./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/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_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/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_9badb39c-66ae-4f15-bd50-e6ca7461048f/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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- 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 06:52:16,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:52:16,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:52:16,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:52:16,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:52:16,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:52:16,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:52:16,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:52:16,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:52:16,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:52:16,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:52:16,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:52:16,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:52:16,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:52:16,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:52:16,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:52:16,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:52:16,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:52:16,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:52:16,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:52:16,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:52:16,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:52:16,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:52:16,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:52:16,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:52:16,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:52:16,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:52:16,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:52:16,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:52:16,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:52:16,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:52:16,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:52:16,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:52:16,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:52:16,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:52:16,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:52:16,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:52:16,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:52:16,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:52:16,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:52:16,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:52:16,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 06:52:16,279 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:52:16,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:52:16,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:52:16,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:52:16,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:52:16,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:52:16,283 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:52:16,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:52:16,284 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:52:16,284 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:52:16,285 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:52:16,286 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:52:16,286 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:52:16,286 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:52:16,287 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:52:16,287 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:52:16,287 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:52:16,288 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:52:16,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:52:16,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:52:16,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:52:16,289 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:52:16,290 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:52:16,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:52:16,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:52:16,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:52:16,293 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:52:16,293 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:52:16,293 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:52:16,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:52:16,294 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:52:16,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:52:16,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:52:16,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:52:16,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:52:16,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:52:16,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:52:16,296 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:52:16,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:52:16,297 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:52:16,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:52:16,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:52:16,298 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_9badb39c-66ae-4f15-bd50-e6ca7461048f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-11-19 06:52:16,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:52:16,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:52:16,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:52:16,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:52:16,753 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:52:16,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-19 06:52:16,873 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/fb50b80d6/8d7ebd998cd64e568be966a1d73c4770/FLAG29f5c6a6e [2022-11-19 06:52:17,547 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:52:17,547 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-19 06:52:17,559 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/fb50b80d6/8d7ebd998cd64e568be966a1d73c4770/FLAG29f5c6a6e [2022-11-19 06:52:17,878 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/fb50b80d6/8d7ebd998cd64e568be966a1d73c4770 [2022-11-19 06:52:17,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:52:17,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:52:17,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:17,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:52:17,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:52:17,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:17" (1/1) ... [2022-11-19 06:52:17,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654b5d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:17, skipping insertion in model container [2022-11-19 06:52:17,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:17" (1/1) ... [2022-11-19 06:52:17,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:52:17,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:52:18,260 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_9badb39c-66ae-4f15-bd50-e6ca7461048f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-19 06:52:18,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:18,285 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 06:52:18,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54ea0d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:18, skipping insertion in model container [2022-11-19 06:52:18,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:18,286 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 06:52:18,289 INFO L158 Benchmark]: Toolchain (without parser) took 404.11ms. Allocated memory is still 144.7MB. Free memory was 110.6MB in the beginning and 120.7MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:52:18,290 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 96.5MB. Free memory was 71.4MB in the beginning and 71.3MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:52:18,291 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.99ms. Allocated memory is still 144.7MB. Free memory was 110.2MB in the beginning and 120.7MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:52:18,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 96.5MB. Free memory was 71.4MB in the beginning and 71.3MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.99ms. Allocated memory is still 144.7MB. Free memory was 110.2MB in the beginning and 120.7MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/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_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/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_9badb39c-66ae-4f15-bd50-e6ca7461048f/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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- 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 06:52:20,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:52:20,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:52:20,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:52:20,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:52:20,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:52:20,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:52:20,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:52:20,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:52:20,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:52:20,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:52:20,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:52:20,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:52:20,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:52:20,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:52:20,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:52:20,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:52:20,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:52:20,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:52:21,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:52:21,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:52:21,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:52:21,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:52:21,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:52:21,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:52:21,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:52:21,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:52:21,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:52:21,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:52:21,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:52:21,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:52:21,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:52:21,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:52:21,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:52:21,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:52:21,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:52:21,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:52:21,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:52:21,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:52:21,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:52:21,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:52:21,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 06:52:21,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:52:21,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:52:21,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:52:21,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:52:21,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:52:21,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:52:21,105 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:52:21,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:52:21,105 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:52:21,106 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:52:21,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:52:21,106 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:52:21,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:52:21,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:52:21,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:52:21,108 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:52:21,109 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:52:21,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:52:21,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:52:21,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:52:21,110 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:52:21,110 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:52:21,110 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:52:21,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:52:21,111 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:52:21,111 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 06:52:21,112 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 06:52:21,112 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:52:21,112 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:52:21,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:52:21,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 06:52:21,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:52:21,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:52:21,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:52:21,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:52:21,115 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 06:52:21,115 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 06:52:21,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:52:21,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 06:52:21,116 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_9badb39c-66ae-4f15-bd50-e6ca7461048f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-11-19 06:52:21,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:52:21,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:52:21,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:52:21,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:52:21,634 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:52:21,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-19 06:52:21,740 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/8a9599aa5/a62f3c5e70d94638a712f0af52addb0b/FLAGb1fd361aa [2022-11-19 06:52:22,414 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:52:22,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-19 06:52:22,434 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/8a9599aa5/a62f3c5e70d94638a712f0af52addb0b/FLAGb1fd361aa [2022-11-19 06:52:22,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/data/8a9599aa5/a62f3c5e70d94638a712f0af52addb0b [2022-11-19 06:52:22,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:52:22,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:52:22,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:22,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:52:22,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:52:22,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:22" (1/1) ... [2022-11-19 06:52:22,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdad615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:22, skipping insertion in model container [2022-11-19 06:52:22,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:22" (1/1) ... [2022-11-19 06:52:22,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:52:22,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:52:23,192 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_9badb39c-66ae-4f15-bd50-e6ca7461048f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-19 06:52:23,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:23,263 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 06:52:23,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:52:23,313 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_9badb39c-66ae-4f15-bd50-e6ca7461048f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-19 06:52:23,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:23,339 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:52:23,379 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_9badb39c-66ae-4f15-bd50-e6ca7461048f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-19 06:52:23,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:23,417 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:52:23,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23 WrapperNode [2022-11-19 06:52:23,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:23,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:52:23,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:52:23,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:52:23,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,497 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 186 [2022-11-19 06:52:23,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:52:23,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:52:23,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:52:23,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:52:23,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,540 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:52:23,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:52:23,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:52:23,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:52:23,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (1/1) ... [2022-11-19 06:52:23,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:52:23,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:23,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:52:23,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:52:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:52:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 06:52:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:52:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 06:52:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 06:52:23,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 06:52:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 06:52:23,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 06:52:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 06:52:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 06:52:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:52:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:52:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:52:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:52:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 06:52:23,643 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 06:52:23,826 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:52:23,829 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:52:24,690 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:52:24,883 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:52:24,884 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 06:52:24,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:52:24 BoogieIcfgContainer [2022-11-19 06:52:24,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:52:24,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:52:24,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:52:24,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:52:24,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:52:22" (1/3) ... [2022-11-19 06:52:24,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e82cb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:52:24, skipping insertion in model container [2022-11-19 06:52:24,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:23" (2/3) ... [2022-11-19 06:52:24,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e82cb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:52:24, skipping insertion in model container [2022-11-19 06:52:24,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:52:24" (3/3) ... [2022-11-19 06:52:24,897 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2022-11-19 06:52:24,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:52:24,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-19 06:52:24,920 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 06:52:25,076 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-19 06:52:25,143 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:52:25,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 212 transitions, 440 flow [2022-11-19 06:52:25,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 212 transitions, 440 flow [2022-11-19 06:52:25,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 212 transitions, 440 flow [2022-11-19 06:52:25,357 INFO L130 PetriNetUnfolder]: 15/210 cut-off events. [2022-11-19 06:52:25,357 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-19 06:52:25,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 15/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-19 06:52:25,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2022-11-19 06:53:06,451 INFO L134 LiptonReduction]: Checked pairs total: 3090 [2022-11-19 06:53:06,452 INFO L136 LiptonReduction]: Total number of compositions: 243 [2022-11-19 06:53:06,462 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 50 transitions, 116 flow [2022-11-19 06:53:06,511 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:06,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:53:06,542 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;@31652c87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:53:06,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-19 06:53:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:53:06,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:06,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:53:06,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash 28392, now seen corresponding path program 1 times [2022-11-19 06:53:06,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:06,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065697386] [2022-11-19 06:53:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:06,577 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 06:53:06,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:06,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:06,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:53:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:06,914 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:53:06,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:53:06,966 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 06:53:06,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:06,967 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065697386] [2022-11-19 06:53:06,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065697386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:06,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:06,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111677266] [2022-11-19 06:53:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:06,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:07,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:07,055 INFO L87 Difference]: Start difference. First operand has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 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 06:53:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:07,464 INFO L93 Difference]: Finished difference Result 295 states and 770 transitions. [2022-11-19 06:53:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:07,467 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 06:53:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:07,500 INFO L225 Difference]: With dead ends: 295 [2022-11-19 06:53:07,500 INFO L226 Difference]: Without dead ends: 295 [2022-11-19 06:53:07,501 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 06:53:07,510 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:07,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:53:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-19 06:53:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-11-19 06:53:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 207 states have (on average 3.7198067632850242) internal successors, (770), 294 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 770 transitions. [2022-11-19 06:53:07,623 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 770 transitions. Word has length 2 [2022-11-19 06:53:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:07,624 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 770 transitions. [2022-11-19 06:53:07,624 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 06:53:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 770 transitions. [2022-11-19 06:53:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:53:07,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:07,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:53:07,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:07,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:07,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash 28393, now seen corresponding path program 1 times [2022-11-19 06:53:07,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:07,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739210373] [2022-11-19 06:53:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:53:07,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:07,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:07,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:07,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:53:07,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:08,033 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:08,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:08,071 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 06:53:08,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:08,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:08,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739210373] [2022-11-19 06:53:08,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739210373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:08,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:08,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847544595] [2022-11-19 06:53:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:08,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:08,103 INFO L87 Difference]: Start difference. First operand 295 states and 770 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 06:53:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:08,562 INFO L93 Difference]: Finished difference Result 298 states and 774 transitions. [2022-11-19 06:53:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:08,563 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 06:53:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:08,565 INFO L225 Difference]: With dead ends: 298 [2022-11-19 06:53:08,566 INFO L226 Difference]: Without dead ends: 298 [2022-11-19 06:53:08,566 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 06:53:08,567 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:08,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:53:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-19 06:53:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-11-19 06:53:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 209 states have (on average 3.7033492822966507) internal successors, (774), 296 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 774 transitions. [2022-11-19 06:53:08,590 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 774 transitions. Word has length 2 [2022-11-19 06:53:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:08,591 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 774 transitions. [2022-11-19 06:53:08,591 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 06:53:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 774 transitions. [2022-11-19 06:53:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:53:08,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:08,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:53:08,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:08,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 887672, now seen corresponding path program 1 times [2022-11-19 06:53:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310701186] [2022-11-19 06:53:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:08,812 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 06:53:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:08,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:08,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 06:53:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:08,964 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 06:53:08,994 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 06:53:08,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:08,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310701186] [2022-11-19 06:53:08,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310701186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:08,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:08,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:53:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694664917] [2022-11-19 06:53:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:08,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:09,001 INFO L87 Difference]: Start difference. First operand 297 states and 774 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:09,341 INFO L93 Difference]: Finished difference Result 296 states and 772 transitions. [2022-11-19 06:53:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 06:53:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:09,345 INFO L225 Difference]: With dead ends: 296 [2022-11-19 06:53:09,346 INFO L226 Difference]: Without dead ends: 296 [2022-11-19 06:53:09,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:09,347 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:09,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:53:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-19 06:53:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-11-19 06:53:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 209 states have (on average 3.6937799043062203) internal successors, (772), 295 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 772 transitions. [2022-11-19 06:53:09,387 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 772 transitions. Word has length 3 [2022-11-19 06:53:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:09,389 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 772 transitions. [2022-11-19 06:53:09,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 772 transitions. [2022-11-19 06:53:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:53:09,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:09,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:53:09,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:09,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:09,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:09,613 INFO L85 PathProgramCache]: Analyzing trace with hash 886504, now seen corresponding path program 1 times [2022-11-19 06:53:09,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:09,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581799742] [2022-11-19 06:53:09,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:09,614 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 06:53:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:09,615 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:09,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 06:53:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:53:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:09,826 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:09,826 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:09,938 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 06:53:09,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:10,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:10,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581799742] [2022-11-19 06:53:10,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581799742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1965387722] [2022-11-19 06:53:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:53:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:53:10,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:53:10,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-19 06:53:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:10,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:53:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:10,556 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:10,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:10,614 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 06:53:10,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:10,721 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 06:53:10,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1965387722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:10,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894374650] [2022-11-19 06:53:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:10,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:10,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:10,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:53:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:53:10,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:10,935 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:10,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:11,010 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 06:53:11,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:11,226 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 06:53:11,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894374650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:11,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:53:11,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 06:53:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672278493] [2022-11-19 06:53:11,228 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:53:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:53:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:53:11,229 INFO L87 Difference]: Start difference. First operand 296 states and 772 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 06:53:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:13,809 INFO L93 Difference]: Finished difference Result 591 states and 1550 transitions. [2022-11-19 06:53:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:53:13,811 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 06:53:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:13,816 INFO L225 Difference]: With dead ends: 591 [2022-11-19 06:53:13,816 INFO L226 Difference]: Without dead ends: 591 [2022-11-19 06:53:13,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:53:13,817 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 207 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:13,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 3 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 06:53:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-19 06:53:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 302. [2022-11-19 06:53:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 215 states have (on average 3.6744186046511627) internal successors, (790), 301 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 790 transitions. [2022-11-19 06:53:13,855 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 790 transitions. Word has length 3 [2022-11-19 06:53:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:13,855 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 790 transitions. [2022-11-19 06:53:13,856 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 06:53:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 790 transitions. [2022-11-19 06:53:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 06:53:13,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:13,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 06:53:13,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:14,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:14,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 06:53:14,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:14,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash 27517414, now seen corresponding path program 1 times [2022-11-19 06:53:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:14,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807903763] [2022-11-19 06:53:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:14,467 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 06:53:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:14,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:14,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:53:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:14,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:14,703 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:53:14,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 06:53:14,730 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 06:53:14,852 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 06:53:14,852 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 06:53:15,073 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 06:53:15,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:15,671 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 06:53:15,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:15,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807903763] [2022-11-19 06:53:15,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807903763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:15,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1682582976] [2022-11-19 06:53:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:15,672 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:53:15,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:53:15,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:53:15,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 06:53:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:53:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:15,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,024 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:53:16,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 06:53:16,044 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 06:53:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,147 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 06:53:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:16,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:16,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1682582976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:16,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:16,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 7 [2022-11-19 06:53:16,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922990247] [2022-11-19 06:53:16,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:16,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:16,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:53:16,189 INFO L87 Difference]: Start difference. First operand 302 states and 790 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 06:53:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:16,524 INFO L93 Difference]: Finished difference Result 246 states and 616 transitions. [2022-11-19 06:53:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:16,526 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 06:53:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:16,528 INFO L225 Difference]: With dead ends: 246 [2022-11-19 06:53:16,528 INFO L226 Difference]: Without dead ends: 246 [2022-11-19 06:53:16,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:53:16,529 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:16,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 06:53:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-19 06:53:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-11-19 06:53:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 181 states have (on average 3.403314917127072) internal successors, (616), 245 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 616 transitions. [2022-11-19 06:53:16,540 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 616 transitions. Word has length 4 [2022-11-19 06:53:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:16,541 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 616 transitions. [2022-11-19 06:53:16,541 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 06:53:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 616 transitions. [2022-11-19 06:53:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 06:53:16,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:16,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 06:53:16,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-19 06:53:16,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:16,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:16,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash 27517418, now seen corresponding path program 1 times [2022-11-19 06:53:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:16,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523785377] [2022-11-19 06:53:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:16,949 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 06:53:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:16,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:16,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 06:53:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:53:17,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:17,174 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 06:53:17,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-19 06:53:17,243 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:53:17,244 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 06:53:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:17,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:17,275 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523785377] [2022-11-19 06:53:17,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523785377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:17,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:17,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:17,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576477651] [2022-11-19 06:53:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:17,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:17,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:17,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:17,277 INFO L87 Difference]: Start difference. First operand 246 states and 616 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:17,494 INFO L93 Difference]: Finished difference Result 251 states and 626 transitions. [2022-11-19 06:53:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 06:53:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:17,497 INFO L225 Difference]: With dead ends: 251 [2022-11-19 06:53:17,497 INFO L226 Difference]: Without dead ends: 251 [2022-11-19 06:53:17,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 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 06:53:17,498 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:17,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-19 06:53:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-19 06:53:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-11-19 06:53:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 186 states have (on average 3.3655913978494625) internal successors, (626), 250 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 626 transitions. [2022-11-19 06:53:17,512 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 626 transitions. Word has length 4 [2022-11-19 06:53:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:17,513 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 626 transitions. [2022-11-19 06:53:17,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 626 transitions. [2022-11-19 06:53:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:53:17,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:17,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:53:17,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:17,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:17,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:17,723 INFO L85 PathProgramCache]: Analyzing trace with hash 852162089, now seen corresponding path program 1 times [2022-11-19 06:53:17,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:17,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449907656] [2022-11-19 06:53:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:17,724 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 06:53:17,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:17,725 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:17,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 06:53:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:53:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:18,020 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 06:53:18,020 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-19 06:53:18,121 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:53:18,121 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 06:53:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:53:18,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:18,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449907656] [2022-11-19 06:53:18,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449907656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:18,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:18,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:18,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173164594] [2022-11-19 06:53:18,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:18,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:18,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:18,183 INFO L87 Difference]: Start difference. First operand 251 states and 626 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:18,369 INFO L93 Difference]: Finished difference Result 250 states and 622 transitions. [2022-11-19 06:53:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 06:53:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:18,372 INFO L225 Difference]: With dead ends: 250 [2022-11-19 06:53:18,372 INFO L226 Difference]: Without dead ends: 250 [2022-11-19 06:53:18,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 06:53:18,373 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:18,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-19 06:53:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-19 06:53:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2022-11-19 06:53:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 181 states have (on average 3.3812154696132595) internal successors, (612), 244 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 612 transitions. [2022-11-19 06:53:18,384 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 612 transitions. Word has length 5 [2022-11-19 06:53:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:18,385 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 612 transitions. [2022-11-19 06:53:18,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 612 transitions. [2022-11-19 06:53:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:53:18,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:18,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:53:18,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:18,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:18,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash 674453872, now seen corresponding path program 1 times [2022-11-19 06:53:18,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:18,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639798279] [2022-11-19 06:53:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:18,613 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 06:53:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:18,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:18,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:18,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:53:18,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:18,843 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-19 06:53:18,844 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-19 06:53:18,893 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:53:18,893 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 06:53:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:18,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:18,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:18,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639798279] [2022-11-19 06:53:18,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639798279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:18,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:18,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775482770] [2022-11-19 06:53:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:18,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:18,918 INFO L87 Difference]: Start difference. First operand 245 states and 612 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:19,176 INFO L93 Difference]: Finished difference Result 229 states and 579 transitions. [2022-11-19 06:53:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:19,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:53:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:19,179 INFO L225 Difference]: With dead ends: 229 [2022-11-19 06:53:19,179 INFO L226 Difference]: Without dead ends: 229 [2022-11-19 06:53:19,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 06:53:19,180 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:19,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:53:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-19 06:53:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-11-19 06:53:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 175 states have (on average 3.3085714285714287) internal successors, (579), 228 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 579 transitions. [2022-11-19 06:53:19,191 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 579 transitions. Word has length 6 [2022-11-19 06:53:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 579 transitions. [2022-11-19 06:53:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 579 transitions. [2022-11-19 06:53:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:53:19,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:19,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:53:19,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:19,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:19,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash 674453778, now seen corresponding path program 1 times [2022-11-19 06:53:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:19,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209106867] [2022-11-19 06:53:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:19,408 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 06:53:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:19,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:19,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:53:19,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:19,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:19,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:19,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209106867] [2022-11-19 06:53:19,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209106867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:19,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:19,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:53:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783285966] [2022-11-19 06:53:19,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:19,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:19,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:19,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:19,551 INFO L87 Difference]: Start difference. First operand 229 states and 579 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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 06:53:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:19,837 INFO L93 Difference]: Finished difference Result 193 states and 487 transitions. [2022-11-19 06:53:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:19,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 06:53:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:19,839 INFO L225 Difference]: With dead ends: 193 [2022-11-19 06:53:19,840 INFO L226 Difference]: Without dead ends: 193 [2022-11-19 06:53:19,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:19,841 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:19,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:53:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-19 06:53:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-19 06:53:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 153 states have (on average 3.183006535947712) internal successors, (487), 192 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 487 transitions. [2022-11-19 06:53:19,850 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 487 transitions. Word has length 6 [2022-11-19 06:53:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:19,850 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 487 transitions. [2022-11-19 06:53:19,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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 06:53:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 487 transitions. [2022-11-19 06:53:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:53:19,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:19,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:53:19,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:20,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:20,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:20,067 INFO L85 PathProgramCache]: Analyzing trace with hash 674453779, now seen corresponding path program 1 times [2022-11-19 06:53:20,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:20,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388072376] [2022-11-19 06:53:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:20,068 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 06:53:20,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:20,069 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:20,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:53:20,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:20,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:20,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:20,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388072376] [2022-11-19 06:53:20,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388072376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:20,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:20,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854379043] [2022-11-19 06:53:20,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:20,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:53:20,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:53:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:20,279 INFO L87 Difference]: Start difference. First operand 193 states and 487 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:20,789 INFO L93 Difference]: Finished difference Result 336 states and 859 transitions. [2022-11-19 06:53:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:53:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:53:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:20,793 INFO L225 Difference]: With dead ends: 336 [2022-11-19 06:53:20,793 INFO L226 Difference]: Without dead ends: 336 [2022-11-19 06:53:20,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:20,794 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:20,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:53:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-19 06:53:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 229. [2022-11-19 06:53:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 189 states have (on average 3.4444444444444446) internal successors, (651), 228 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 651 transitions. [2022-11-19 06:53:20,807 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 651 transitions. Word has length 6 [2022-11-19 06:53:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:20,807 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 651 transitions. [2022-11-19 06:53:20,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 651 transitions. [2022-11-19 06:53:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:53:20,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:20,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:53:20,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:21,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:21,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash 674453880, now seen corresponding path program 1 times [2022-11-19 06:53:21,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:21,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996060687] [2022-11-19 06:53:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:21,028 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 06:53:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:21,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:21,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:53:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:21,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:21,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:21,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996060687] [2022-11-19 06:53:21,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996060687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:21,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:21,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:53:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447649892] [2022-11-19 06:53:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:21,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:21,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:53:21,258 INFO L87 Difference]: Start difference. First operand 229 states and 651 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 06:53:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:21,752 INFO L93 Difference]: Finished difference Result 319 states and 853 transitions. [2022-11-19 06:53:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:53:21,753 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 06:53:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:21,756 INFO L225 Difference]: With dead ends: 319 [2022-11-19 06:53:21,756 INFO L226 Difference]: Without dead ends: 319 [2022-11-19 06:53:21,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:53:21,757 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:21,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:53:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-19 06:53:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 293. [2022-11-19 06:53:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 253 states have (on average 3.2292490118577075) internal successors, (817), 292 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 817 transitions. [2022-11-19 06:53:21,771 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 817 transitions. Word has length 6 [2022-11-19 06:53:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:21,772 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 817 transitions. [2022-11-19 06:53:21,772 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 06:53:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 817 transitions. [2022-11-19 06:53:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:53:21,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:21,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:53:21,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:21,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:21,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 674453870, now seen corresponding path program 1 times [2022-11-19 06:53:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792207689] [2022-11-19 06:53:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:21,989 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 06:53:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:21,991 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:22,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:53:22,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:22,243 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:53:22,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 06:53:22,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 06:53:22,331 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 06:53:22,332 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 06:53:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:22,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:23,149 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 06:53:23,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792207689] [2022-11-19 06:53:23,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792207689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901921057] [2022-11-19 06:53:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:23,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:53:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:53:23,151 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:53:23,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-19 06:53:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:23,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:53:23,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:23,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,485 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-19 06:53:23,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-19 06:53:23,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,564 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 06:53:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:23,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901921057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:23,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:23,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 4] total 9 [2022-11-19 06:53:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105911107] [2022-11-19 06:53:23,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:23,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:23,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:53:23,673 INFO L87 Difference]: Start difference. First operand 293 states and 817 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 06:53:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:23,961 INFO L93 Difference]: Finished difference Result 272 states and 765 transitions. [2022-11-19 06:53:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:23,962 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 06:53:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:23,965 INFO L225 Difference]: With dead ends: 272 [2022-11-19 06:53:23,965 INFO L226 Difference]: Without dead ends: 272 [2022-11-19 06:53:23,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:53:23,966 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:23,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 06:53:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-19 06:53:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-11-19 06:53:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 240 states have (on average 3.1875) internal successors, (765), 271 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 765 transitions. [2022-11-19 06:53:23,979 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 765 transitions. Word has length 6 [2022-11-19 06:53:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:23,980 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 765 transitions. [2022-11-19 06:53:23,980 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 06:53:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 765 transitions. [2022-11-19 06:53:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:53:23,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:23,981 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 06:53:24,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:24,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:24,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:53:24,402 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 646313641, now seen corresponding path program 2 times [2022-11-19 06:53:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:24,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526359423] [2022-11-19 06:53:24,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:53:24,403 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 06:53:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:24,404 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:24,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 06:53:24,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:53:24,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:53:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:53:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:24,599 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:24,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:24,810 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 06:53:24,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:25,785 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 06:53:25,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:25,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526359423] [2022-11-19 06:53:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526359423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:25,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1216503917] [2022-11-19 06:53:25,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:53:25,785 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:53:25,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:53:25,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:53:25,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-19 06:53:26,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:53:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:53:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:53:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:26,117 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:26,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:26,244 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 06:53:26,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:26,482 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 06:53:26,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1216503917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:26,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192930427] [2022-11-19 06:53:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:53:26,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:26,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:26,485 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:26,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 06:53:26,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:53:26,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:53:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:53:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:26,759 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:26,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:26,856 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 06:53:26,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:27,093 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 06:53:27,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192930427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:27,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:53:27,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-19 06:53:27,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743796158] [2022-11-19 06:53:27,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:27,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 06:53:27,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:27,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 06:53:27,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:53:27,095 INFO L87 Difference]: Start difference. First operand 272 states and 765 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 06:53:31,201 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 06:53:32,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:53:34,260 WARN L539 Checker$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 06:53:35,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:53:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:39,499 INFO L93 Difference]: Finished difference Result 1556 states and 4458 transitions. [2022-11-19 06:53:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:53:39,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 6 [2022-11-19 06:53:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:39,513 INFO L225 Difference]: With dead ends: 1556 [2022-11-19 06:53:39,513 INFO L226 Difference]: Without dead ends: 1556 [2022-11-19 06:53:39,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:53:39,514 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 426 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 78 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:39,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 23 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 656 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2022-11-19 06:53:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-11-19 06:53:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 286. [2022-11-19 06:53:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 254 states have (on average 3.122047244094488) internal successors, (793), 285 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 793 transitions. [2022-11-19 06:53:39,544 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 793 transitions. Word has length 6 [2022-11-19 06:53:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:39,545 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 793 transitions. [2022-11-19 06:53:39,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 06:53:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 793 transitions. [2022-11-19 06:53:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:53:39,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:39,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:39,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:39,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:39,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:40,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:53:40,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:40,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1410967049, now seen corresponding path program 1 times [2022-11-19 06:53:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:40,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637969409] [2022-11-19 06:53:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:40,163 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 06:53:40,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:40,164 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:53:40,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:40,465 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:53:40,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:53:40,510 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:53:40,510 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 06:53:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:53:40,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:40,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:40,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637969409] [2022-11-19 06:53:40,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637969409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:40,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:40,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:53:40,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259556423] [2022-11-19 06:53:40,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:40,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:53:40,531 INFO L87 Difference]: Start difference. First operand 286 states and 793 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:40,783 INFO L93 Difference]: Finished difference Result 237 states and 636 transitions. [2022-11-19 06:53:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:53:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:53:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:40,786 INFO L225 Difference]: With dead ends: 237 [2022-11-19 06:53:40,787 INFO L226 Difference]: Without dead ends: 237 [2022-11-19 06:53:40,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:40,788 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:40,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:53:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-19 06:53:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-11-19 06:53:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 219 states have (on average 2.904109589041096) internal successors, (636), 236 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 636 transitions. [2022-11-19 06:53:40,799 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 636 transitions. Word has length 7 [2022-11-19 06:53:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:40,799 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 636 transitions. [2022-11-19 06:53:40,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 636 transitions. [2022-11-19 06:53:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:53:40,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:40,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:40,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:41,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:53:41,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:53:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1410967048, now seen corresponding path program 1 times [2022-11-19 06:53:41,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:53:41,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439906341] [2022-11-19 06:53:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:41,017 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 06:53:41,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:53:41,018 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:41,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:53:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:53:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:41,351 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:41,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:41,434 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:53:41,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:53:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:41,579 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 06:53:41,600 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:53:41,600 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 06:53:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:41,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:48,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:53:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439906341] [2022-11-19 06:53:48,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439906341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1758860388] [2022-11-19 06:53:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:48,884 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:53:48,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:53:48,885 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:53:48,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-19 06:53:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:49,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:53:49,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:49,347 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:53:49,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:53:49,458 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:53:49,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:53:49,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:49,715 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 06:53:49,739 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:53:49,740 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 06:53:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:49,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:03,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1758860388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809044013] [2022-11-19 06:54:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:03,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:03,637 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:03,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 06:54:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:54:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:03,900 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:54:03,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:54:04,200 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 06:54:04,201 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 22 [2022-11-19 06:54:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:04,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:11,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809044013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:11,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:54:11,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 18 [2022-11-19 06:54:11,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015879367] [2022-11-19 06:54:11,244 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:11,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:54:11,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:54:11,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:54:11,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=295, Unknown=2, NotChecked=0, Total=380 [2022-11-19 06:54:11,246 INFO L87 Difference]: Start difference. First operand 237 states and 636 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:11,840 INFO L93 Difference]: Finished difference Result 259 states and 680 transitions. [2022-11-19 06:54:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:54:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 06:54:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:11,843 INFO L225 Difference]: With dead ends: 259 [2022-11-19 06:54:11,843 INFO L226 Difference]: Without dead ends: 259 [2022-11-19 06:54:11,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=97, Invalid=363, Unknown=2, NotChecked=0, Total=462 [2022-11-19 06:54:11,845 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:11,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 177 Unchecked, 0.3s Time] [2022-11-19 06:54:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-19 06:54:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-11-19 06:54:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 230 states have (on average 2.860869565217391) internal successors, (658), 247 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 658 transitions. [2022-11-19 06:54:11,856 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 658 transitions. Word has length 7 [2022-11-19 06:54:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:11,856 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 658 transitions. [2022-11-19 06:54:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 658 transitions. [2022-11-19 06:54:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:54:11,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:11,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:11,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:12,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:54:12,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-19 06:54:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:12,462 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:54:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash -389958151, now seen corresponding path program 1 times [2022-11-19 06:54:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:54:12,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386355906] [2022-11-19 06:54:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:12,463 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 06:54:12,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:54:12,464 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:54:12,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:54:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:12,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:54:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:12,628 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 06:54:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:12,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:13,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:54:13,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386355906] [2022-11-19 06:54:13,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386355906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111634404] [2022-11-19 06:54:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:13,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:54:13,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:54:13,783 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:54:13,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 06:54:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:54:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:14,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:14,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111634404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950079560] [2022-11-19 06:54:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:14,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:14,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:14,830 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:14,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 06:54:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:54:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:15,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:15,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950079560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:15,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:54:15,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 17 [2022-11-19 06:54:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754220259] [2022-11-19 06:54:15,191 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:15,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 06:54:15,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:54:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 06:54:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:54:15,192 INFO L87 Difference]: Start difference. First operand 248 states and 658 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:20,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:21,588 INFO L93 Difference]: Finished difference Result 731 states and 1891 transitions. [2022-11-19 06:54:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 06:54:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 06:54:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:21,595 INFO L225 Difference]: With dead ends: 731 [2022-11-19 06:54:21,595 INFO L226 Difference]: Without dead ends: 731 [2022-11-19 06:54:21,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:54:21,597 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 330 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:21,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 0 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 554 Invalid, 0 Unknown, 34 Unchecked, 5.0s Time] [2022-11-19 06:54:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-11-19 06:54:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 572. [2022-11-19 06:54:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 554 states have (on average 2.949458483754513) internal successors, (1634), 571 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1634 transitions. [2022-11-19 06:54:21,623 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1634 transitions. Word has length 8 [2022-11-19 06:54:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:21,624 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 1634 transitions. [2022-11-19 06:54:21,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1634 transitions. [2022-11-19 06:54:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:54:21,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:21,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:21,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:21,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-19 06:54:22,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-19 06:54:22,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:54:22,234 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:54:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:22,234 INFO L85 PathProgramCache]: Analyzing trace with hash -389871706, now seen corresponding path program 1 times [2022-11-19 06:54:22,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:54:22,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256891704] [2022-11-19 06:54:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:22,235 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 06:54:22,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:54:22,236 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:54:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 06:54:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:54:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:22,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:54:22,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:54:22,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256891704] [2022-11-19 06:54:22,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256891704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:22,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:22,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:54:22,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989640486] [2022-11-19 06:54:22,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:22,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:54:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:22,423 INFO L87 Difference]: Start difference. First operand 572 states and 1634 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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 06:54:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:22,664 INFO L93 Difference]: Finished difference Result 429 states and 1145 transitions. [2022-11-19 06:54:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 06:54:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:22,673 INFO L225 Difference]: With dead ends: 429 [2022-11-19 06:54:22,673 INFO L226 Difference]: Without dead ends: 429 [2022-11-19 06:54:22,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 06:54:22,675 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:54:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-19 06:54:22,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-11-19 06:54:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 419 states have (on average 2.7326968973747015) internal successors, (1145), 428 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1145 transitions. [2022-11-19 06:54:22,693 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1145 transitions. Word has length 8 [2022-11-19 06:54:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:22,693 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 1145 transitions. [2022-11-19 06:54:22,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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 06:54:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1145 transitions. [2022-11-19 06:54:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:54:22,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:22,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:22,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-19 06:54:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:54:22,911 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:54:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash -790305045, now seen corresponding path program 1 times [2022-11-19 06:54:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:54:22,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737791817] [2022-11-19 06:54:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:22,912 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 06:54:22,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:54:22,914 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:54:22,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 06:54:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:23,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:54:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:23,382 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:54:23,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:54:23,500 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:54:23,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:54:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:23,711 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 06:54:23,740 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:54:23,740 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 06:54:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:23,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:29,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:54:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737791817] [2022-11-19 06:54:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737791817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674747465] [2022-11-19 06:54:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:29,772 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:54:29,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:54:29,775 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:54:29,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-19 06:54:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:30,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:54:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:30,288 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:54:30,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:54:30,397 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:54:30,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:54:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:30,625 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 06:54:30,642 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:54:30,642 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 06:54:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:30,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:43,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [674747465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:43,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708764457] [2022-11-19 06:54:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:43,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:43,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:43,090 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:43,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 06:54:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:54:43,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:43,362 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:54:43,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:54:43,568 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 06:54:43,568 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 22 [2022-11-19 06:54:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:44,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:48,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708764457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:48,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:54:48,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 18 [2022-11-19 06:54:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045385326] [2022-11-19 06:54:48,246 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:48,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:54:48,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:54:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:54:48,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=295, Unknown=2, NotChecked=0, Total=380 [2022-11-19 06:54:48,248 INFO L87 Difference]: Start difference. First operand 429 states and 1145 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:49,022 INFO L93 Difference]: Finished difference Result 446 states and 1177 transitions. [2022-11-19 06:54:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:54:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:54:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:49,027 INFO L225 Difference]: With dead ends: 446 [2022-11-19 06:54:49,027 INFO L226 Difference]: Without dead ends: 446 [2022-11-19 06:54:49,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=97, Invalid=363, Unknown=2, NotChecked=0, Total=462 [2022-11-19 06:54:49,028 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:49,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 179 Unchecked, 0.4s Time] [2022-11-19 06:54:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-19 06:54:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 431. [2022-11-19 06:54:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 421 states have (on average 2.7292161520190024) internal successors, (1149), 430 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1149 transitions. [2022-11-19 06:54:49,053 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1149 transitions. Word has length 8 [2022-11-19 06:54:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:49,053 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 1149 transitions. [2022-11-19 06:54:49,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1149 transitions. [2022-11-19 06:54:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:54:49,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:49,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:49,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-19 06:54:49,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 06:54:49,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-19 06:54:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:49,659 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:54:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1270342780, now seen corresponding path program 1 times [2022-11-19 06:54:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:54:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911839032] [2022-11-19 06:54:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:49,661 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 06:54:49,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:54:49,662 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:54:49,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 06:54:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:54:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:50,117 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:54:50,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:54:50,226 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:54:50,226 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:54:50,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:50,427 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 06:54:50,445 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:54:50,445 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 06:54:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:50,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:57,472 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:55:01,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911839032] [2022-11-19 06:55:01,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911839032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54279601] [2022-11-19 06:55:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:01,905 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:01,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:55:01,906 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:55:01,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-19 06:55:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:02,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:55:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:02,361 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:55:02,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:55:02,479 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:55:02,480 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:55:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:02,710 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 06:55:02,726 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:55:02,726 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 06:55:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:55:02,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:55:04,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54279601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:04,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522833295] [2022-11-19 06:55:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:04,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:04,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:04,770 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:04,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 06:55:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:55:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:05,007 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:55:05,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:55:05,216 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 06:55:05,216 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 22 [2022-11-19 06:55:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:05,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:10,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522833295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:10,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:55:10,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 16 [2022-11-19 06:55:10,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100372802] [2022-11-19 06:55:10,212 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:10,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:55:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:55:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:55:10,213 INFO L87 Difference]: Start difference. First operand 431 states and 1149 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:10,754 INFO L93 Difference]: Finished difference Result 454 states and 1207 transitions. [2022-11-19 06:55:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:55:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 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 06:55:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:10,759 INFO L225 Difference]: With dead ends: 454 [2022-11-19 06:55:10,759 INFO L226 Difference]: Without dead ends: 454 [2022-11-19 06:55:10,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:55:10,760 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:10,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-11-19 06:55:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-19 06:55:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-11-19 06:55:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 444 states have (on average 2.7184684684684686) internal successors, (1207), 453 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1207 transitions. [2022-11-19 06:55:10,776 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1207 transitions. Word has length 9 [2022-11-19 06:55:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:10,777 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 1207 transitions. [2022-11-19 06:55:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1207 transitions. [2022-11-19 06:55:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:55:10,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:10,778 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:10,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 06:55:10,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-19 06:55:11,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:11,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:11,394 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:55:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash 25708056, now seen corresponding path program 2 times [2022-11-19 06:55:11,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:11,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934442721] [2022-11-19 06:55:11,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:55:11,395 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 06:55:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:11,396 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:55:11,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 06:55:11,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 06:55:11,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:11,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:55:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:11,656 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:55:11,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:55:11,743 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 06:55:11,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 06:55:11,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:11,852 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 06:55:11,868 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:55:11,868 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 06:55:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:55:11,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:11,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934442721] [2022-11-19 06:55:11,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934442721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:11,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:11,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:55:11,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289173755] [2022-11-19 06:55:11,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:11,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:55:11,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:55:11,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:55:11,936 INFO L87 Difference]: Start difference. First operand 454 states and 1207 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:12,206 INFO L93 Difference]: Finished difference Result 392 states and 982 transitions. [2022-11-19 06:55:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:55:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:55:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:12,209 INFO L225 Difference]: With dead ends: 392 [2022-11-19 06:55:12,210 INFO L226 Difference]: Without dead ends: 392 [2022-11-19 06:55:12,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:55:12,211 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:12,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:55:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-19 06:55:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 354. [2022-11-19 06:55:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 349 states have (on average 2.5730659025787967) internal successors, (898), 353 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 898 transitions. [2022-11-19 06:55:12,222 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 898 transitions. Word has length 9 [2022-11-19 06:55:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:12,222 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 898 transitions. [2022-11-19 06:55:12,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 898 transitions. [2022-11-19 06:55:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:55:12,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:12,223 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1] [2022-11-19 06:55:12,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:12,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:55:12,435 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:55:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1445739829, now seen corresponding path program 1 times [2022-11-19 06:55:12,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:12,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945386518] [2022-11-19 06:55:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:12,436 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 06:55:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:12,437 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:55:12,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:55:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:12,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:55:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:12,590 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 06:55:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:13,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:15,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:15,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945386518] [2022-11-19 06:55:15,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945386518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:15,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376409280] [2022-11-19 06:55:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:15,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:55:15,725 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:55:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-19 06:55:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:55:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:16,012 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 06:55:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:16,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:17,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376409280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:17,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287559674] [2022-11-19 06:55:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:17,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:17,483 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:17,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 06:55:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:17,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:55:17,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:17,673 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 06:55:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:17,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:18,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287559674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:18,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:55:18,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 27 [2022-11-19 06:55:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523876423] [2022-11-19 06:55:18,276 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 06:55:18,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 06:55:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-11-19 06:55:18,278 INFO L87 Difference]: Start difference. First operand 354 states and 898 transitions. Second operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:26,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:28,106 WARN L539 Checker$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 06:55:30,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:32,172 WARN L539 Checker$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 06:55:34,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:36,255 WARN L539 Checker$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 06:55:38,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:40,126 WARN L539 Checker$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 06:56:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:02,760 INFO L93 Difference]: Finished difference Result 4013 states and 10571 transitions. [2022-11-19 06:56:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 06:56:02,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 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 06:56:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:02,781 INFO L225 Difference]: With dead ends: 4013 [2022-11-19 06:56:02,781 INFO L226 Difference]: Without dead ends: 4013 [2022-11-19 06:56:02,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=662, Invalid=1144, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:56:02,782 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2028 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 188 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:02,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2028 Valid, 100 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2252 Invalid, 7 Unknown, 0 Unchecked, 26.9s Time] [2022-11-19 06:56:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2022-11-19 06:56:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 375. [2022-11-19 06:56:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 2.5405405405405403) internal successors, (940), 374 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 940 transitions. [2022-11-19 06:56:02,828 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 940 transitions. Word has length 11 [2022-11-19 06:56:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:02,829 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 940 transitions. [2022-11-19 06:56:02,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 940 transitions. [2022-11-19 06:56:02,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:56:02,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:02,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:02,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:03,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-19 06:56:03,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-19 06:56:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:56:03,440 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:56:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash 509441845, now seen corresponding path program 1 times [2022-11-19 06:56:03,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806231429] [2022-11-19 06:56:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:03,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:03,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:03,442 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:56:03,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:56:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:03,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:56:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:56:03,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:03,862 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 11 treesize of output 9 [2022-11-19 06:56:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:56:04,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806231429] [2022-11-19 06:56:04,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806231429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064026537] [2022-11-19 06:56:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:04,108 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:04,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:56:04,109 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:56:04,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-19 06:56:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 06:56:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:04,396 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 06:56:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:56:04,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:56:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064026537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139821927] [2022-11-19 06:56:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:05,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:05,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:05,944 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:05,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 06:56:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:56:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:56:06,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:56:06,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139821927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:56:06,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-19 06:56:06,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5, 6, 6] total 21 [2022-11-19 06:56:06,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616385746] [2022-11-19 06:56:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:56:06,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:56:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:06,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:56:06,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:56:06,126 INFO L87 Difference]: Start difference. First operand 375 states and 940 transitions. Second operand has 3 states, 2 states have (on average 5.0) 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 06:56:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:06,417 INFO L93 Difference]: Finished difference Result 367 states and 905 transitions. [2022-11-19 06:56:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:56:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) 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 11 [2022-11-19 06:56:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:06,420 INFO L225 Difference]: With dead ends: 367 [2022-11-19 06:56:06,420 INFO L226 Difference]: Without dead ends: 367 [2022-11-19 06:56:06,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:56:06,421 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:06,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:56:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-19 06:56:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-11-19 06:56:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 363 states have (on average 2.4931129476584024) internal successors, (905), 366 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 905 transitions. [2022-11-19 06:56:06,431 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 905 transitions. Word has length 11 [2022-11-19 06:56:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:06,432 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 905 transitions. [2022-11-19 06:56:06,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) 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 06:56:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 905 transitions. [2022-11-19 06:56:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:56:06,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:06,433 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-19 06:56:06,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:06,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-19 06:56:06,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-19 06:56:07,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:07,037 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:56:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:07,038 INFO L85 PathProgramCache]: Analyzing trace with hash 289481608, now seen corresponding path program 3 times [2022-11-19 06:56:07,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:07,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564482555] [2022-11-19 06:56:07,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:56:07,038 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 06:56:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:07,039 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:56:07,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 06:56:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 06:56:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:56:07,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:56:07,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:07,427 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:56:07,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:56:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:08,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:12,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:12,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564482555] [2022-11-19 06:56:12,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564482555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:12,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [451968407] [2022-11-19 06:56:12,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:56:12,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:12,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:56:12,070 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:56:12,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-19 06:56:13,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 06:56:13,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:56:13,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:56:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:13,459 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:56:13,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:56:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:13,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:19,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [451968407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:19,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669738954] [2022-11-19 06:56:19,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:56:19,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:19,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:19,642 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:19,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-19 06:56:29,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 06:56:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:56:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:56:29,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:29,612 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 06:56:29,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 06:56:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:30,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:36,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669738954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:36,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:56:36,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 46 [2022-11-19 06:56:36,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494971119] [2022-11-19 06:56:36,382 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:56:36,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 06:56:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 06:56:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=1652, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 06:56:36,384 INFO L87 Difference]: Start difference. First operand 367 states and 905 transitions. Second operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:52,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:56:54,208 WARN L539 Checker$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 06:56:56,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:56:58,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:00,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:02,245 WARN L539 Checker$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 06:57:04,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:06,251 WARN L539 Checker$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 06:57:08,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:10,258 WARN L539 Checker$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 06:57:12,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:14,278 WARN L539 Checker$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 06:57:16,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:18,285 WARN L539 Checker$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 06:57:20,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:22,299 WARN L539 Checker$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 06:57:24,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:26,340 WARN L539 Checker$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 06:57:28,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:30,347 WARN L539 Checker$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 06:57:32,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:34,354 WARN L539 Checker$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 06:57:36,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:38,361 WARN L539 Checker$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 06:57:40,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:57:42,368 WARN L539 Checker$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 06:58:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:01,967 INFO L93 Difference]: Finished difference Result 3156 states and 8122 transitions. [2022-11-19 06:58:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 06:58:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 06:58:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:01,984 INFO L225 Difference]: With dead ends: 3156 [2022-11-19 06:58:01,984 INFO L226 Difference]: Without dead ends: 3156 [2022-11-19 06:58:01,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=1025, Invalid=2397, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 06:58:01,985 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2213 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 237 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:01,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2213 Valid, 159 Invalid, 3670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 3408 Invalid, 25 Unknown, 0 Unchecked, 63.5s Time] [2022-11-19 06:58:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2022-11-19 06:58:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 380. [2022-11-19 06:58:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 376 states have (on average 2.476063829787234) internal successors, (931), 379 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 931 transitions. [2022-11-19 06:58:02,021 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 931 transitions. Word has length 13 [2022-11-19 06:58:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:02,021 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 931 transitions. [2022-11-19 06:58:02,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 931 transitions. [2022-11-19 06:58:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:58:02,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:02,023 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1] [2022-11-19 06:58:02,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:02,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-19 06:58:02,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:02,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:58:02,638 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:58:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash -671561925, now seen corresponding path program 2 times [2022-11-19 06:58:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:58:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882993877] [2022-11-19 06:58:02,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:58:02,639 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 06:58:02,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:58:02,640 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:02,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:02,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:58:02,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:58:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:58:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:02,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:58:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:03,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:06,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882993877] [2022-11-19 06:58:06,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882993877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:06,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905150818] [2022-11-19 06:58:06,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:58:06,188 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:58:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:58:06,198 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:58:06,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-19 06:58:06,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:58:06,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:58:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:58:06,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:06,638 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 06:58:06,973 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 06:58:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:07,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:09,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905150818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144605785] [2022-11-19 06:58:09,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:58:09,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:09,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:09,461 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:09,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-19 06:58:09,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:58:09,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:58:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 06:58:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:09,714 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 06:58:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:10,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144605785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:12,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:58:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 44 [2022-11-19 06:58:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349536503] [2022-11-19 06:58:12,723 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 06:58:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 06:58:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:58:12,725 INFO L87 Difference]: Start difference. First operand 380 states and 931 transitions. Second operand has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:33,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:58:37,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:58:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:42,240 INFO L93 Difference]: Finished difference Result 851 states and 2013 transitions. [2022-11-19 06:58:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 06:58:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 0 states have call successors, (0), 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 06:58:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:42,247 INFO L225 Difference]: With dead ends: 851 [2022-11-19 06:58:42,247 INFO L226 Difference]: Without dead ends: 851 [2022-11-19 06:58:42,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=534, Invalid=3372, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 06:58:42,249 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 706 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 903 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:42,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 0 Invalid, 3365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2357 Invalid, 0 Unknown, 903 Unchecked, 21.0s Time] [2022-11-19 06:58:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-19 06:58:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 533. [2022-11-19 06:58:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 529 states have (on average 2.54820415879017) internal successors, (1348), 532 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1348 transitions. [2022-11-19 06:58:42,266 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1348 transitions. Word has length 15 [2022-11-19 06:58:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:42,266 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 1348 transitions. [2022-11-19 06:58:42,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1348 transitions. [2022-11-19 06:58:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:58:42,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:42,269 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:42,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:42,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:42,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:42,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:58:42,873 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:58:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash -144587940, now seen corresponding path program 1 times [2022-11-19 06:58:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:58:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387190061] [2022-11-19 06:58:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:42,874 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 06:58:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:58:42,876 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:42,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:58:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:43,089 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 06:58:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:43,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:46,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387190061] [2022-11-19 06:58:46,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387190061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634663369] [2022-11-19 06:58:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:46,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:58:46,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:58:46,178 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:58:46,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-19 06:58:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:46,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:58:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:47,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:48,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634663369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:48,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659499686] [2022-11-19 06:58:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:48,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:48,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:48,743 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:48,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-19 06:58:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 06:58:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:48,941 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 06:58:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:49,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:58:52,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659499686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:52,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:58:52,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 44 [2022-11-19 06:58:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100820732] [2022-11-19 06:58:52,038 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:52,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 06:58:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 06:58:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:58:52,040 INFO L87 Difference]: Start difference. First operand 533 states and 1348 transitions. Second operand has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:11,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:16,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:20,503 INFO L93 Difference]: Finished difference Result 1111 states and 2745 transitions. [2022-11-19 06:59:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 06:59:20,504 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 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 06:59:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:20,508 INFO L225 Difference]: With dead ends: 1111 [2022-11-19 06:59:20,508 INFO L226 Difference]: Without dead ends: 1111 [2022-11-19 06:59:20,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=632, Invalid=4338, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 06:59:20,510 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 701 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:20,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 0 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1648 Invalid, 0 Unknown, 603 Unchecked, 15.0s Time] [2022-11-19 06:59:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-11-19 06:59:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 556. [2022-11-19 06:59:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 552 states have (on average 2.5778985507246377) internal successors, (1423), 555 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1423 transitions. [2022-11-19 06:59:20,527 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1423 transitions. Word has length 16 [2022-11-19 06:59:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:20,527 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 1423 transitions. [2022-11-19 06:59:20,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1423 transitions. [2022-11-19 06:59:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:59:20,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:20,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:20,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:20,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-19 06:59:20,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:21,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:21,143 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 06:59:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash -310654936, now seen corresponding path program 2 times [2022-11-19 06:59:21,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:21,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453983865] [2022-11-19 06:59:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:59:21,144 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 06:59:21,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:21,145 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:59:21,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:59:21,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:59:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:59:21,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:21,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:59:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:21,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:24,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:24,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453983865] [2022-11-19 06:59:24,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453983865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:24,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [370341105] [2022-11-19 06:59:24,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:59:24,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:59:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:59:24,531 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:59:24,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-19 06:59:24,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:59:24,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:59:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:24,965 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 06:59:25,323 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 06:59:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:59:25,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:59:27,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [370341105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:27,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675960139] [2022-11-19 06:59:27,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:59:27,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:27,657 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:27,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-19 06:59:27,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:59:27,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:27,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 06:59:27,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:27,919 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 06:59:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:59:28,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:59:31,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675960139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:31,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:59:31,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 44 [2022-11-19 06:59:31,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408314032] [2022-11-19 06:59:31,076 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:31,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 06:59:31,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:59:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 06:59:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:59:31,078 INFO L87 Difference]: Start difference. First operand 556 states and 1423 transitions. Second operand has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:48,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:00:03,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:00:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:04,953 INFO L93 Difference]: Finished difference Result 1330 states and 3322 transitions. [2022-11-19 07:00:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-19 07:00:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 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 07:00:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:04,958 INFO L225 Difference]: With dead ends: 1330 [2022-11-19 07:00:04,958 INFO L226 Difference]: Without dead ends: 1330 [2022-11-19 07:00:04,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=894, Invalid=6588, Unknown=0, NotChecked=0, Total=7482 [2022-11-19 07:00:04,961 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 449 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:04,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 0 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1672 Invalid, 0 Unknown, 622 Unchecked, 14.5s Time] [2022-11-19 07:00:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-11-19 07:00:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 763. [2022-11-19 07:00:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 759 states have (on average 2.731225296442688) internal successors, (2073), 762 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2073 transitions. [2022-11-19 07:00:04,991 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2073 transitions. Word has length 16 [2022-11-19 07:00:04,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:04,991 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 2073 transitions. [2022-11-19 07:00:04,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:04,992 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2073 transitions. [2022-11-19 07:00:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:00:04,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:04,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:04,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:05,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:00:05,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:05,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:05,599 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:00:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:05,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1635368794, now seen corresponding path program 1 times [2022-11-19 07:00:05,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:05,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689312986] [2022-11-19 07:00:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:05,600 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 07:00:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:05,602 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:05,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:00:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:05,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:00:05,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:05,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:05,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:05,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689312986] [2022-11-19 07:00:05,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689312986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:05,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:05,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:00:05,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843124690] [2022-11-19 07:00:05,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:05,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:00:05,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:00:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:00:05,862 INFO L87 Difference]: Start difference. First operand 763 states and 2073 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:06,122 INFO L93 Difference]: Finished difference Result 1015 states and 2823 transitions. [2022-11-19 07:00:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:00:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:06,127 INFO L225 Difference]: With dead ends: 1015 [2022-11-19 07:00:06,127 INFO L226 Difference]: Without dead ends: 953 [2022-11-19 07:00:06,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 07:00:06,128 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:06,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:00:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-11-19 07:00:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 942. [2022-11-19 07:00:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 938 states have (on average 2.728144989339019) internal successors, (2559), 941 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2559 transitions. [2022-11-19 07:00:06,158 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2559 transitions. Word has length 17 [2022-11-19 07:00:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:06,158 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 2559 transitions. [2022-11-19 07:00:06,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2559 transitions. [2022-11-19 07:00:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:00:06,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:06,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:06,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:06,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:00:06,376 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:00:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1937651657, now seen corresponding path program 1 times [2022-11-19 07:00:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:06,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414342962] [2022-11-19 07:00:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:06,377 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 07:00:06,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:06,378 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:06,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:06,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:00:06,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:06,610 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 07:00:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:07,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:09,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414342962] [2022-11-19 07:00:09,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414342962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [773212326] [2022-11-19 07:00:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:00:09,928 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:00:09,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-19 07:00:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:00:10,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:11,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:12,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [773212326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:12,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160357102] [2022-11-19 07:00:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:12,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:12,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:12,743 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:12,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-19 07:00:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:12,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:00:13,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:13,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:00:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:14,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:16,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160357102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:16,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:00:16,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 44 [2022-11-19 07:00:16,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231584427] [2022-11-19 07:00:16,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:16,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:00:16,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:00:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:00:16,676 INFO L87 Difference]: Start difference. First operand 942 states and 2559 transitions. Second operand has 45 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:55,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:01:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:03,237 INFO L93 Difference]: Finished difference Result 1679 states and 4389 transitions. [2022-11-19 07:01:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:01:03,239 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 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 07:01:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:03,253 INFO L225 Difference]: With dead ends: 1679 [2022-11-19 07:01:03,253 INFO L226 Difference]: Without dead ends: 1644 [2022-11-19 07:01:03,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=729, Invalid=4971, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 07:01:03,256 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 769 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:03,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 0 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2351 Invalid, 0 Unknown, 836 Unchecked, 27.0s Time] [2022-11-19 07:01:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-11-19 07:01:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1018. [2022-11-19 07:01:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1014 states have (on average 2.775147928994083) internal successors, (2814), 1017 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 2814 transitions. [2022-11-19 07:01:03,295 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 2814 transitions. Word has length 17 [2022-11-19 07:01:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:03,296 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 2814 transitions. [2022-11-19 07:01:03,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 2814 transitions. [2022-11-19 07:01:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:01:03,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:03,299 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-11-19 07:01:03,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:03,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:03,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-19 07:01:03,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:03,909 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:01:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1694591685, now seen corresponding path program 3 times [2022-11-19 07:01:03,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:03,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146295164] [2022-11-19 07:01:03,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:03,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:01:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:03,912 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:03,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-19 07:01:04,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:01:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:04,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:01:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:04,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:01:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:04,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-19 07:01:04,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-19 07:01:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:01:04,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:04,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:04,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146295164] [2022-11-19 07:01:04,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146295164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:04,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:04,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:01:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30834901] [2022-11-19 07:01:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:04,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:01:04,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:01:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:01:04,731 INFO L87 Difference]: Start difference. First operand 1018 states and 2814 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 07:01:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:04,932 INFO L93 Difference]: Finished difference Result 874 states and 2380 transitions. [2022-11-19 07:01:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:01:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 17 [2022-11-19 07:01:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:04,936 INFO L225 Difference]: With dead ends: 874 [2022-11-19 07:01:04,936 INFO L226 Difference]: Without dead ends: 874 [2022-11-19 07:01:04,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:01:04,937 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:04,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-19 07:01:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-19 07:01:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 874. [2022-11-19 07:01:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 870 states have (on average 2.735632183908046) internal successors, (2380), 873 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2380 transitions. [2022-11-19 07:01:04,963 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2380 transitions. Word has length 17 [2022-11-19 07:01:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:04,964 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 2380 transitions. [2022-11-19 07:01:04,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 07:01:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2380 transitions. [2022-11-19 07:01:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:01:04,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:04,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:04,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:05,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:01:05,184 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:01:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1370172258, now seen corresponding path program 1 times [2022-11-19 07:01:05,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:05,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775646618] [2022-11-19 07:01:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:05,185 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 07:01:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:05,186 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:05,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-19 07:01:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:01:05,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:05,461 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 07:01:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:06,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:09,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775646618] [2022-11-19 07:01:09,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775646618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [617037842] [2022-11-19 07:01:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:09,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:01:09,107 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:01:09,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-19 07:01:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:09,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:01:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:10,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:12,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [617037842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:12,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259763970] [2022-11-19 07:01:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:12,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:12,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:12,258 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:12,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-19 07:01:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:01:12,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:12,552 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:01:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:13,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259763970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:16,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:01:16,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 44 [2022-11-19 07:01:16,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466327526] [2022-11-19 07:01:16,175 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:16,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:01:16,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:01:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:01:16,177 INFO L87 Difference]: Start difference. First operand 874 states and 2380 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:54,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:02:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:00,090 INFO L93 Difference]: Finished difference Result 1659 states and 4329 transitions. [2022-11-19 07:02:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-19 07:02:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:02:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:00,098 INFO L225 Difference]: With dead ends: 1659 [2022-11-19 07:02:00,098 INFO L226 Difference]: Without dead ends: 1653 [2022-11-19 07:02:00,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=770, Invalid=4930, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 07:02:00,101 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 896 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 780 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:00,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 0 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2010 Invalid, 0 Unknown, 780 Unchecked, 19.6s Time] [2022-11-19 07:02:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-11-19 07:02:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 961. [2022-11-19 07:02:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 957 states have (on average 2.781609195402299) internal successors, (2662), 960 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 2662 transitions. [2022-11-19 07:02:00,158 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 2662 transitions. Word has length 18 [2022-11-19 07:02:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:00,158 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 2662 transitions. [2022-11-19 07:02:00,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 2662 transitions. [2022-11-19 07:02:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:02:00,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:00,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:00,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:02:00,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:00,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:00,779 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:02:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -688032915, now seen corresponding path program 1 times [2022-11-19 07:02:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:02:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003710966] [2022-11-19 07:02:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:00,781 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 07:02:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:02:00,782 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:02:00,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-19 07:02:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:02:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:01,069 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 07:02:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:01,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:04,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:02:04,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003710966] [2022-11-19 07:02:04,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003710966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:04,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224114264] [2022-11-19 07:02:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:04,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:02:04,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:02:04,631 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:02:04,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-19 07:02:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:05,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:02:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:06,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:07,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224114264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:07,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930387978] [2022-11-19 07:02:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:07,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:07,851 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:07,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-19 07:02:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:02:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:08,123 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 07:02:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:09,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:11,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930387978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:11,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:02:11,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 44 [2022-11-19 07:02:11,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170472380] [2022-11-19 07:02:11,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:11,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:02:11,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:11,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:02:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:02:11,659 INFO L87 Difference]: Start difference. First operand 961 states and 2662 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:43,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:02:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:46,794 INFO L93 Difference]: Finished difference Result 1615 states and 4259 transitions. [2022-11-19 07:02:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 07:02:46,796 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:02:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:46,800 INFO L225 Difference]: With dead ends: 1615 [2022-11-19 07:02:46,800 INFO L226 Difference]: Without dead ends: 1595 [2022-11-19 07:02:46,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=685, Invalid=4007, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:02:46,802 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1156 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 625 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:46,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 0 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1748 Invalid, 0 Unknown, 625 Unchecked, 16.7s Time] [2022-11-19 07:02:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-11-19 07:02:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 931. [2022-11-19 07:02:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 927 states have (on average 2.7820927723840345) internal successors, (2579), 930 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2579 transitions. [2022-11-19 07:02:46,829 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2579 transitions. Word has length 18 [2022-11-19 07:02:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:46,830 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2579 transitions. [2022-11-19 07:02:46,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2579 transitions. [2022-11-19 07:02:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:02:46,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:46,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:46,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:47,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:47,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-19 07:02:47,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:02:47,438 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:02:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash 507070713, now seen corresponding path program 2 times [2022-11-19 07:02:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:02:47,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997570911] [2022-11-19 07:02:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:02:47,439 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 07:02:47,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:02:47,442 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:02:47,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:02:47,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:02:47,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:47,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:02:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:47,745 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 07:02:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:48,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:51,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:02:51,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997570911] [2022-11-19 07:02:51,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997570911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [99536258] [2022-11-19 07:02:51,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:02:51,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:02:51,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:02:51,233 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:02:51,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-19 07:02:51,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:02:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:02:51,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:51,829 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:02:52,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:02:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:52,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:54,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [99536258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372543825] [2022-11-19 07:02:54,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:02:54,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:54,985 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:54,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-19 07:02:55,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:02:55,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:55,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:02:55,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:55,316 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 07:02:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:56,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:58,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372543825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:58,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:02:58,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 8, 8, 8] total 44 [2022-11-19 07:02:58,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123242846] [2022-11-19 07:02:58,946 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:58,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:02:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:02:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:02:58,950 INFO L87 Difference]: Start difference. First operand 931 states and 2579 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:18,908 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 07:03:22,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:03:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:25,282 INFO L93 Difference]: Finished difference Result 1400 states and 3763 transitions. [2022-11-19 07:03:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:03:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:03:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:25,288 INFO L225 Difference]: With dead ends: 1400 [2022-11-19 07:03:25,288 INFO L226 Difference]: Without dead ends: 1400 [2022-11-19 07:03:25,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=567, Invalid=3723, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 07:03:25,290 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 626 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 646 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:25,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 0 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1448 Invalid, 1 Unknown, 646 Unchecked, 15.6s Time] [2022-11-19 07:03:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-11-19 07:03:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 971. [2022-11-19 07:03:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 967 states have (on average 2.8252326783867634) internal successors, (2732), 970 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2732 transitions. [2022-11-19 07:03:25,322 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2732 transitions. Word has length 18 [2022-11-19 07:03:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:25,323 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 2732 transitions. [2022-11-19 07:03:25,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2732 transitions. [2022-11-19 07:03:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:03:25,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:25,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:25,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:25,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:25,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:25,932 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:03:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1959806424, now seen corresponding path program 3 times [2022-11-19 07:03:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:25,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483413313] [2022-11-19 07:03:25,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:03:25,933 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 07:03:25,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:25,936 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:03:25,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:03:26,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:03:26,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:26,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:03:26,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:26,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:03:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:26,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-19 07:03:26,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-19 07:03:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:03:26,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:26,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483413313] [2022-11-19 07:03:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483413313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:26,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:26,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:03:26,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641818507] [2022-11-19 07:03:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:26,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:03:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:03:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:03:26,727 INFO L87 Difference]: Start difference. First operand 971 states and 2732 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:26,966 INFO L93 Difference]: Finished difference Result 978 states and 2743 transitions. [2022-11-19 07:03:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:03:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 18 [2022-11-19 07:03:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:26,970 INFO L225 Difference]: With dead ends: 978 [2022-11-19 07:03:26,970 INFO L226 Difference]: Without dead ends: 978 [2022-11-19 07:03:26,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:26,971 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:26,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-11-19 07:03:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-19 07:03:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 977. [2022-11-19 07:03:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 973 states have (on average 2.8180883864337103) internal successors, (2742), 976 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2742 transitions. [2022-11-19 07:03:26,994 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2742 transitions. Word has length 18 [2022-11-19 07:03:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:26,995 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 2742 transitions. [2022-11-19 07:03:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2742 transitions. [2022-11-19 07:03:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:03:26,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:26,998 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:27,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:27,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:03:27,212 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:03:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash -855211732, now seen corresponding path program 4 times [2022-11-19 07:03:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:27,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621056193] [2022-11-19 07:03:27,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:03:27,213 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 07:03:27,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:27,215 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:03:27,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-19 07:03:27,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:03:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:27,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:03:27,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:27,506 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 07:03:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:03:28,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:03:31,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621056193] [2022-11-19 07:03:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621056193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [274402226] [2022-11-19 07:03:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:03:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:03:31,065 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:03:31,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-19 07:03:31,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:03:31,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:31,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:03:31,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:32,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:35,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [274402226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162378277] [2022-11-19 07:03:35,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:03:35,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:35,892 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:35,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-19 07:03:36,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:03:36,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:36,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:03:36,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:37,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:37,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162378277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:37,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:03:37,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 11, 11] total 42 [2022-11-19 07:03:37,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859678602] [2022-11-19 07:03:37,726 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:37,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 07:03:37,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:37,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 07:03:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:03:37,728 INFO L87 Difference]: Start difference. First operand 977 states and 2742 transitions. Second operand has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:56,223 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 07:04:00,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:05,261 WARN L539 Checker$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 07:04:07,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:09,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:10,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:13,003 WARN L539 Checker$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 07:04:20,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:21,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:23,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:25,095 WARN L539 Checker$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 07:04:29,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:31,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:33,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:35,343 WARN L539 Checker$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 07:04:37,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:04:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:37,595 INFO L93 Difference]: Finished difference Result 2016 states and 5131 transitions. [2022-11-19 07:04:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 07:04:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 07:04:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:37,602 INFO L225 Difference]: With dead ends: 2016 [2022-11-19 07:04:37,603 INFO L226 Difference]: Without dead ends: 1733 [2022-11-19 07:04:37,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1269, Invalid=6041, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 07:04:37,605 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2429 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3337 mSolverCounterSat, 324 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2429 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 3337 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 45.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:37,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2429 Valid, 0 Invalid, 3781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 3337 Invalid, 9 Unknown, 111 Unchecked, 45.3s Time] [2022-11-19 07:04:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-19 07:04:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1049. [2022-11-19 07:04:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1045 states have (on average 2.6832535885167466) internal successors, (2804), 1048 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2804 transitions. [2022-11-19 07:04:37,657 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2804 transitions. Word has length 18 [2022-11-19 07:04:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 2804 transitions. [2022-11-19 07:04:37,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2804 transitions. [2022-11-19 07:04:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:04:37,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:37,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:37,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:37,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-11-19 07:04:38,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-19 07:04:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:04:38,272 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:04:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash 351444666, now seen corresponding path program 1 times [2022-11-19 07:04:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085909030] [2022-11-19 07:04:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:38,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:04:38,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:38,274 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:38,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-19 07:04:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:04:38,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:04:38,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:38,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085909030] [2022-11-19 07:04:38,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085909030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:38,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:38,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:04:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117330650] [2022-11-19 07:04:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:38,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:38,610 INFO L87 Difference]: Start difference. First operand 1049 states and 2804 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 07:04:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:38,884 INFO L93 Difference]: Finished difference Result 1220 states and 3262 transitions. [2022-11-19 07:04:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 07:04:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:38,889 INFO L225 Difference]: With dead ends: 1220 [2022-11-19 07:04:38,889 INFO L226 Difference]: Without dead ends: 1206 [2022-11-19 07:04:38,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 07:04:38,890 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:38,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:04:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2022-11-19 07:04:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1150. [2022-11-19 07:04:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1146 states have (on average 2.6780104712041886) internal successors, (3069), 1149 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3069 transitions. [2022-11-19 07:04:38,925 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3069 transitions. Word has length 19 [2022-11-19 07:04:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:38,925 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 3069 transitions. [2022-11-19 07:04:38,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 07:04:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3069 transitions. [2022-11-19 07:04:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:04:38,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:38,928 INFO L195 NwaCegarLoop]: trace histogram [18, 1, 1, 1] [2022-11-19 07:04:38,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:39,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:04:39,144 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-19 07:04:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash 894486731, now seen corresponding path program 2 times [2022-11-19 07:04:39,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:39,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829025881] [2022-11-19 07:04:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:04:39,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:04:39,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:39,147 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:39,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:04:39,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:04:39,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:04:39,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:39,529 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 07:04:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:41,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:54,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829025881] [2022-11-19 07:04:54,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829025881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1064134146] [2022-11-19 07:04:54,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:04:54,318 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:04:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:04:54,319 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:04:54,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-19 07:04:55,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:04:55,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:04:55,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:55,172 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 07:04:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:55,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:57,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1064134146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:57,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892366772] [2022-11-19 07:04:57,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:04:57,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:57,127 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:57,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9badb39c-66ae-4f15-bd50-e6ca7461048f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-19 07:04:57,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:04:57,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:04:57,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:57,613 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 07:04:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:58,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:59,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892366772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:59,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:04:59,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 39 [2022-11-19 07:04:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252512864] [2022-11-19 07:04:59,552 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 07:04:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 07:04:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:04:59,554 INFO L87 Difference]: Start difference. First operand 1150 states and 3069 transitions. Second operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 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 07:05:29,135 WARN L233 SmtUtils]: Spent 14.82s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:32,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:05:34,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:05:36,139 WARN L539 Checker$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 07:05:38,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:05:40,235 WARN L539 Checker$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 07:05:42,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:05:44,242 WARN L539 Checker$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 07:05:46,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:05:48,249 WARN L539 Checker$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 07:05:50,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:05:52,256 WARN L539 Checker$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 07:05:54,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:05:56,264 WARN L539 Checker$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 07:05:58,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:06:00,271 WARN L539 Checker$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 07:06:02,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:06:04,279 WARN L539 Checker$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 07:06:06,282 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 07:06:23,832 WARN L233 SmtUtils]: Spent 15.85s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:38,649 WARN L233 SmtUtils]: Spent 12.18s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:51,386 WARN L233 SmtUtils]: Spent 10.32s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:03,798 WARN L233 SmtUtils]: Spent 10.30s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:13,848 WARN L233 SmtUtils]: Spent 7.71s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)