:58:00,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/data/d2b64c891/ca882f143d80407db4f67f14063d273c [2022-11-19 07:58:00,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:58:00,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:58:00,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:58:00,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:58:00,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:58:00,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26df71b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00, skipping insertion in model container [2022-11-19 07:58:00,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:58:00,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:58:00,347 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_1fc5e815-b97d-4a67-964d-82efd03d722c/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-19 07:58:00,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:58:00,378 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:58:00,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:58:00,440 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_1fc5e815-b97d-4a67-964d-82efd03d722c/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-19 07:58:00,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:58:00,469 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:58:00,526 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_1fc5e815-b97d-4a67-964d-82efd03d722c/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-19 07:58:00,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:58:00,575 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:58:00,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00 WrapperNode [2022-11-19 07:58:00,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:58:00,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:58:00,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:58:00,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:58:00,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,672 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 262 [2022-11-19 07:58:00,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:58:00,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:58:00,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:58:00,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:58:00,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,759 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:58:00,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:58:00,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:58:00,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:58:00,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (1/1) ... [2022-11-19 07:58:00,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:58:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:00,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:58:00,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:58:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:58:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:58:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:58:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:58:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:58:00,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:58:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:58:00,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:58:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:58:00,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:58:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:58:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:58:00,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:58:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:58:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:58:00,891 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 07:58:01,096 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:58:01,100 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:58:02,188 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:58:02,205 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:58:02,206 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:58:02,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:02 BoogieIcfgContainer [2022-11-19 07:58:02,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:58:02,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:58:02,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:58:02,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:58:02,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:58:00" (1/3) ... [2022-11-19 07:58:02,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6096e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:02, skipping insertion in model container [2022-11-19 07:58:02,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:00" (2/3) ... [2022-11-19 07:58:02,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6096e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:02, skipping insertion in model container [2022-11-19 07:58:02,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:02" (3/3) ... [2022-11-19 07:58:02,221 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-11-19 07:58:02,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:58:02,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-19 07:58:02,258 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:58:02,598 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 07:58:02,681 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:58:02,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-19 07:58:02,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-19 07:58:02,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 393 transitions, 810 flow [2022-11-19 07:58:03,008 INFO L130 PetriNetUnfolder]: 29/390 cut-off events. [2022-11-19 07:58:03,008 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 07:58:03,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 390 events. 29/390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 654 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-11-19 07:58:03,068 INFO L119 LiptonReduction]: Number of co-enabled transitions 20950 [2022-11-19 07:59:24,211 INFO L134 LiptonReduction]: Checked pairs total: 21781 [2022-11-19 07:59:24,211 INFO L136 LiptonReduction]: Total number of compositions: 466 [2022-11-19 07:59:24,221 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 63 transitions, 150 flow [2022-11-19 07:59:24,354 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states 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 07:59:24,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:59:24,389 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;@2d6c7775, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:59:24,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-19 07:59:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states 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 07:59:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:59:24,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:24,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:59:24,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 07:59:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash 49928, now seen corresponding path program 1 times [2022-11-19 07:59:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:59:24,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725796650] [2022-11-19 07:59:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:24,426 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 07:59:24,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:59:24,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:24,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:59:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:24,769 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:59:24,770 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 07:59:24,808 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 07:59:24,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:59:24,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:59:24,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725796650] [2022-11-19 07:59:24,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725796650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:24,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:24,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:59:24,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157433693] [2022-11-19 07:59:24,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:24,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:59:24,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:59:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:59:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:59:24,894 INFO L87 Difference]: Start difference. First operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 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 07:59:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:25,377 INFO L93 Difference]: Finished difference Result 1248 states and 4342 transitions. [2022-11-19 07:59:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:59:25,381 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 07:59:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:25,416 INFO L225 Difference]: With dead ends: 1248 [2022-11-19 07:59:25,416 INFO L226 Difference]: Without dead ends: 1248 [2022-11-19 07:59:25,417 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 07:59:25,421 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:25,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:59:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-11-19 07:59:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-11-19 07:59:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 974 states have (on average 4.457905544147844) internal successors, (4342), 1247 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states 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 07:59:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4342 transitions. [2022-11-19 07:59:25,606 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4342 transitions. Word has length 2 [2022-11-19 07:59:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:25,607 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 4342 transitions. [2022-11-19 07:59:25,607 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 07:59:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4342 transitions. [2022-11-19 07:59:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:59:25,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:25,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:59:25,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:25,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:25,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 07:59:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash 49929, now seen corresponding path program 1 times [2022-11-19 07:59:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:59:25,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715175774] [2022-11-19 07:59:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:25,826 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 07:59:25,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:59:25,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:25,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:59:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:26,145 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:26,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:59:26,186 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 07:59:26,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:59:26,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:59:26,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715175774] [2022-11-19 07:59:26,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715175774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:26,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:26,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:59:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471301064] [2022-11-19 07:59:26,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:26,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:59:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:59:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:59:26,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:59:26,191 INFO L87 Difference]: Start difference. First operand 1248 states and 4342 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 07:59:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:27,057 INFO L93 Difference]: Finished difference Result 2492 states and 8680 transitions. [2022-11-19 07:59:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:59:27,059 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 07:59:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:27,083 INFO L225 Difference]: With dead ends: 2492 [2022-11-19 07:59:27,084 INFO L226 Difference]: Without dead ends: 2492 [2022-11-19 07:59:27,085 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 07:59:27,096 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:27,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 6 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:59:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-19 07:59:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 1251. [2022-11-19 07:59:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 977 states have (on average 4.452405322415558) internal successors, (4350), 1250 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states 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 07:59:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4350 transitions. [2022-11-19 07:59:27,181 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4350 transitions. Word has length 2 [2022-11-19 07:59:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:27,182 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 4350 transitions. [2022-11-19 07:59:27,182 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 07:59:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4350 transitions. [2022-11-19 07:59:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:59:27,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:27,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:59:27,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-19 07:59:27,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:27,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 07:59:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1554452, now seen corresponding path program 1 times [2022-11-19 07:59:27,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:59:27,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399689556] [2022-11-19 07:59:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:27,399 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 07:59:27,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:59:27,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:27,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:59:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:27,696 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:27,696 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 07:59:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:27,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:28,155 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 07:59:28,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:59:28,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399689556] [2022-11-19 07:59:28,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399689556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:28,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1562431603] [2022-11-19 07:59:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:28,157 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:59:28,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:59:28,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:59:28,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-19 07:59:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:28,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:59:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:28,542 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:28,543 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 07:59:28,609 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 07:59:28,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:28,716 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 07:59:28,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1562431603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805418954] [2022-11-19 07:59:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:28,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:28,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:59:28,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:59:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:59:28,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:29,028 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:29,028 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 07:59:29,119 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 07:59:29,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:29,321 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 07:59:29,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805418954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:29,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:59:29,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 07:59:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283737640] [2022-11-19 07:59:29,322 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:59:29,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:59:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:59:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:59:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:59:29,324 INFO L87 Difference]: Start difference. First operand 1251 states and 4350 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 07:59:31,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:59:33,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:59:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:36,269 INFO L93 Difference]: Finished difference Result 4983 states and 17364 transitions. [2022-11-19 07:59:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:59:36,272 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 07:59:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:36,341 INFO L225 Difference]: With dead ends: 4983 [2022-11-19 07:59:36,346 INFO L226 Difference]: Without dead ends: 4983 [2022-11-19 07:59:36,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:59:36,351 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 305 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:36,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 18 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-19 07:59:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2022-11-19 07:59:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 1260. [2022-11-19 07:59:36,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 986 states have (on average 4.436105476673428) internal successors, (4374), 1259 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states 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 07:59:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 4374 transitions. [2022-11-19 07:59:36,492 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 4374 transitions. Word has length 3 [2022-11-19 07:59:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:36,492 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 4374 transitions. [2022-11-19 07:59:36,492 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 07:59:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 4374 transitions. [2022-11-19 07:59:36,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:59:36,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:36,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:59:36,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:36,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:59:36,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:59:37,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:37,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 07:59:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash 48295142, now seen corresponding path program 1 times [2022-11-19 07:59:37,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:59:37,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147189500] [2022-11-19 07:59:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:37,096 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 07:59:37,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:59:37,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:37,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:59:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:37,425 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:59:37,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-19 07:59:37,477 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:59:37,478 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 07:59:37,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:37,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:59:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:37,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:59:37,745 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 07:59:37,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:59:37,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:59:37,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147189500] [2022-11-19 07:59:37,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147189500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:37,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:37,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:59:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498308654] [2022-11-19 07:59:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:59:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:59:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:59:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:59:37,748 INFO L87 Difference]: Start difference. First operand 1260 states and 4374 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:38,258 INFO L93 Difference]: Finished difference Result 1034 states and 3469 transitions. [2022-11-19 07:59:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:59:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:59:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:38,269 INFO L225 Difference]: With dead ends: 1034 [2022-11-19 07:59:38,269 INFO L226 Difference]: Without dead ends: 1034 [2022-11-19 07:59:38,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:59:38,271 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:38,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2022-11-19 07:59:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-19 07:59:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2022-11-19 07:59:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 824 states have (on average 4.209951456310679) internal successors, (3469), 1033 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states 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 07:59:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3469 transitions. [2022-11-19 07:59:38,341 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3469 transitions. Word has length 4 [2022-11-19 07:59:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:38,342 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 3469 transitions. [2022-11-19 07:59:38,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3469 transitions. [2022-11-19 07:59:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:59:38,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:38,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:59:38,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:38,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 07:59:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash 48295143, now seen corresponding path program 1 times [2022-11-19 07:59:38,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:59:38,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463254301] [2022-11-19 07:59:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:38,563 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 07:59:38,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:59:38,565 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:38,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:59:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:38,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:59:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:38,836 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:59:38,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 07:59:38,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:38,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:59:39,036 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:59:39,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:59:39,058 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 07:59:39,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:59:39,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:59:39,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463254301] [2022-11-19 07:59:39,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463254301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:39,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:39,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:59:39,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314264650] [2022-11-19 07:59:39,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:39,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:59:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:59:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:59:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:59:39,061 INFO L87 Difference]: Start difference. First operand 1034 states and 3469 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:39,488 INFO L93 Difference]: Finished difference Result 808 states and 2564 transitions. [2022-11-19 07:59:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:59:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:59:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:39,496 INFO L225 Difference]: With dead ends: 808 [2022-11-19 07:59:39,496 INFO L226 Difference]: Without dead ends: 808 [2022-11-19 07:59:39,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 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 07:59:39,497 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:39,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-19 07:59:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-19 07:59:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-11-19 07:59:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 662 states have (on average 3.8731117824773413) internal successors, (2564), 807 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 07:59:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2564 transitions. [2022-11-19 07:59:39,530 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2564 transitions. Word has length 4 [2022-11-19 07:59:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:39,530 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 2564 transitions. [2022-11-19 07:59:39,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2564 transitions. [2022-11-19 07:59:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:59:39,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:39,532 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:59:39,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:59:39,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:39,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 07:59:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash -929354295, now seen corresponding path program 2 times [2022-11-19 07:59:39,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:59:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060373095] [2022-11-19 07:59:39,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:59:39,748 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 07:59:39,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:59:39,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 07:59:39,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 07:59:39,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:59:39,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:59:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:59:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:40,081 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:40,081 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 07:59:40,309 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 07:59:40,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:41,221 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 07:59:41,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:59:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060373095] [2022-11-19 07:59:41,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060373095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:41,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211404295] [2022-11-19 07:59:41,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:59:41,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:59:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:59:41,223 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:59:41,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 07:59:41,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:59:41,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:59:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:59:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:41,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:41,674 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 07:59:41,828 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 07:59:41,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:43,026 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 07:59:43,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211404295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679159495] [2022-11-19 07:59:43,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:59:43,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:43,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:43,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:59:43,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:59:43,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:59:43,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:59:43,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:59:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:43,357 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:43,358 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 07:59:43,478 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 07:59:43,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:43,706 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 07:59:43,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679159495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:43,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:59:43,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 07:59:43,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280804892] [2022-11-19 07:59:43,708 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:59:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:59:43,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:59:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:59:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:59:43,709 INFO L87 Difference]: Start difference. First operand 808 states and 2564 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 07:59:48,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:59:50,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:59:52,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:59:54,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:59:56,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:59:58,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:00,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:02,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:04,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:06,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:08,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:10,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:12,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:14,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:16,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:19,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:21,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:23,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:26,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:33,626 INFO L93 Difference]: Finished difference Result 7137 states and 22835 transitions. [2022-11-19 08:00:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:00:33,629 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 08:00:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:33,715 INFO L225 Difference]: With dead ends: 7137 [2022-11-19 08:00:33,715 INFO L226 Difference]: Without dead ends: 7137 [2022-11-19 08:00:33,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:00:33,716 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2123 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 271 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:33,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 114 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1619 Invalid, 13 Unknown, 0 Unchecked, 47.0s Time] [2022-11-19 08:00:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7137 states. [2022-11-19 08:00:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7137 to 821. [2022-11-19 08:00:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 675 states have (on average 3.84) internal successors, (2592), 820 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2592 transitions. [2022-11-19 08:00:33,867 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2592 transitions. Word has length 6 [2022-11-19 08:00:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:33,868 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 2592 transitions. [2022-11-19 08:00:33,868 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 08:00:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2592 transitions. [2022-11-19 08:00:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:00:33,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:33,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:00:33,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:34,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:34,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:34,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:34,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -832972211, now seen corresponding path program 1 times [2022-11-19 08:00:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:34,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562042291] [2022-11-19 08:00:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:34,475 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 08:00:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:34,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:34,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 08:00:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:34,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:00:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:34,754 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 08:00:34,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-19 08:00:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:34,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:00:35,079 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:00:35,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:00:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:35,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:35,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562042291] [2022-11-19 08:00:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562042291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:35,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:35,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:00:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133613997] [2022-11-19 08:00:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:35,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:35,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:35,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:35,146 INFO L87 Difference]: Start difference. First operand 821 states and 2592 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 08:00:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:35,573 INFO L93 Difference]: Finished difference Result 771 states and 2447 transitions. [2022-11-19 08:00:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:35,575 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 08:00:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:35,578 INFO L225 Difference]: With dead ends: 771 [2022-11-19 08:00:35,578 INFO L226 Difference]: Without dead ends: 771 [2022-11-19 08:00:35,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:35,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-19 08:00:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-19 08:00:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-19 08:00:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 649 states have (on average 3.7704160246533127) internal successors, (2447), 770 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2447 transitions. [2022-11-19 08:00:35,663 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2447 transitions. Word has length 6 [2022-11-19 08:00:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:35,664 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 2447 transitions. [2022-11-19 08:00:35,664 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 08:00:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2447 transitions. [2022-11-19 08:00:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:00:35,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:35,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:00:35,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:35,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:35,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash -832972210, now seen corresponding path program 1 times [2022-11-19 08:00:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221232606] [2022-11-19 08:00:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:35,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:35,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:35,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 08:00:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:00:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:36,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:36,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:36,224 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-19 08:00:36,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-19 08:00:36,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-19 08:00:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:36,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:00:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:36,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:00:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:36,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:36,542 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221232606] [2022-11-19 08:00:36,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221232606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:36,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:36,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:00:36,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868836778] [2022-11-19 08:00:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:36,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:36,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:36,544 INFO L87 Difference]: Start difference. First operand 771 states and 2447 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 08:00:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:36,910 INFO L93 Difference]: Finished difference Result 721 states and 2302 transitions. [2022-11-19 08:00:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:36,911 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 08:00:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:36,914 INFO L225 Difference]: With dead ends: 721 [2022-11-19 08:00:36,914 INFO L226 Difference]: Without dead ends: 721 [2022-11-19 08:00:36,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:36,915 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:36,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-19 08:00:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-11-19 08:00:36,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2022-11-19 08:00:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 623 states have (on average 3.695024077046549) internal successors, (2302), 720 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2302 transitions. [2022-11-19 08:00:36,973 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2302 transitions. Word has length 6 [2022-11-19 08:00:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:36,974 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 2302 transitions. [2022-11-19 08:00:36,974 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 08:00:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2302 transitions. [2022-11-19 08:00:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:00:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:36,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:37,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:37,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:37,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -52349683, now seen corresponding path program 1 times [2022-11-19 08:00:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:37,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844175120] [2022-11-19 08:00:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:37,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:37,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:37,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:37,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 08:00:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:37,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:00:37,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:37,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:37,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:37,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844175120] [2022-11-19 08:00:37,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844175120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:37,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:37,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:37,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656211935] [2022-11-19 08:00:37,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:37,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:00:37,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:00:37,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:37,443 INFO L87 Difference]: Start difference. First operand 721 states and 2302 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:38,590 INFO L93 Difference]: Finished difference Result 1188 states and 3674 transitions. [2022-11-19 08:00:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:00:38,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:00:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:38,598 INFO L225 Difference]: With dead ends: 1188 [2022-11-19 08:00:38,599 INFO L226 Difference]: Without dead ends: 1188 [2022-11-19 08:00:38,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:00:38,600 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:38,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 13 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:00:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-11-19 08:00:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 948. [2022-11-19 08:00:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 850 states have (on average 3.603529411764706) internal successors, (3063), 947 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3063 transitions. [2022-11-19 08:00:38,638 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3063 transitions. Word has length 7 [2022-11-19 08:00:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:38,639 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 3063 transitions. [2022-11-19 08:00:38,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3063 transitions. [2022-11-19 08:00:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:00:38,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:38,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:38,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-19 08:00:38,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:38,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:38,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341199, now seen corresponding path program 1 times [2022-11-19 08:00:38,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027332944] [2022-11-19 08:00:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:38,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:38,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:38,858 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:38,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 08:00:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:00:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:39,186 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:00:39,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-19 08:00:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:39,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:00:39,311 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:00:39,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:00:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:39,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:39,417 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027332944] [2022-11-19 08:00:39,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027332944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:39,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:39,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:00:39,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081571929] [2022-11-19 08:00:39,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:39,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:39,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:39,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:39,419 INFO L87 Difference]: Start difference. First operand 948 states and 3063 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:39,763 INFO L93 Difference]: Finished difference Result 957 states and 3094 transitions. [2022-11-19 08:00:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:00:39,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:00:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:39,768 INFO L225 Difference]: With dead ends: 957 [2022-11-19 08:00:39,769 INFO L226 Difference]: Without dead ends: 957 [2022-11-19 08:00:39,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:39,770 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:39,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-19 08:00:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-19 08:00:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2022-11-19 08:00:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 859 states have (on average 3.60186263096624) internal successors, (3094), 956 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3094 transitions. [2022-11-19 08:00:39,805 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3094 transitions. Word has length 8 [2022-11-19 08:00:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:39,806 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 3094 transitions. [2022-11-19 08:00:39,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3094 transitions. [2022-11-19 08:00:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:00:39,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:39,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:39,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:40,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:40,028 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:40,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341198, now seen corresponding path program 1 times [2022-11-19 08:00:40,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:40,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459203882] [2022-11-19 08:00:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:40,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:40,031 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:40,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:00:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:00:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:40,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:40,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:40,359 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:00:40,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:00:40,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:00:40,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:40,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:00:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:40,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:00:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:40,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:40,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459203882] [2022-11-19 08:00:40,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459203882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:40,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:40,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:40,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681443652] [2022-11-19 08:00:40,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:40,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:00:40,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:00:40,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:40,606 INFO L87 Difference]: Start difference. First operand 957 states and 3094 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 08:00:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:41,280 INFO L93 Difference]: Finished difference Result 1399 states and 4413 transitions. [2022-11-19 08:00:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:00:41,282 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 08:00:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:41,287 INFO L225 Difference]: With dead ends: 1399 [2022-11-19 08:00:41,287 INFO L226 Difference]: Without dead ends: 1399 [2022-11-19 08:00:41,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:41,289 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:41,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 9 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 42 Unchecked, 0.7s Time] [2022-11-19 08:00:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-11-19 08:00:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1216. [2022-11-19 08:00:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1118 states have (on average 3.627906976744186) internal successors, (4056), 1215 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4056 transitions. [2022-11-19 08:00:41,354 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4056 transitions. Word has length 8 [2022-11-19 08:00:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:41,354 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 4056 transitions. [2022-11-19 08:00:41,355 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 08:00:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4056 transitions. [2022-11-19 08:00:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:00:41,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:41,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:41,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:41,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:41,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1400687229, now seen corresponding path program 1 times [2022-11-19 08:00:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:41,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280484419] [2022-11-19 08:00:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:41,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:41,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:41,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 08:00:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:00:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:41,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:41,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280484419] [2022-11-19 08:00:41,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280484419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109491714] [2022-11-19 08:00:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:00:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:00:41,976 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:00:41,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-19 08:00:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:00:42,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:42,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:42,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1109491714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:42,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897464437] [2022-11-19 08:00:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:42,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:42,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:42,330 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:42,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:00:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:00:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:42,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:42,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897464437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:42,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:00:42,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 11 [2022-11-19 08:00:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508503118] [2022-11-19 08:00:42,628 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:42,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:00:42,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:00:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:00:42,630 INFO L87 Difference]: Start difference. First operand 1216 states and 4056 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:44,549 INFO L93 Difference]: Finished difference Result 1857 states and 5864 transitions. [2022-11-19 08:00:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:00:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:00:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:44,560 INFO L225 Difference]: With dead ends: 1857 [2022-11-19 08:00:44,561 INFO L226 Difference]: Without dead ends: 1857 [2022-11-19 08:00:44,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:00:44,562 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 307 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:44,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 27 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 08:00:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-19 08:00:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1069. [2022-11-19 08:00:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 971 states have (on average 3.5746652935118433) internal successors, (3471), 1068 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3471 transitions. [2022-11-19 08:00:44,608 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3471 transitions. Word has length 9 [2022-11-19 08:00:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:44,608 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 3471 transitions. [2022-11-19 08:00:44,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3471 transitions. [2022-11-19 08:00:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:00:44,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:44,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:44,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:44,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:45,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:00:45,226 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1247016924, now seen corresponding path program 1 times [2022-11-19 08:00:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:45,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96511104] [2022-11-19 08:00:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:45,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:45,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:45,228 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:45,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 08:00:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:45,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:00:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:45,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:45,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:45,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96511104] [2022-11-19 08:00:45,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96511104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:45,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:45,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:45,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511128693] [2022-11-19 08:00:45,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:45,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:00:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:00:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:45,493 INFO L87 Difference]: Start difference. First operand 1069 states and 3471 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:46,556 INFO L93 Difference]: Finished difference Result 1002 states and 3027 transitions. [2022-11-19 08:00:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:00:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:00:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:46,561 INFO L225 Difference]: With dead ends: 1002 [2022-11-19 08:00:46,562 INFO L226 Difference]: Without dead ends: 1002 [2022-11-19 08:00:46,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 08:00:46,563 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:46,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 13 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:00:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-19 08:00:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 981. [2022-11-19 08:00:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 883 states have (on average 3.405436013590034) internal successors, (3007), 980 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3007 transitions. [2022-11-19 08:00:46,595 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3007 transitions. Word has length 9 [2022-11-19 08:00:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:46,596 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 3007 transitions. [2022-11-19 08:00:46,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3007 transitions. [2022-11-19 08:00:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:00:46,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:46,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:46,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-19 08:00:46,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:46,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash -425172721, now seen corresponding path program 1 times [2022-11-19 08:00:46,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:46,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027815809] [2022-11-19 08:00:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:46,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:46,813 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:46,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 08:00:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:00:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:47,180 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:00:47,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:00:47,226 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:00:47,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:00:47,256 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:00:47,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:00:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:00:47,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:47,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027815809] [2022-11-19 08:00:47,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027815809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:47,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:47,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:00:47,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524864806] [2022-11-19 08:00:47,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:47,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:47,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:47,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:47,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:47,285 INFO L87 Difference]: Start difference. First operand 981 states and 3007 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:47,676 INFO L93 Difference]: Finished difference Result 790 states and 2379 transitions. [2022-11-19 08:00:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:00:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 08:00:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:47,695 INFO L225 Difference]: With dead ends: 790 [2022-11-19 08:00:47,696 INFO L226 Difference]: Without dead ends: 790 [2022-11-19 08:00:47,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:47,697 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:47,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:00:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-19 08:00:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 790. [2022-11-19 08:00:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 727 states have (on average 3.2723521320495186) internal successors, (2379), 789 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2379 transitions. [2022-11-19 08:00:47,723 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2379 transitions. Word has length 10 [2022-11-19 08:00:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:47,723 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 2379 transitions. [2022-11-19 08:00:47,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2379 transitions. [2022-11-19 08:00:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:00:47,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:47,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:47,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:47,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:47,940 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:00:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash -425172720, now seen corresponding path program 1 times [2022-11-19 08:00:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:47,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21459525] [2022-11-19 08:00:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:47,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:47,943 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:00:47,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 08:00:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:00:48,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:48,492 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:00:48,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:00:48,679 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:00:48,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:00:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:48,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:00:48,861 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:00:48,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:00:48,959 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:00:48,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:00:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:00:49,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:52,280 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 08:00:52,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:52,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21459525] [2022-11-19 08:00:52,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21459525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2114638759] [2022-11-19 08:00:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:52,281 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:00:52,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:00:52,282 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:00:52,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-19 08:00:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:00:52,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:52,894 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:00:52,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:00:53,092 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:00:53,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:00:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:53,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:00:53,345 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:00:53,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:00:53,533 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-19 08:00:53,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 08:00:53,925 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 08:00:53,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:57,303 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 08:00:57,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2114638759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:57,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129722942] [2022-11-19 08:00:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:57,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:57,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:57,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:57,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 08:00:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:00:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:57,679 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:00:57,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:00:57,864 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:00:57,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:00:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:58,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:00:58,013 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:00:58,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:00:58,096 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:00:58,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:00:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:00:58,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:04,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129722942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:04,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:01:04,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 24 [2022-11-19 08:01:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817070044] [2022-11-19 08:01:04,289 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:04,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:01:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:01:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:01:04,290 INFO L87 Difference]: Start difference. First operand 790 states and 2379 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:07,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:07,550 INFO L93 Difference]: Finished difference Result 1238 states and 3769 transitions. [2022-11-19 08:01:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:01:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:01:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:07,557 INFO L225 Difference]: With dead ends: 1238 [2022-11-19 08:01:07,557 INFO L226 Difference]: Without dead ends: 1238 [2022-11-19 08:01:07,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:01:07,558 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:07,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 425 Unchecked, 2.1s Time] [2022-11-19 08:01:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-11-19 08:01:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 812. [2022-11-19 08:01:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 749 states have (on average 3.2349799732977305) internal successors, (2423), 811 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2423 transitions. [2022-11-19 08:01:07,617 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2423 transitions. Word has length 10 [2022-11-19 08:01:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:07,617 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 2423 transitions. [2022-11-19 08:01:07,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2423 transitions. [2022-11-19 08:01:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:01:07,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:07,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:07,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:07,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-11-19 08:01:08,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:01:08,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:08,232 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:01:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash -465334900, now seen corresponding path program 1 times [2022-11-19 08:01:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:08,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124555063] [2022-11-19 08:01:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:08,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:08,235 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:01:08,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 08:01:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:01:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:08,541 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:01:08,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-19 08:01:08,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:08,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:01:08,673 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:01:08,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:01:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:08,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:08,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:08,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124555063] [2022-11-19 08:01:08,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124555063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:08,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:08,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:01:08,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129535389] [2022-11-19 08:01:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:08,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:08,783 INFO L87 Difference]: Start difference. First operand 812 states and 2423 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:09,178 INFO L93 Difference]: Finished difference Result 810 states and 2419 transitions. [2022-11-19 08:01:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 08:01:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:09,182 INFO L225 Difference]: With dead ends: 810 [2022-11-19 08:01:09,182 INFO L226 Difference]: Without dead ends: 810 [2022-11-19 08:01:09,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:09,183 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:09,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-19 08:01:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-19 08:01:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2022-11-19 08:01:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 747 states have (on average 3.2382864792503345) internal successors, (2419), 809 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2419 transitions. [2022-11-19 08:01:09,209 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2419 transitions. Word has length 10 [2022-11-19 08:01:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:09,209 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 2419 transitions. [2022-11-19 08:01:09,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2419 transitions. [2022-11-19 08:01:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:01:09,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:09,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:09,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:09,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:09,425 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:01:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:09,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2826511, now seen corresponding path program 1 times [2022-11-19 08:01:09,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:09,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100698362] [2022-11-19 08:01:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:09,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:09,427 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:01:09,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-19 08:01:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:09,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:01:09,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:09,720 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:01:09,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-19 08:01:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:09,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:01:09,860 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:01:09,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:01:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:09,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:09,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:09,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100698362] [2022-11-19 08:01:09,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100698362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:09,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:09,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:01:09,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411982349] [2022-11-19 08:01:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:09,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:09,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:09,982 INFO L87 Difference]: Start difference. First operand 810 states and 2419 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:10,362 INFO L93 Difference]: Finished difference Result 808 states and 2415 transitions. [2022-11-19 08:01:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 08:01:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:10,366 INFO L225 Difference]: With dead ends: 808 [2022-11-19 08:01:10,366 INFO L226 Difference]: Without dead ends: 808 [2022-11-19 08:01:10,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:10,368 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:10,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-19 08:01:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-19 08:01:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-11-19 08:01:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 745 states have (on average 3.2416107382550337) internal successors, (2415), 807 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2415 transitions. [2022-11-19 08:01:10,394 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2415 transitions. Word has length 10 [2022-11-19 08:01:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:10,394 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 2415 transitions. [2022-11-19 08:01:10,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2415 transitions. [2022-11-19 08:01:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:01:10,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:10,396 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1] [2022-11-19 08:01:10,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:01:10,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:10,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:01:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1394031762, now seen corresponding path program 1 times [2022-11-19 08:01:10,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:10,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33885337] [2022-11-19 08:01:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:10,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:10,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:10,612 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:01:10,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:01:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:01:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:10,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:01:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:01:11,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:13,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:13,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33885337] [2022-11-19 08:01:13,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33885337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:13,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681813987] [2022-11-19 08:01:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:13,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:13,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:01:13,036 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:01:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-19 08:01:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:01:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:01:14,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:01:15,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [681813987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981533282] [2022-11-19 08:01:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:15,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:15,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:15,064 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:15,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 08:01:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:01:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:01:15,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:01:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981533282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:15,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:01:15,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7, 7, 7, 7] total 32 [2022-11-19 08:01:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278165602] [2022-11-19 08:01:15,697 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:01:15,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:15,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:01:15,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:01:15,700 INFO L87 Difference]: Start difference. First operand 808 states and 2415 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:27,991 INFO L93 Difference]: Finished difference Result 2407 states and 7496 transitions. [2022-11-19 08:01:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 08:01:27,993 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 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 08:01:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:27,999 INFO L225 Difference]: With dead ends: 2407 [2022-11-19 08:01:28,000 INFO L226 Difference]: Without dead ends: 2407 [2022-11-19 08:01:28,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 08:01:28,001 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 790 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:28,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 180 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1446 Invalid, 0 Unknown, 388 Unchecked, 8.5s Time] [2022-11-19 08:01:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-11-19 08:01:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 809. [2022-11-19 08:01:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 746 states have (on average 3.234584450402145) internal successors, (2413), 808 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2413 transitions. [2022-11-19 08:01:28,045 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2413 transitions. Word has length 11 [2022-11-19 08:01:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:28,045 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 2413 transitions. [2022-11-19 08:01:28,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2413 transitions. [2022-11-19 08:01:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:01:28,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:28,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:28,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:01:28,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-19 08:01:28,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-19 08:01:28,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:28,663 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:01:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -295438054, now seen corresponding path program 1 times [2022-11-19 08:01:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:28,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620603030] [2022-11-19 08:01:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:28,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:28,665 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:01:28,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-19 08:01:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:28,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:01:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:01:29,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:01:29,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620603030] [2022-11-19 08:01:29,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620603030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136819633] [2022-11-19 08:01:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:29,343 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:01:29,344 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:01:29,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-19 08:01:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:29,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:01:29,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:01:29,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:01:29,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136819633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605047642] [2022-11-19 08:01:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:29,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:29,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:29,869 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:29,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 08:01:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:30,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:01:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:01:30,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:01:30,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605047642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:30,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:01:30,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-19 08:01:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781335654] [2022-11-19 08:01:30,271 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:01:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:01:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:01:30,273 INFO L87 Difference]: Start difference. First operand 809 states and 2413 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:34,230 INFO L93 Difference]: Finished difference Result 1458 states and 4363 transitions. [2022-11-19 08:01:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:01:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:01:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:34,235 INFO L225 Difference]: With dead ends: 1458 [2022-11-19 08:01:34,235 INFO L226 Difference]: Without dead ends: 1458 [2022-11-19 08:01:34,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:01:34,236 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 456 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:34,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 71 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 08:01:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-11-19 08:01:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1121. [2022-11-19 08:01:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1058 states have (on average 3.3601134215500945) internal successors, (3555), 1120 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3555 transitions. [2022-11-19 08:01:34,267 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3555 transitions. Word has length 11 [2022-11-19 08:01:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:34,267 INFO L495 AbstractCegarLoop]: Abstraction has 1121 states and 3555 transitions. [2022-11-19 08:01:34,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3555 transitions. [2022-11-19 08:01:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:01:34,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:34,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:34,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-19 08:01:34,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:34,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-19 08:01:34,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:34,870 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:01:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:34,870 INFO L85 PathProgramCache]: Analyzing trace with hash -295441371, now seen corresponding path program 1 times [2022-11-19 08:01:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:34,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503782912] [2022-11-19 08:01:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:34,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:34,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:34,872 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:01:34,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:01:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:01:35,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:35,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:01:35,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:01:35,575 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:01:35,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:01:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:35,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:01:35,752 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:01:35,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:01:35,839 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:01:35,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:01:36,066 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 08:01:36,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:40,984 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 08:01:40,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:40,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503782912] [2022-11-19 08:01:40,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503782912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:40,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190399661] [2022-11-19 08:01:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:40,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:01:40,986 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:01:40,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-19 08:01:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:41,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:01:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:41,639 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:01:41,639 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 17 treesize of output 44 [2022-11-19 08:01:41,829 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:01:41,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:01:42,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:42,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:01:42,080 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:01:42,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:01:42,143 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:01:42,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:01:42,305 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 08:01:42,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:43,908 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 08:01:43,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [190399661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:43,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913492739] [2022-11-19 08:01:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:43,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:43,911 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:43,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 08:01:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:44,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:01:44,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:44,375 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:01:44,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:01:44,577 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:01:44,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:01:44,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:44,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:01:44,708 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:01:44,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:01:44,782 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:01:44,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:01:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:45,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:50,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913492739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:50,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:01:50,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 19 [2022-11-19 08:01:50,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555115745] [2022-11-19 08:01:50,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:01:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:01:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:01:50,637 INFO L87 Difference]: Start difference. First operand 1121 states and 3555 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:54,739 INFO L93 Difference]: Finished difference Result 2789 states and 8837 transitions. [2022-11-19 08:01:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:01:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 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 08:01:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:54,749 INFO L225 Difference]: With dead ends: 2789 [2022-11-19 08:01:54,749 INFO L226 Difference]: Without dead ends: 2789 [2022-11-19 08:01:54,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:01:54,750 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 238 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:54,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 67 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 483 Invalid, 0 Unknown, 442 Unchecked, 3.1s Time] [2022-11-19 08:01:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2022-11-19 08:01:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 1525. [2022-11-19 08:01:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1462 states have (on average 3.436388508891929) internal successors, (5024), 1524 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5024 transitions. [2022-11-19 08:01:54,821 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5024 transitions. Word has length 11 [2022-11-19 08:01:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:54,821 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 5024 transitions. [2022-11-19 08:01:54,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5024 transitions. [2022-11-19 08:01:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:01:54,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:54,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:54,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:55,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:01:55,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:55,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:55,433 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:01:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash -294953489, now seen corresponding path program 1 times [2022-11-19 08:01:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:55,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400850728] [2022-11-19 08:01:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:55,435 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:01:55,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-19 08:01:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:55,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:01:55,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:55,829 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:01:55,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-19 08:01:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:55,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:01:55,980 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:01:55,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:01:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:01:56,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:56,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400850728] [2022-11-19 08:01:56,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400850728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:56,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:56,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:01:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754463586] [2022-11-19 08:01:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:56,070 INFO L87 Difference]: Start difference. First operand 1525 states and 5024 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:56,327 INFO L93 Difference]: Finished difference Result 1529 states and 5075 transitions. [2022-11-19 08:01:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:01:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:56,333 INFO L225 Difference]: With dead ends: 1529 [2022-11-19 08:01:56,333 INFO L226 Difference]: Without dead ends: 1529 [2022-11-19 08:01:56,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:56,334 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:56,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-19 08:01:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-11-19 08:01:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1529. [2022-11-19 08:01:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1466 states have (on average 3.461800818553888) internal successors, (5075), 1528 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5075 transitions. [2022-11-19 08:01:56,414 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5075 transitions. Word has length 11 [2022-11-19 08:01:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:56,416 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 5075 transitions. [2022-11-19 08:01:56,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5075 transitions. [2022-11-19 08:01:56,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:01:56,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:56,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:56,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:01:56,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:56,634 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:01:56,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash -294953488, now seen corresponding path program 1 times [2022-11-19 08:01:56,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:56,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43335233] [2022-11-19 08:01:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:56,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:56,636 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:01:56,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-19 08:01:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:56,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:01:56,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:57,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:57,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:57,134 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:01:57,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-19 08:01:57,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:01:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:57,478 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:01:57,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2022-11-19 08:01:57,780 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:01:57,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:01:58,167 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 08:01:58,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:01,594 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 08:02:01,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:02:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43335233] [2022-11-19 08:02:01,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43335233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [369239772] [2022-11-19 08:02:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:01,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:01,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:02:01,599 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:02:01,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-19 08:02:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:02:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:02,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:02,283 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:02:02,283 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 08:02:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:02,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:02:02,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:02,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:02:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:02:02,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:02,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [369239772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:02,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:02:02,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 9 [2022-11-19 08:02:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119283676] [2022-11-19 08:02:02,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:02,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:02,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:02:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:02,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:02:02,782 INFO L87 Difference]: Start difference. First operand 1529 states and 5075 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:03,132 INFO L93 Difference]: Finished difference Result 1466 states and 4875 transitions. [2022-11-19 08:02:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:03,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:02:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:03,137 INFO L225 Difference]: With dead ends: 1466 [2022-11-19 08:02:03,137 INFO L226 Difference]: Without dead ends: 1466 [2022-11-19 08:02:03,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:02:03,138 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:03,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-11-19 08:02:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-11-19 08:02:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1407. [2022-11-19 08:02:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1356 states have (on average 3.4970501474926254) internal successors, (4742), 1406 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4742 transitions. [2022-11-19 08:02:03,185 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4742 transitions. Word has length 11 [2022-11-19 08:02:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:03,185 INFO L495 AbstractCegarLoop]: Abstraction has 1407 states and 4742 transitions. [2022-11-19 08:02:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4742 transitions. [2022-11-19 08:02:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:02:03,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:03,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:03,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:03,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:03,603 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:02:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash 101446031, now seen corresponding path program 1 times [2022-11-19 08:02:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:02:03,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150001402] [2022-11-19 08:02:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:03,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:02:03,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:02:03,605 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:02:03,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 08:02:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:02:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:03,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:03,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:02:03,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150001402] [2022-11-19 08:02:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150001402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:03,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:03,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506550717] [2022-11-19 08:02:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:02:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:02:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:02:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:03,926 INFO L87 Difference]: Start difference. First operand 1407 states and 4742 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:04,745 INFO L93 Difference]: Finished difference Result 1350 states and 4501 transitions. [2022-11-19 08:02:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:02:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:04,750 INFO L225 Difference]: With dead ends: 1350 [2022-11-19 08:02:04,750 INFO L226 Difference]: Without dead ends: 1350 [2022-11-19 08:02:04,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 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 08:02:04,751 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:04,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 13 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:02:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-19 08:02:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1338. [2022-11-19 08:02:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1287 states have (on average 3.4887334887334887) internal successors, (4490), 1337 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4490 transitions. [2022-11-19 08:02:04,801 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4490 transitions. Word has length 11 [2022-11-19 08:02:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:04,801 INFO L495 AbstractCegarLoop]: Abstraction has 1338 states and 4490 transitions. [2022-11-19 08:02:04,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4490 transitions. [2022-11-19 08:02:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:02:04,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:04,803 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 08:02:04,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:05,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:02:05,017 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:02:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2094627305, now seen corresponding path program 3 times [2022-11-19 08:02:05,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:02:05,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972387884] [2022-11-19 08:02:05,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:02:05,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:02:05,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:02:05,021 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:02:05,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 08:02:05,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:02:05,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:02:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:05,538 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:02:05,538 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 08:02:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:06,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:10,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:02:10,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972387884] [2022-11-19 08:02:10,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972387884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1162866600] [2022-11-19 08:02:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:02:10,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:02:10,412 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:02:10,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-19 08:02:11,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:02:11,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:11,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:02:11,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:11,742 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:02:11,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:02:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:12,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:16,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1162866600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:16,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148946677] [2022-11-19 08:02:16,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:02:16,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:16,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:16,669 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:16,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 08:02:19,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:02:19,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:02:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:19,872 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:02:19,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:02:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:20,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:20,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148946677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:20,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:02:20,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-19 08:02:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308637560] [2022-11-19 08:02:20,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:02:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:02:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:02:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:02:20,637 INFO L87 Difference]: Start difference. First operand 1338 states and 4490 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:42,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:44,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:46,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:48,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:50,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:52,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:54,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:56,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:58,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:00,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:02,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:04,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:06,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:08,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:10,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:12,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:14,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:21,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:23,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:25,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:27,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:29,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:31,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:33,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:35,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:37,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:39,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:41,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:43,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:45,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:47,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:49,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:51,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:53,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:05,393 INFO L93 Difference]: Finished difference Result 8617 states and 29235 transitions. [2022-11-19 08:04:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:04:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:04:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:05,443 INFO L225 Difference]: With dead ends: 8617 [2022-11-19 08:04:05,443 INFO L226 Difference]: Without dead ends: 8617 [2022-11-19 08:04:05,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:04:05,445 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3802 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 803 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3802 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 5675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:05,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3802 Valid, 435 Invalid, 5675 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [803 Valid, 4838 Invalid, 34 Unknown, 0 Unchecked, 87.4s Time] [2022-11-19 08:04:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2022-11-19 08:04:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 1358. [2022-11-19 08:04:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1307 states have (on average 3.4636572302983932) internal successors, (4527), 1357 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4527 transitions. [2022-11-19 08:04:05,563 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4527 transitions. Word has length 12 [2022-11-19 08:04:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:05,563 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 4527 transitions. [2022-11-19 08:04:05,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4527 transitions. [2022-11-19 08:04:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:04:05,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:05,565 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:05,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:05,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:05,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-19 08:04:06,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:06,167 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash -822107536, now seen corresponding path program 2 times [2022-11-19 08:04:06,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:06,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514421480] [2022-11-19 08:04:06,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:04:06,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:06,170 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:06,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-19 08:04:06,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:04:06,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:04:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:06,603 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:04:06,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:04:06,805 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:04:06,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:04:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:06,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:06,978 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:04:06,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:04:07,042 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:04:07,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:04:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:04:07,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:07,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514421480] [2022-11-19 08:04:07,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514421480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:07,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:07,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212866521] [2022-11-19 08:04:07,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:07,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:04:07,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:04:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:07,144 INFO L87 Difference]: Start difference. First operand 1358 states and 4527 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:07,879 INFO L93 Difference]: Finished difference Result 1656 states and 5363 transitions. [2022-11-19 08:04:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:04:07,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:04:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:07,885 INFO L225 Difference]: With dead ends: 1656 [2022-11-19 08:04:07,885 INFO L226 Difference]: Without dead ends: 1656 [2022-11-19 08:04:07,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 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 08:04:07,886 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:07,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 7 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:04:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-11-19 08:04:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1046. [2022-11-19 08:04:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 995 states have (on average 3.4) internal successors, (3383), 1045 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3383 transitions. [2022-11-19 08:04:07,921 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3383 transitions. Word has length 12 [2022-11-19 08:04:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:07,922 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 3383 transitions. [2022-11-19 08:04:07,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3383 transitions. [2022-11-19 08:04:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:04:07,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:07,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:07,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-19 08:04:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:08,138 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:08,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash -553637026, now seen corresponding path program 1 times [2022-11-19 08:04:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:08,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618437799] [2022-11-19 08:04:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:08,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:08,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:08,140 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:08,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-19 08:04:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:04:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:08,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:04:08,520 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:08,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:04:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:04:08,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:08,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618437799] [2022-11-19 08:04:08,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618437799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:08,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:08,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417681236] [2022-11-19 08:04:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:08,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:04:08,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:04:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:04:08,550 INFO L87 Difference]: Start difference. First operand 1046 states and 3383 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:08,885 INFO L93 Difference]: Finished difference Result 803 states and 2530 transitions. [2022-11-19 08:04:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:04:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 08:04:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:08,899 INFO L225 Difference]: With dead ends: 803 [2022-11-19 08:04:08,899 INFO L226 Difference]: Without dead ends: 803 [2022-11-19 08:04:08,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:08,900 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:08,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:04:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-11-19 08:04:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2022-11-19 08:04:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 771 states have (on average 3.2814526588845654) internal successors, (2530), 802 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2530 transitions. [2022-11-19 08:04:08,916 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2530 transitions. Word has length 12 [2022-11-19 08:04:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:08,916 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 2530 transitions. [2022-11-19 08:04:08,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2530 transitions. [2022-11-19 08:04:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:04:08,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:08,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:08,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-19 08:04:09,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:09,127 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -553637025, now seen corresponding path program 1 times [2022-11-19 08:04:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:09,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218958424] [2022-11-19 08:04:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:09,128 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 08:04:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:09,129 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:09,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 08:04:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:09,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:04:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:09,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:04:09,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:04:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:09,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:09,650 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:04:09,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:04:09,836 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 08:04:09,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:10,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:10,519 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 08:04:10,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218958424] [2022-11-19 08:04:10,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218958424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1301526470] [2022-11-19 08:04:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:10,520 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:04:10,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:04:10,521 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:04:10,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-19 08:04:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:04:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:11,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:04:11,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:04:11,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:11,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:11,232 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:04:11,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:04:11,352 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 08:04:11,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:11,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:11,642 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 08:04:11,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1301526470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:11,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206885000] [2022-11-19 08:04:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:11,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:11,644 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:11,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-19 08:04:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:04:11,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:11,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:04:12,162 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:04:12,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:04:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:14,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206885000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:14,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:04:14,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 22 [2022-11-19 08:04:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548841348] [2022-11-19 08:04:14,388 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:04:14,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:04:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:04:14,389 INFO L87 Difference]: Start difference. First operand 803 states and 2530 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:23,980 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:04:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:28,491 INFO L93 Difference]: Finished difference Result 2344 states and 7459 transitions. [2022-11-19 08:04:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 08:04:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:04:28,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:28,499 INFO L225 Difference]: With dead ends: 2344 [2022-11-19 08:04:28,499 INFO L226 Difference]: Without dead ends: 2344 [2022-11-19 08:04:28,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 08:04:28,500 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 461 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:28,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 87 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 577 Invalid, 0 Unknown, 362 Unchecked, 2.9s Time] [2022-11-19 08:04:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-11-19 08:04:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 1081. [2022-11-19 08:04:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1049 states have (on average 3.3746425166825547) internal successors, (3540), 1080 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3540 transitions. [2022-11-19 08:04:28,553 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3540 transitions. Word has length 12 [2022-11-19 08:04:28,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:28,553 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 3540 transitions. [2022-11-19 08:04:28,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3540 transitions. [2022-11-19 08:04:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:04:28,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:28,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:28,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-19 08:04:28,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:04:28,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:29,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:29,156 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash -510649814, now seen corresponding path program 1 times [2022-11-19 08:04:29,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:29,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075197155] [2022-11-19 08:04:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:29,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:29,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:29,158 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:29,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:04:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:29,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:04:29,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:29,466 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:04:29,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-19 08:04:29,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:29,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:04:29,587 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:04:29,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:04:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:29,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:29,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075197155] [2022-11-19 08:04:29,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075197155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:29,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:29,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:04:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793532686] [2022-11-19 08:04:29,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:29,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:04:29,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:04:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:04:29,698 INFO L87 Difference]: Start difference. First operand 1081 states and 3540 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:30,096 INFO L93 Difference]: Finished difference Result 1081 states and 3539 transitions. [2022-11-19 08:04:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:04:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 08:04:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:30,100 INFO L225 Difference]: With dead ends: 1081 [2022-11-19 08:04:30,100 INFO L226 Difference]: Without dead ends: 1081 [2022-11-19 08:04:30,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:30,100 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:30,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-19 08:04:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-11-19 08:04:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1081. [2022-11-19 08:04:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1049 states have (on average 3.373689227836034) internal successors, (3539), 1080 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3539 transitions. [2022-11-19 08:04:30,118 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3539 transitions. Word has length 12 [2022-11-19 08:04:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:30,118 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 3539 transitions. [2022-11-19 08:04:30,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3539 transitions. [2022-11-19 08:04:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:04:30,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:30,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:30,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:04:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:30,321 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash -447785283, now seen corresponding path program 1 times [2022-11-19 08:04:30,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:30,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282359535] [2022-11-19 08:04:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:30,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:30,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:30,323 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:30,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 08:04:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:30,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:04:30,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:30,800 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:04:30,800 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 41 [2022-11-19 08:04:30,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:30,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-19 08:04:30,942 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:04:30,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:04:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:04:31,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:31,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282359535] [2022-11-19 08:04:31,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282359535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:31,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:31,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:04:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104106448] [2022-11-19 08:04:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:31,196 INFO L87 Difference]: Start difference. First operand 1081 states and 3539 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:31,630 INFO L93 Difference]: Finished difference Result 1090 states and 3574 transitions. [2022-11-19 08:04:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:04:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:31,633 INFO L225 Difference]: With dead ends: 1090 [2022-11-19 08:04:31,634 INFO L226 Difference]: Without dead ends: 1090 [2022-11-19 08:04:31,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:31,634 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:31,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-11-19 08:04:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-11-19 08:04:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1090. [2022-11-19 08:04:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1058 states have (on average 3.3780718336483933) internal successors, (3574), 1089 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3574 transitions. [2022-11-19 08:04:31,657 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3574 transitions. Word has length 13 [2022-11-19 08:04:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:31,657 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 3574 transitions. [2022-11-19 08:04:31,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3574 transitions. [2022-11-19 08:04:31,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:04:31,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:31,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:31,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-19 08:04:31,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:31,860 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash -450870093, now seen corresponding path program 2 times [2022-11-19 08:04:31,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:31,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340726363] [2022-11-19 08:04:31,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:04:31,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:31,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:31,862 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:31,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-19 08:04:32,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:04:32,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:04:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:32,225 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:04:32,226 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 41 [2022-11-19 08:04:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:32,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-19 08:04:32,396 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:04:32,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:04:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:04:32,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:32,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:32,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340726363] [2022-11-19 08:04:32,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340726363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:32,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:32,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:04:32,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863458703] [2022-11-19 08:04:32,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:32,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:32,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:32,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:32,627 INFO L87 Difference]: Start difference. First operand 1090 states and 3574 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:32,890 INFO L93 Difference]: Finished difference Result 1099 states and 3617 transitions. [2022-11-19 08:04:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:32,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:04:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:32,894 INFO L225 Difference]: With dead ends: 1099 [2022-11-19 08:04:32,894 INFO L226 Difference]: Without dead ends: 1099 [2022-11-19 08:04:32,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:32,896 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:32,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-19 08:04:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-11-19 08:04:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1087. [2022-11-19 08:04:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1055 states have (on average 3.380094786729858) internal successors, (3566), 1086 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3566 transitions. [2022-11-19 08:04:32,916 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3566 transitions. Word has length 13 [2022-11-19 08:04:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:32,916 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 3566 transitions. [2022-11-19 08:04:32,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3566 transitions. [2022-11-19 08:04:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:04:32,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:32,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:32,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:33,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:33,118 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash -451305333, now seen corresponding path program 3 times [2022-11-19 08:04:33,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:33,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955502423] [2022-11-19 08:04:33,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:04:33,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:33,120 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:33,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:04:33,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:04:33,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:33,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:04:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:33,481 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:04:33,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-19 08:04:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-19 08:04:33,632 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:04:33,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:04:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:04:33,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:33,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:33,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955502423] [2022-11-19 08:04:33,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955502423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:33,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:33,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:04:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693323190] [2022-11-19 08:04:33,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:33,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:33,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:33,901 INFO L87 Difference]: Start difference. First operand 1087 states and 3566 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:34,139 INFO L93 Difference]: Finished difference Result 1089 states and 3577 transitions. [2022-11-19 08:04:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:04:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:34,143 INFO L225 Difference]: With dead ends: 1089 [2022-11-19 08:04:34,143 INFO L226 Difference]: Without dead ends: 1089 [2022-11-19 08:04:34,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:34,144 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:34,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 08:04:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-11-19 08:04:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1078. [2022-11-19 08:04:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1046 states have (on average 3.374760994263862) internal successors, (3530), 1077 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3530 transitions. [2022-11-19 08:04:34,164 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3530 transitions. Word has length 13 [2022-11-19 08:04:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:34,164 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 3530 transitions. [2022-11-19 08:04:34,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3530 transitions. [2022-11-19 08:04:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:04:34,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:34,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:34,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:04:34,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:34,367 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash 17128909, now seen corresponding path program 1 times [2022-11-19 08:04:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600656694] [2022-11-19 08:04:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:34,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:34,369 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:34,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-19 08:04:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:34,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:04:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:34,775 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 08:04:34,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:34,942 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 08:04:34,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:34,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600656694] [2022-11-19 08:04:34,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600656694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1603558977] [2022-11-19 08:04:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:34,943 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:04:34,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:04:34,944 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:04:34,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-19 08:04:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:04:35,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:35,483 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 08:04:35,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:35,540 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 08:04:35,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1603558977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215308982] [2022-11-19 08:04:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:35,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:35,541 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:35,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-19 08:04:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:04:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:35,862 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 08:04:35,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:35,915 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 08:04:35,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215308982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:35,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:04:35,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2022-11-19 08:04:35,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479800692] [2022-11-19 08:04:35,916 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:35,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:04:35,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:04:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:04:35,917 INFO L87 Difference]: Start difference. First operand 1078 states and 3530 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 08:04:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:37,948 INFO L93 Difference]: Finished difference Result 1520 states and 4760 transitions. [2022-11-19 08:04:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:04:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 13 [2022-11-19 08:04:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:37,954 INFO L225 Difference]: With dead ends: 1520 [2022-11-19 08:04:37,954 INFO L226 Difference]: Without dead ends: 1520 [2022-11-19 08:04:37,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:04:37,955 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 244 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:37,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 40 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:04:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-11-19 08:04:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1216. [2022-11-19 08:04:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1184 states have (on average 3.3775337837837838) internal successors, (3999), 1215 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3999 transitions. [2022-11-19 08:04:37,980 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3999 transitions. Word has length 13 [2022-11-19 08:04:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:37,980 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 3999 transitions. [2022-11-19 08:04:37,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 08:04:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3999 transitions. [2022-11-19 08:04:37,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:04:37,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:37,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:37,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:04:38,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-19 08:04:38,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-19 08:04:38,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:04:38,582 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash 17134024, now seen corresponding path program 1 times [2022-11-19 08:04:38,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:38,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936833068] [2022-11-19 08:04:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:38,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:38,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:38,585 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:38,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 08:04:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:38,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:04:38,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:39,011 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 08:04:39,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-19 08:04:39,060 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:04:39,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-19 08:04:39,108 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:04:39,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:04:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:04:39,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:39,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936833068] [2022-11-19 08:04:39,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936833068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:39,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:39,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883688426] [2022-11-19 08:04:39,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:39,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:04:39,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:04:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:39,256 INFO L87 Difference]: Start difference. First operand 1216 states and 3999 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:39,554 INFO L93 Difference]: Finished difference Result 1176 states and 3890 transitions. [2022-11-19 08:04:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:39,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:04:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:39,559 INFO L225 Difference]: With dead ends: 1176 [2022-11-19 08:04:39,559 INFO L226 Difference]: Without dead ends: 1176 [2022-11-19 08:04:39,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:39,560 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:39,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 08:04:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-11-19 08:04:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-11-19 08:04:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1153 states have (on average 3.3738074588031224) internal successors, (3890), 1175 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3890 transitions. [2022-11-19 08:04:39,580 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3890 transitions. Word has length 13 [2022-11-19 08:04:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:39,580 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 3890 transitions. [2022-11-19 08:04:39,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3890 transitions. [2022-11-19 08:04:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:04:39,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:39,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:39,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:39,781 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 17133774, now seen corresponding path program 1 times [2022-11-19 08:04:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:39,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188004060] [2022-11-19 08:04:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:39,783 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:39,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:04:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:40,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:04:40,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:40,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:40,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:40,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188004060] [2022-11-19 08:04:40,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188004060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:40,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124519289] [2022-11-19 08:04:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:40,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:04:40,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:04:40,492 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:04:40,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-19 08:04:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:04:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:41,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:41,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124519289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:41,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344105043] [2022-11-19 08:04:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:41,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:41,098 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:41,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-19 08:04:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:04:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:41,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:41,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344105043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:41,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:04:41,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-19 08:04:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971673804] [2022-11-19 08:04:41,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:04:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:04:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:04:41,481 INFO L87 Difference]: Start difference. First operand 1176 states and 3890 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:44,179 INFO L93 Difference]: Finished difference Result 1384 states and 4292 transitions. [2022-11-19 08:04:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:04:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:04:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:44,184 INFO L225 Difference]: With dead ends: 1384 [2022-11-19 08:04:44,184 INFO L226 Difference]: Without dead ends: 1384 [2022-11-19 08:04:44,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:04:44,185 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 305 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:44,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 63 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 08:04:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-11-19 08:04:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1292. [2022-11-19 08:04:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1269 states have (on average 3.260835303388495) internal successors, (4138), 1291 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4138 transitions. [2022-11-19 08:04:44,209 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4138 transitions. Word has length 13 [2022-11-19 08:04:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:44,209 INFO L495 AbstractCegarLoop]: Abstraction has 1292 states and 4138 transitions. [2022-11-19 08:04:44,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4138 transitions. [2022-11-19 08:04:44,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:04:44,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:44,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:44,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:04:44,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:44,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-19 08:04:44,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:44,811 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:04:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1226083620, now seen corresponding path program 2 times [2022-11-19 08:04:44,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045161006] [2022-11-19 08:04:44,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:04:44,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:44,813 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:44,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:04:45,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:04:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:45,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:04:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:45,328 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:04:45,328 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 42 [2022-11-19 08:04:45,498 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:04:45,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:04:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:45,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:45,651 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:45,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:04:45,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:45,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:45,751 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:04:45,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:04:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:45,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:52,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045161006] [2022-11-19 08:04:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045161006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2034211964] [2022-11-19 08:04:52,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:04:52,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:04:52,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:04:52,159 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:04:52,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-19 08:04:52,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:04:52,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:52,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:04:52,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:53,070 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:04:53,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:04:53,256 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:04:53,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:04:53,621 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:53,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:04:53,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:53,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:53,828 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:04:53,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:04:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:54,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:05:02,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2034211964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:02,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261314500] [2022-11-19 08:05:02,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:05:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:02,455 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:02,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-19 08:05:02,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:05:02,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:05:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 08:05:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:02,918 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:05:02,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:05:03,071 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:05:03,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:05:03,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:05:03,332 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:03,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:05:03,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:05:03,588 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 08:05:03,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:05:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:05:03,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:05:12,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261314500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:12,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:05:12,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 32 [2022-11-19 08:05:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146407393] [2022-11-19 08:05:12,824 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:12,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:05:12,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:05:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:05:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=950, Unknown=2, NotChecked=0, Total=1122 [2022-11-19 08:05:12,826 INFO L87 Difference]: Start difference. First operand 1292 states and 4138 transitions. Second operand has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:05:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:21,815 INFO L93 Difference]: Finished difference Result 4465 states and 15197 transitions. [2022-11-19 08:05:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 08:05:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 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 08:05:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:21,827 INFO L225 Difference]: With dead ends: 4465 [2022-11-19 08:05:21,828 INFO L226 Difference]: Without dead ends: 4465 [2022-11-19 08:05:21,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=502, Invalid=2466, Unknown=2, NotChecked=0, Total=2970 [2022-11-19 08:05:21,829 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 670 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2608 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:21,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 421 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1325 Invalid, 0 Unknown, 2608 Unchecked, 5.7s Time] [2022-11-19 08:05:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2022-11-19 08:05:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 1558. [2022-11-19 08:05:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1535 states have (on average 3.485342019543974) internal successors, (5350), 1557 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:05:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5350 transitions. [2022-11-19 08:05:21,901 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5350 transitions. Word has length 14 [2022-11-19 08:05:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:21,901 INFO L495 AbstractCegarLoop]: Abstraction has 1558 states and 5350 transitions. [2022-11-19 08:05:21,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:05:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5350 transitions. [2022-11-19 08:05:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:05:21,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:21,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:21,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:22,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-19 08:05:22,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:22,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:05:22,517 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:05:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:22,517 INFO L85 PathProgramCache]: Analyzing trace with hash 544820369, now seen corresponding path program 1 times [2022-11-19 08:05:22,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:05:22,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271244716] [2022-11-19 08:05:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:22,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:05:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:05:22,518 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:05:22,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:05:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:22,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:05:22,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:23,009 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:05:23,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:05:23,173 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:05:23,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:05:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:23,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:05:23,343 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:05:23,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:05:23,407 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:05:23,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:05:23,645 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 08:05:23,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:28,571 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 08:05:28,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:05:28,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271244716] [2022-11-19 08:05:28,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271244716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:28,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [553766214] [2022-11-19 08:05:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:28,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:05:28,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:05:28,575 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:05:28,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-19 08:05:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:29,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:05:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:29,271 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:05:29,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:05:29,431 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:05:29,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:05:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:29,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:05:29,661 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:05:29,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:05:29,808 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-19 08:05:29,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 08:05:30,225 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 08:05:30,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:32,599 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 08:05:32,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [553766214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:32,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366397406] [2022-11-19 08:05:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:32,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:32,601 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:32,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-19 08:05:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:32,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:05:32,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:33,028 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:05:33,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:05:33,187 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:05:33,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:05:33,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:33,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:05:33,314 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:05:33,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:05:33,348 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:05:33,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:05:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:33,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366397406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:38,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:05:38,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 24 [2022-11-19 08:05:38,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743355871] [2022-11-19 08:05:38,308 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:38,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:05:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:05:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:05:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:05:38,309 INFO L87 Difference]: Start difference. First operand 1558 states and 5350 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:05:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:40,101 INFO L93 Difference]: Finished difference Result 1898 states and 6906 transitions. [2022-11-19 08:05:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:05:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 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 08:05:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:40,107 INFO L225 Difference]: With dead ends: 1898 [2022-11-19 08:05:40,107 INFO L226 Difference]: Without dead ends: 1898 [2022-11-19 08:05:40,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:05:40,108 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:40,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 83 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 182 Invalid, 0 Unknown, 525 Unchecked, 1.0s Time] [2022-11-19 08:05:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-11-19 08:05:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1684. [2022-11-19 08:05:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1661 states have (on average 3.5484647802528597) internal successors, (5894), 1683 states have internal predecessors, (5894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:05:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5894 transitions. [2022-11-19 08:05:40,143 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5894 transitions. Word has length 14 [2022-11-19 08:05:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:40,143 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 5894 transitions. [2022-11-19 08:05:40,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:05:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5894 transitions. [2022-11-19 08:05:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:05:40,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:40,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:40,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:40,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-19 08:05:40,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:05:40,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:05:40,750 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:05:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:40,751 INFO L85 PathProgramCache]: Analyzing trace with hash 544820794, now seen corresponding path program 1 times [2022-11-19 08:05:40,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:05:40,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581818617] [2022-11-19 08:05:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:40,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:05:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:05:40,752 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:05:40,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 08:05:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:41,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:05:41,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:41,145 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 08:05:41,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:41,413 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 25 treesize of output 21 [2022-11-19 08:05:41,492 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 08:05:41,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:05:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581818617] [2022-11-19 08:05:41,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581818617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133757571] [2022-11-19 08:05:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:41,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:05:41,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:05:41,494 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:05:41,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-19 08:05:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:41,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:05:41,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:42,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:05:42,459 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 08:05:42,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:42,801 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 08:05:42,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1133757571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:42,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911415965] [2022-11-19 08:05:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:42,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:42,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:42,803 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:42,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-19 08:05:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:05:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:43,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:05:43,556 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 08:05:43,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:43,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911415965] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:43,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-19 08:05:43,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 6, 6, 5] total 24 [2022-11-19 08:05:43,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462154967] [2022-11-19 08:05:43,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:43,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:05:43,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:05:43,755 INFO L87 Difference]: Start difference. First operand 1684 states and 5894 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 08:05:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:45,373 INFO L93 Difference]: Finished difference Result 2492 states and 8717 transitions. [2022-11-19 08:05:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 08:05:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:45,382 INFO L225 Difference]: With dead ends: 2492 [2022-11-19 08:05:45,382 INFO L226 Difference]: Without dead ends: 2492 [2022-11-19 08:05:45,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:05:45,383 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 163 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:45,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 21 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 08:05:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-19 08:05:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 1836. [2022-11-19 08:05:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1813 states have (on average 3.8587975730832875) internal successors, (6996), 1835 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:05:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6996 transitions. [2022-11-19 08:05:45,415 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6996 transitions. Word has length 14 [2022-11-19 08:05:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:45,415 INFO L495 AbstractCegarLoop]: Abstraction has 1836 states and 6996 transitions. [2022-11-19 08:05:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 08:05:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6996 transitions. [2022-11-19 08:05:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:05:45,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:45,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:45,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-19 08:05:45,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:05:45,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:46,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:05:46,017 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:05:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash 544820619, now seen corresponding path program 1 times [2022-11-19 08:05:46,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:05:46,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576280878] [2022-11-19 08:05:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:46,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:05:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:05:46,021 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:05:46,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-19 08:05:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:05:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:46,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:05:46,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:05:46,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:46,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:05:46,545 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:05:46,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:05:46,724 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 08:05:46,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:47,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:47,344 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 08:05:47,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:05:47,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576280878] [2022-11-19 08:05:47,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576280878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:47,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15788276] [2022-11-19 08:05:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:47,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:05:47,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:05:47,346 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:05:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-19 08:05:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:05:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:48,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:05:48,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:05:48,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:48,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:05:48,133 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:05:48,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:05:48,257 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 08:05:48,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:48,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:48,640 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 08:05:48,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [15788276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:48,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161137764] [2022-11-19 08:05:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:48,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:48,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:48,642 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:48,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-19 08:05:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:48,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:05:48,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:48,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:05:49,149 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:05:49,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:05:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:49,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:50,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161137764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:50,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:05:50,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 22 [2022-11-19 08:05:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002826184] [2022-11-19 08:05:50,896 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:50,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:05:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:05:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:05:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:05:50,898 INFO L87 Difference]: Start difference. First operand 1836 states and 6996 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 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 08:06:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:05,984 INFO L93 Difference]: Finished difference Result 5129 states and 19071 transitions. [2022-11-19 08:06:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 08:06:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 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 14 [2022-11-19 08:06:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:06,000 INFO L225 Difference]: With dead ends: 5129 [2022-11-19 08:06:06,000 INFO L226 Difference]: Without dead ends: 5129 [2022-11-19 08:06:06,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:06:06,002 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 542 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:06,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 133 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 758 Invalid, 0 Unknown, 605 Unchecked, 4.4s Time] [2022-11-19 08:06:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5129 states. [2022-11-19 08:06:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5129 to 2144. [2022-11-19 08:06:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2121 states have (on average 3.898161244695898) internal successors, (8268), 2143 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 8268 transitions. [2022-11-19 08:06:06,087 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 8268 transitions. Word has length 14 [2022-11-19 08:06:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:06,087 INFO L495 AbstractCegarLoop]: Abstraction has 2144 states and 8268 transitions. [2022-11-19 08:06:06,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 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 08:06:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 8268 transitions. [2022-11-19 08:06:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:06:06,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:06,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:06,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-19 08:06:06,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2022-11-19 08:06:06,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:06,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:06,700 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:06:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:06,700 INFO L85 PathProgramCache]: Analyzing trace with hash 544820797, now seen corresponding path program 1 times [2022-11-19 08:06:06,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:06:06,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083996287] [2022-11-19 08:06:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:06,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:06:06,702 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:06:06,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-19 08:06:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:07,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:06:07,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:07,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:06:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:06:07,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:07,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:06:07,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083996287] [2022-11-19 08:06:07,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083996287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:07,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:07,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:06:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658513948] [2022-11-19 08:06:07,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:06:07,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:06:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:06:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:06:07,053 INFO L87 Difference]: Start difference. First operand 2144 states and 8268 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 08:06:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:07,401 INFO L93 Difference]: Finished difference Result 1980 states and 7344 transitions. [2022-11-19 08:06:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:06:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 08:06:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:07,407 INFO L225 Difference]: With dead ends: 1980 [2022-11-19 08:06:07,408 INFO L226 Difference]: Without dead ends: 1980 [2022-11-19 08:06:07,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:06:07,408 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:07,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:06:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2022-11-19 08:06:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1980. [2022-11-19 08:06:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1961 states have (on average 3.745028046914839) internal successors, (7344), 1979 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 7344 transitions. [2022-11-19 08:06:07,469 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 7344 transitions. Word has length 14 [2022-11-19 08:06:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:07,470 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 7344 transitions. [2022-11-19 08:06:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 08:06:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 7344 transitions. [2022-11-19 08:06:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:06:07,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:07,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:07,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-19 08:06:07,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:07,671 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:06:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1257361779, now seen corresponding path program 1 times [2022-11-19 08:06:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:06:07,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329274697] [2022-11-19 08:06:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:07,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:06:07,674 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:06:07,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:06:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:08,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:06:08,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:08,232 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:06:08,233 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 08:06:08,338 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 08:06:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:06:08,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:06:08,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:06:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329274697] [2022-11-19 08:06:08,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329274697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [112850013] [2022-11-19 08:06:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:08,995 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:06:08,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:06:08,996 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:06:08,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-19 08:06:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:06:09,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:06:09,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:06:10,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [112850013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:10,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240970528] [2022-11-19 08:06:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:10,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:10,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:10,201 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:10,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-19 08:06:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:10,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:06:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:06:10,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:06:11,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240970528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:11,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:06:11,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 31 [2022-11-19 08:06:11,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143533463] [2022-11-19 08:06:11,311 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:11,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:06:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:06:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:06:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:06:11,313 INFO L87 Difference]: Start difference. First operand 1980 states and 7344 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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 08:06:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:14,790 INFO L93 Difference]: Finished difference Result 2306 states and 8750 transitions. [2022-11-19 08:06:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:06:14,792 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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 15 [2022-11-19 08:06:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:14,797 INFO L225 Difference]: With dead ends: 2306 [2022-11-19 08:06:14,797 INFO L226 Difference]: Without dead ends: 2306 [2022-11-19 08:06:14,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=393, Invalid=1329, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 08:06:14,798 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 653 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:14,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 78 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 08:06:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-11-19 08:06:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1564. [2022-11-19 08:06:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1545 states have (on average 3.7715210355987057) internal successors, (5827), 1563 states have internal predecessors, (5827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5827 transitions. [2022-11-19 08:06:14,843 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5827 transitions. Word has length 15 [2022-11-19 08:06:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 5827 transitions. [2022-11-19 08:06:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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 08:06:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5827 transitions. [2022-11-19 08:06:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:06:14,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:14,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:14,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:15,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:15,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-11-19 08:06:15,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:15,459 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:06:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash 646127822, now seen corresponding path program 3 times [2022-11-19 08:06:15,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:06:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798512830] [2022-11-19 08:06:15,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:06:15,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:15,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:06:15,461 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:06:15,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-19 08:06:15,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:06:15,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:06:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:06:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:16,013 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:06:16,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:06:16,177 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:06:16,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:06:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:16,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 08:06:16,383 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:16,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:06:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:16,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:06:16,517 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:06:16,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:06:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:06:16,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:06:21,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:06:21,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798512830] [2022-11-19 08:06:21,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798512830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:21,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [794310300] [2022-11-19 08:06:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:06:21,038 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:06:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:06:21,039 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:06:21,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-19 08:06:21,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:06:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:06:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:06:21,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:06:22,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:06:23,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [794310300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:23,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100569998] [2022-11-19 08:06:23,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:06:23,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:23,215 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:23,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-19 08:06:23,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:06:23,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:06:23,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:06:23,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:06:23,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:06:24,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100569998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:24,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:06:24,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 7, 7, 7] total 32 [2022-11-19 08:06:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821884817] [2022-11-19 08:06:24,080 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:06:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:06:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:06:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=948, Unknown=1, NotChecked=0, Total=1122 [2022-11-19 08:06:24,082 INFO L87 Difference]: Start difference. First operand 1564 states and 5827 transitions. Second operand has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:42,876 INFO L93 Difference]: Finished difference Result 2834 states and 10431 transitions. [2022-11-19 08:06:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 08:06:42,878 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 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 08:06:42,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:42,884 INFO L225 Difference]: With dead ends: 2834 [2022-11-19 08:06:42,884 INFO L226 Difference]: Without dead ends: 2834 [2022-11-19 08:06:42,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=775, Invalid=3384, Unknown=1, NotChecked=0, Total=4160 [2022-11-19 08:06:42,886 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1356 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:42,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 377 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2686 Invalid, 0 Unknown, 22 Unchecked, 12.0s Time] [2022-11-19 08:06:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-11-19 08:06:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2170. [2022-11-19 08:06:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2151 states have (on average 3.8609948860994887) internal successors, (8305), 2169 states have internal predecessors, (8305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 8305 transitions. [2022-11-19 08:06:42,929 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 8305 transitions. Word has length 15 [2022-11-19 08:06:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:42,929 INFO L495 AbstractCegarLoop]: Abstraction has 2170 states and 8305 transitions. [2022-11-19 08:06:42,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 8305 transitions. [2022-11-19 08:06:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:06:42,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:42,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:42,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-11-19 08:06:43,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-19 08:06:43,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:43,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:43,531 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:06:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash -290430689, now seen corresponding path program 1 times [2022-11-19 08:06:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:06:43,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391777473] [2022-11-19 08:06:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:43,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:43,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:06:43,533 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:06:43,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:06:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:06:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:44,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:06:44,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:06:44,256 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:06:44,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:06:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:44,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:06:44,450 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:06:44,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:06:44,533 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:06:44,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:06:44,797 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 08:06:44,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:49,831 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 08:06:49,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:06:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391777473] [2022-11-19 08:06:49,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391777473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1964008435] [2022-11-19 08:06:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:49,832 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:06:49,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:06:49,833 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:06:49,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-19 08:06:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:50,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:06:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:50,845 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:06:50,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:06:51,039 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:06:51,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:06:51,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:51,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:06:51,285 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:06:51,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:06:51,343 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:06:51,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:06:51,575 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 08:06:51,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:52,261 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 08:06:52,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1964008435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:52,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231980182] [2022-11-19 08:06:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:52,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:52,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:52,263 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:52,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-19 08:06:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:06:52,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:52,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:06:52,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:06:53,010 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:06:53,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:06:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:53,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:06:53,158 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:06:53,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:06:53,217 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:06:53,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:06:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:06:53,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:06:59,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231980182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:59,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:06:59,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 19 [2022-11-19 08:06:59,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844757484] [2022-11-19 08:06:59,074 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:59,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:06:59,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:06:59,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:06:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:06:59,075 INFO L87 Difference]: Start difference. First operand 2170 states and 8305 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:02,924 INFO L93 Difference]: Finished difference Result 2702 states and 9774 transitions. [2022-11-19 08:07:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:07:02,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 08:07:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:02,932 INFO L225 Difference]: With dead ends: 2702 [2022-11-19 08:07:02,933 INFO L226 Difference]: Without dead ends: 2702 [2022-11-19 08:07:02,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:07:02,933 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 220 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:02,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 100 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 498 Invalid, 0 Unknown, 394 Unchecked, 2.5s Time] [2022-11-19 08:07:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2022-11-19 08:07:02,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2176. [2022-11-19 08:07:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2157 states have (on average 3.782568382012054) internal successors, (8159), 2175 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8159 transitions. [2022-11-19 08:07:03,030 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8159 transitions. Word has length 15 [2022-11-19 08:07:03,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:03,030 INFO L495 AbstractCegarLoop]: Abstraction has 2176 states and 8159 transitions. [2022-11-19 08:07:03,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8159 transitions. [2022-11-19 08:07:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:07:03,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:03,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:03,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:03,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-19 08:07:03,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:03,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:07:03,641 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:07:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash -290423125, now seen corresponding path program 1 times [2022-11-19 08:07:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:07:03,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362212317] [2022-11-19 08:07:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:03,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:07:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:07:03,643 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:07:03,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:07:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:04,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:07:04,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:07:04,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:07:04,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:07:04,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362212317] [2022-11-19 08:07:04,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362212317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:04,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899233969] [2022-11-19 08:07:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:04,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:07:04,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:07:04,389 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:07:04,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-19 08:07:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:07:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:07:05,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:07:05,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [899233969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607362983] [2022-11-19 08:07:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:05,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:05,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:05,157 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:05,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-19 08:07:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:07:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:07:05,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:07:05,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607362983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:05,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:07:05,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-19 08:07:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536368871] [2022-11-19 08:07:05,671 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:07:05,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:07:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:07:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:07:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:07:05,672 INFO L87 Difference]: Start difference. First operand 2176 states and 8159 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:07,815 INFO L93 Difference]: Finished difference Result 2118 states and 7880 transitions. [2022-11-19 08:07:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:07:07,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 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 08:07:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:07,822 INFO L225 Difference]: With dead ends: 2118 [2022-11-19 08:07:07,822 INFO L226 Difference]: Without dead ends: 2118 [2022-11-19 08:07:07,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:07:07,823 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 277 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:07,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 58 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:07:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2022-11-19 08:07:07,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2076. [2022-11-19 08:07:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2057 states have (on average 3.797277588721439) internal successors, (7811), 2075 states have internal predecessors, (7811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 7811 transitions. [2022-11-19 08:07:07,874 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 7811 transitions. Word has length 15 [2022-11-19 08:07:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:07,875 INFO L495 AbstractCegarLoop]: Abstraction has 2076 states and 7811 transitions. [2022-11-19 08:07:07,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 7811 transitions. [2022-11-19 08:07:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:07:07,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:07,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:07,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:08,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-19 08:07:08,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-19 08:07:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:07:08,490 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:07:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash -979620143, now seen corresponding path program 2 times [2022-11-19 08:07:08,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:07:08,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474627276] [2022-11-19 08:07:08,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:07:08,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:07:08,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:07:08,492 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:07:08,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-19 08:07:08,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:07:08,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:07:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:08,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:07:08,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:07:08,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:08,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:07:08,931 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:07:08,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:07:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:07:09,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:07:09,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:07:09,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474627276] [2022-11-19 08:07:09,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474627276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:09,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:07:09,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:07:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298917806] [2022-11-19 08:07:09,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:09,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:07:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:07:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:07:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:07:09,096 INFO L87 Difference]: Start difference. First operand 2076 states and 7811 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:09,669 INFO L93 Difference]: Finished difference Result 2106 states and 7597 transitions. [2022-11-19 08:07:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:07:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 16 [2022-11-19 08:07:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:09,675 INFO L225 Difference]: With dead ends: 2106 [2022-11-19 08:07:09,675 INFO L226 Difference]: Without dead ends: 2106 [2022-11-19 08:07:09,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:07:09,675 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 84 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:09,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 7 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:07:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2022-11-19 08:07:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1763. [2022-11-19 08:07:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1744 states have (on average 3.658256880733945) internal successors, (6380), 1762 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 6380 transitions. [2022-11-19 08:07:09,705 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 6380 transitions. Word has length 16 [2022-11-19 08:07:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:09,705 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 6380 transitions. [2022-11-19 08:07:09,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 6380 transitions. [2022-11-19 08:07:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:07:09,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:09,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:09,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-19 08:07:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:07:09,908 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:07:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -980057584, now seen corresponding path program 2 times [2022-11-19 08:07:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:07:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573787842] [2022-11-19 08:07:09,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:07:09,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:07:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:07:09,909 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:07:09,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:07:10,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:07:10,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:10,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:07:10,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:10,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:07:10,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:07:10,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:10,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:07:10,390 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:07:10,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:07:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:10,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:11,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:07:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573787842] [2022-11-19 08:07:11,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573787842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:11,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049153635] [2022-11-19 08:07:11,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:07:11,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:07:11,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:07:11,582 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:07:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-19 08:07:12,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:07:12,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:07:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:12,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:07:12,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:07:12,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:12,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:07:12,749 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:07:12,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:07:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:13,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:13,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:07:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:13,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049153635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:13,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283772779] [2022-11-19 08:07:13,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:07:13,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:13,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:13,826 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:13,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-19 08:07:14,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:07:14,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:14,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:07:14,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:14,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:07:14,767 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:07:14,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:07:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:07:15,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:07:21,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283772779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:21,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:07:21,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 11, 10] total 39 [2022-11-19 08:07:21,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394631315] [2022-11-19 08:07:21,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:07:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 08:07:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:07:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 08:07:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1337, Unknown=1, NotChecked=0, Total=1560 [2022-11-19 08:07:21,347 INFO L87 Difference]: Start difference. First operand 1763 states and 6380 transitions. Second operand has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:32,521 INFO L93 Difference]: Finished difference Result 2424 states and 8777 transitions. [2022-11-19 08:07:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 08:07:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:07:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:32,529 INFO L225 Difference]: With dead ends: 2424 [2022-11-19 08:07:32,529 INFO L226 Difference]: Without dead ends: 2424 [2022-11-19 08:07:32,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=634, Invalid=3655, Unknown=1, NotChecked=0, Total=4290 [2022-11-19 08:07:32,530 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 223 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:32,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 151 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 578 Invalid, 0 Unknown, 514 Unchecked, 2.3s Time] [2022-11-19 08:07:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-11-19 08:07:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2092. [2022-11-19 08:07:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2073 states have (on average 3.697057404727448) internal successors, (7664), 2091 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7664 transitions. [2022-11-19 08:07:32,603 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7664 transitions. Word has length 16 [2022-11-19 08:07:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:32,603 INFO L495 AbstractCegarLoop]: Abstraction has 2092 states and 7664 transitions. [2022-11-19 08:07:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7664 transitions. [2022-11-19 08:07:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:07:32,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:32,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:32,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:32,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:33,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-19 08:07:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:33,219 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:07:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -317005046, now seen corresponding path program 1 times [2022-11-19 08:07:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:07:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991139374] [2022-11-19 08:07:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:33,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:07:33,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:07:33,221 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:07:33,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:07:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:07:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:33,854 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:07:33,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:07:33,995 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:07:33,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 08:07:34,122 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:07:34,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:07:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:34,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:35,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:07:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991139374] [2022-11-19 08:07:35,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991139374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:35,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1893764834] [2022-11-19 08:07:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:35,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:07:35,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:07:35,556 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:07:35,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-19 08:07:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:07:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:36,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:07:36,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:07:36,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:36,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:07:36,785 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:07:36,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:07:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:37,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:38,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:07:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:07:38,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1893764834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:38,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853242722] [2022-11-19 08:07:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:38,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:38,822 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:38,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-19 08:07:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:39,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:07:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:39,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:07:39,669 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:07:39,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:07:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:07:40,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:07:44,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853242722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:44,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:07:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 11, 10] total 38 [2022-11-19 08:07:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781881853] [2022-11-19 08:07:44,311 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:07:44,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 08:07:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:07:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 08:07:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:07:44,313 INFO L87 Difference]: Start difference. First operand 2092 states and 7664 transitions. Second operand has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:07:51,527 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 66 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:08:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:08,647 INFO L93 Difference]: Finished difference Result 4815 states and 17510 transitions. [2022-11-19 08:08:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 08:08:08,650 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 08:08:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:08,664 INFO L225 Difference]: With dead ends: 4815 [2022-11-19 08:08:08,664 INFO L226 Difference]: Without dead ends: 4815 [2022-11-19 08:08:08,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=971, Invalid=4729, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 08:08:08,665 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1320 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1655 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:08,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 295 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1425 Invalid, 0 Unknown, 1655 Unchecked, 7.0s Time] [2022-11-19 08:08:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2022-11-19 08:08:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 2789. [2022-11-19 08:08:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2770 states have (on average 3.872202166064982) internal successors, (10726), 2788 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 10726 transitions. [2022-11-19 08:08:08,766 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 10726 transitions. Word has length 17 [2022-11-19 08:08:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:08,766 INFO L495 AbstractCegarLoop]: Abstraction has 2789 states and 10726 transitions. [2022-11-19 08:08:08,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 10726 transitions. [2022-11-19 08:08:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:08:08,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:08,768 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:08,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:08,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:08:09,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-19 08:08:09,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:08:09,378 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:08:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash -317001667, now seen corresponding path program 3 times [2022-11-19 08:08:09,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:08:09,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869984245] [2022-11-19 08:08:09,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:08:09,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:08:09,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:08:09,380 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:08:09,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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 08:08:09,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:08:09,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:08:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:09,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:08:09,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:08:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:08:09,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 08:08:09,999 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:08:09,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:08:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:08:10,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:11,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:08:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:08:11,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:08:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869984245] [2022-11-19 08:08:11,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869984245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314877377] [2022-11-19 08:08:11,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:08:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:08:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:08:11,969 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:08:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-19 08:08:12,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:08:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:12,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:08:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:08:13,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:08:14,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314877377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:14,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377900959] [2022-11-19 08:08:14,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:08:14,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:14,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:14,055 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:14,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-19 08:08:14,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:08:14,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:08:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:08:14,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:08:15,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377900959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:15,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:08:15,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 7, 7, 7] total 32 [2022-11-19 08:08:15,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724829516] [2022-11-19 08:08:15,067 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:08:15,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:08:15,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:08:15,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:08:15,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:08:15,069 INFO L87 Difference]: Start difference. First operand 2789 states and 10726 transitions. Second operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:33,770 INFO L93 Difference]: Finished difference Result 3719 states and 14118 transitions. [2022-11-19 08:08:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 08:08:33,773 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 08:08:33,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:33,782 INFO L225 Difference]: With dead ends: 3719 [2022-11-19 08:08:33,782 INFO L226 Difference]: Without dead ends: 3719 [2022-11-19 08:08:33,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=842, Invalid=3988, Unknown=0, NotChecked=0, Total=4830 [2022-11-19 08:08:33,783 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1470 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:33,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1470 Valid, 348 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2217 Invalid, 0 Unknown, 234 Unchecked, 12.0s Time] [2022-11-19 08:08:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2022-11-19 08:08:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 2739. [2022-11-19 08:08:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2720 states have (on average 4.017647058823529) internal successors, (10928), 2738 states have internal predecessors, (10928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 10928 transitions. [2022-11-19 08:08:33,852 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 10928 transitions. Word has length 17 [2022-11-19 08:08:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:33,852 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 10928 transitions. [2022-11-19 08:08:33,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 10928 transitions. [2022-11-19 08:08:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:08:33,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:33,853 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:33,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:08:34,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-11-19 08:08:34,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-19 08:08:34,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:34,463 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:08:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1236293412, now seen corresponding path program 2 times [2022-11-19 08:08:34,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:08:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714014562] [2022-11-19 08:08:34,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:08:34,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:08:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:08:34,465 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:08:34,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-19 08:08:34,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:08:34,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:34,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:08:34,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:35,003 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:08:35,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:08:35,174 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:08:35,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:08:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:08:35,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:08:35,323 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:08:35,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:08:35,419 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:08:35,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:08:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:08:35,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:08:35,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:08:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714014562] [2022-11-19 08:08:35,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714014562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:35,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:35,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782006262] [2022-11-19 08:08:35,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:08:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:08:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:08:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:08:35,573 INFO L87 Difference]: Start difference. First operand 2739 states and 10928 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 08:08:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:36,121 INFO L93 Difference]: Finished difference Result 3311 states and 12346 transitions. [2022-11-19 08:08:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:08:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 18 [2022-11-19 08:08:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:36,131 INFO L225 Difference]: With dead ends: 3311 [2022-11-19 08:08:36,131 INFO L226 Difference]: Without dead ends: 3311 [2022-11-19 08:08:36,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 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 08:08:36,131 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 82 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:36,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 7 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:08:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2022-11-19 08:08:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2739. [2022-11-19 08:08:36,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2720 states have (on average 3.9154411764705883) internal successors, (10650), 2738 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 10650 transitions. [2022-11-19 08:08:36,194 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 10650 transitions. Word has length 18 [2022-11-19 08:08:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:36,194 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 10650 transitions. [2022-11-19 08:08:36,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 08:08:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 10650 transitions. [2022-11-19 08:08:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:08:36,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:36,196 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:36,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:36,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:08:36,408 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:08:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1236293662, now seen corresponding path program 2 times [2022-11-19 08:08:36,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:08:36,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401784675] [2022-11-19 08:08:36,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:08:36,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:08:36,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:08:36,410 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:08:36,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-19 08:08:36,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:08:36,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:36,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:08:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:36,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:08:36,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:08:36,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:08:36,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:08:36,926 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:08:36,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:08:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:08:37,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:08:37,089 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:08:37,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401784675] [2022-11-19 08:08:37,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401784675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:37,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:37,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:08:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255028463] [2022-11-19 08:08:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:37,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:08:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:08:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:08:37,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:08:37,091 INFO L87 Difference]: Start difference. First operand 2739 states and 10650 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:08:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:37,660 INFO L93 Difference]: Finished difference Result 3033 states and 11238 transitions. [2022-11-19 08:08:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:08:37,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 18 [2022-11-19 08:08:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:37,668 INFO L225 Difference]: With dead ends: 3033 [2022-11-19 08:08:37,668 INFO L226 Difference]: Without dead ends: 3033 [2022-11-19 08:08:37,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:08:37,669 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 113 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:37,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 7 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:08:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2022-11-19 08:08:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2551. [2022-11-19 08:08:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2532 states have (on average 3.8641390205371247) internal successors, (9784), 2550 states have internal predecessors, (9784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 9784 transitions. [2022-11-19 08:08:37,731 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 9784 transitions. Word has length 18 [2022-11-19 08:08:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:37,731 INFO L495 AbstractCegarLoop]: Abstraction has 2551 states and 9784 transitions. [2022-11-19 08:08:37,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:08:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 9784 transitions. [2022-11-19 08:08:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:08:37,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:37,732 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 1, 1, 1] [2022-11-19 08:08:37,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:37,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:08:37,933 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:08:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash 789001123, now seen corresponding path program 2 times [2022-11-19 08:08:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:08:37,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955732674] [2022-11-19 08:08:37,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:08:37,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:08:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:08:37,935 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:08:37,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-19 08:08:38,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:08:38,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:08:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:38,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:08:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:08:39,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:43,432 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:08:43,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955732674] [2022-11-19 08:08:43,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955732674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:43,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1413788330] [2022-11-19 08:08:43,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:08:43,432 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:08:43,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:08:43,433 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:08:43,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-19 08:08:44,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:08:44,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:08:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:08:44,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:08:46,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1413788330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:46,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762178378] [2022-11-19 08:08:46,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:08:46,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:46,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:46,638 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:46,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-19 08:08:47,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:08:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:47,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:08:47,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:08:48,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:08:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762178378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:49,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:08:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 9, 9, 9, 9] total 52 [2022-11-19 08:08:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356419096] [2022-11-19 08:08:49,332 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:08:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-19 08:08:49,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:08:49,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-19 08:08:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2480, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:08:49,333 INFO L87 Difference]: Start difference. First operand 2551 states and 9784 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:01,518 INFO L93 Difference]: Finished difference Result 9466 states and 37178 transitions. [2022-11-19 08:10:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 08:10:01,520 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:10:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:01,545 INFO L225 Difference]: With dead ends: 9466 [2022-11-19 08:10:01,546 INFO L226 Difference]: Without dead ends: 9466 [2022-11-19 08:10:01,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=1132, Invalid=6700, Unknown=0, NotChecked=0, Total=7832 [2022-11-19 08:10:01,548 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1740 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 3673 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1740 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 4270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 3673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:01,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1740 Valid, 414 Invalid, 4270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 3673 Invalid, 0 Unknown, 120 Unchecked, 30.1s Time] [2022-11-19 08:10:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9466 states. [2022-11-19 08:10:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9466 to 2564. [2022-11-19 08:10:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2545 states have (on average 3.851080550098232) internal successors, (9801), 2563 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 9801 transitions. [2022-11-19 08:10:01,636 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 9801 transitions. Word has length 18 [2022-11-19 08:10:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:01,637 INFO L495 AbstractCegarLoop]: Abstraction has 2564 states and 9801 transitions. [2022-11-19 08:10:01,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 9801 transitions. [2022-11-19 08:10:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:10:01,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:01,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:01,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-19 08:10:01,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 0 [2022-11-19 08:10:02,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:02,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:02,239 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:10:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash -813611155, now seen corresponding path program 2 times [2022-11-19 08:10:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:10:02,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990813395] [2022-11-19 08:10:02,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:10:02,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:10:02,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:10:02,240 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:10:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-19 08:10:02,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:10:02,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:02,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:10:02,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:02,909 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:10:02,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:10:03,079 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:10:03,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:10:03,221 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:10:03,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:10:03,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:10:03,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:03,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:10:03,322 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:10:03,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:10:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:10:03,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:10:04,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:10:04,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990813395] [2022-11-19 08:10:04,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990813395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:04,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [900557849] [2022-11-19 08:10:04,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:10:04,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:10:04,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:10:04,862 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:10:04,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2022-11-19 08:10:05,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:10:05,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:05,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:10:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:05,978 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:10:05,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:10:06,140 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:10:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:10:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:06,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:10:06,470 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:10:06,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:10:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:06,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:10:06,600 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:10:06,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:10:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:10:06,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:10:17,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [900557849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:17,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837205704] [2022-11-19 08:10:17,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:10:17,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:17,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:17,876 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-19 08:10:18,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:10:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:18,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 08:10:18,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:18,552 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:10:18,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:10:18,715 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:10:18,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:10:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:19,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:10:19,152 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:10:19,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:10:19,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:19,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:10:19,415 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 08:10:19,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:10:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:10:19,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:10:27,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837205704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:27,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:10:27,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 7, 7] total 34 [2022-11-19 08:10:27,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185449652] [2022-11-19 08:10:27,204 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:27,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 08:10:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:10:27,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 08:10:27,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1098, Unknown=3, NotChecked=0, Total=1260 [2022-11-19 08:10:27,205 INFO L87 Difference]: Start difference. First operand 2564 states and 9801 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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 08:10:50,517 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 55 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:11:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:03,229 INFO L93 Difference]: Finished difference Result 7253 states and 31748 transitions. [2022-11-19 08:11:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-19 08:11:03,231 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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 18 [2022-11-19 08:11:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:03,269 INFO L225 Difference]: With dead ends: 7253 [2022-11-19 08:11:03,270 INFO L226 Difference]: Without dead ends: 7253 [2022-11-19 08:11:03,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 76 SyntacticMatches, 20 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=879, Invalid=5924, Unknown=3, NotChecked=0, Total=6806 [2022-11-19 08:11:03,274 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1028 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2050 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:03,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 525 Invalid, 3592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1493 Invalid, 0 Unknown, 2050 Unchecked, 6.4s Time] [2022-11-19 08:11:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2022-11-19 08:11:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 3812. [2022-11-19 08:11:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3793 states have (on average 4.561560769839177) internal successors, (17302), 3811 states have internal predecessors, (17302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 17302 transitions. [2022-11-19 08:11:03,461 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 17302 transitions. Word has length 18 [2022-11-19 08:11:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:03,461 INFO L495 AbstractCegarLoop]: Abstraction has 3812 states and 17302 transitions. [2022-11-19 08:11:03,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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 08:11:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 17302 transitions. [2022-11-19 08:11:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:11:03,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:03,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:03,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:03,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-11-19 08:11:03,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (100)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:04,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:11:04,075 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:11:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash -813610730, now seen corresponding path program 1 times [2022-11-19 08:11:04,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:11:04,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388362332] [2022-11-19 08:11:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:04,076 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 08:11:04,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:11:04,077 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:11:04,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-19 08:11:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:11:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:04,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:05,165 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 27 treesize of output 23 [2022-11-19 08:11:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:05,432 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:11:05,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388362332] [2022-11-19 08:11:05,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388362332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:05,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377278179] [2022-11-19 08:11:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:05,432 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:11:05,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:11:05,433 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:11:05,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-19 08:11:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:11:06,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:06,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:11:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:07,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:07,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [377278179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:07,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132741594] [2022-11-19 08:11:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:07,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:07,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:07,897 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:07,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-19 08:11:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:08,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:11:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:08,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:11:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:09,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132741594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:10,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:11:10,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8, 7, 7] total 35 [2022-11-19 08:11:10,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736496544] [2022-11-19 08:11:10,006 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:11:10,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 08:11:10,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:11:10,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 08:11:10,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:11:10,008 INFO L87 Difference]: Start difference. First operand 3812 states and 17302 transitions. Second operand has 36 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:17,008 INFO L93 Difference]: Finished difference Result 3936 states and 17635 transitions. [2022-11-19 08:11:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 08:11:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:11:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:17,021 INFO L225 Difference]: With dead ends: 3936 [2022-11-19 08:11:17,021 INFO L226 Difference]: Without dead ends: 3936 [2022-11-19 08:11:17,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=521, Invalid=3019, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 08:11:17,022 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 310 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:17,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 211 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 526 Invalid, 0 Unknown, 179 Unchecked, 2.6s Time] [2022-11-19 08:11:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2022-11-19 08:11:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3870. [2022-11-19 08:11:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3851 states have (on average 4.547390288236822) internal successors, (17512), 3869 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 17512 transitions. [2022-11-19 08:11:17,103 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 17512 transitions. Word has length 18 [2022-11-19 08:11:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:17,103 INFO L495 AbstractCegarLoop]: Abstraction has 3870 states and 17512 transitions. [2022-11-19 08:11:17,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 17512 transitions. [2022-11-19 08:11:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:11:17,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:17,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:17,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-11-19 08:11:17,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:17,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2022-11-19 08:11:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:11:17,705 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:11:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash -813610905, now seen corresponding path program 1 times [2022-11-19 08:11:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:11:17,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49137090] [2022-11-19 08:11:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:17,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:11:17,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:11:17,707 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:11:17,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-19 08:11:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:11:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:18,545 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:11:18,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:11:18,696 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:11:18,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 08:11:18,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:11:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:18,874 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:11:18,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-19 08:11:18,894 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:11:18,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:11:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:19,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:19,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:11:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:20,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:11:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49137090] [2022-11-19 08:11:20,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49137090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:20,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1490817709] [2022-11-19 08:11:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:20,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:11:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:11:20,461 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:11:20,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-19 08:11:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:11:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:22,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:11:22,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:11:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:22,213 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:11:22,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-19 08:11:22,233 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:11:22,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:11:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:22,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:23,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:11:24,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1490817709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179201214] [2022-11-19 08:11:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:24,326 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:24,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc5e815-b97d-4a67-964d-82efd03d722c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-19 08:11:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:11:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:25,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:11:25,429 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-19 08:11:25,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:11:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:11:26,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:11:34,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179201214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:34,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:11:34,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 11, 10] total 37 [2022-11-19 08:11:34,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064022853] [2022-11-19 08:11:34,746 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:11:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 08:11:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:11:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 08:11:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1198, Unknown=1, NotChecked=0, Total=1406 [2022-11-19 08:11:34,746 INFO L87 Difference]: Start difference. First operand 3870 states and 17512 transitions. Second operand has 38 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 38 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)