./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:43:26,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:43:26,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:43:26,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:43:26,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:43:26,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:43:26,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:43:26,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:43:26,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:43:26,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:43:26,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:43:26,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:43:26,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:43:26,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:43:26,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:43:26,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:43:26,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:43:26,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:43:26,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:43:26,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:43:26,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:43:26,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:43:26,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:43:26,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:43:26,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:43:26,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:43:26,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:43:26,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:43:26,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:43:26,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:43:26,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:43:26,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:43:26,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:43:26,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:43:26,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:43:26,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:43:26,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:43:26,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:43:26,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:43:26,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:43:26,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:43:26,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:43:26,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:43:26,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:43:26,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:43:26,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:43:26,514 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:43:26,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:43:26,514 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:43:26,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:43:26,515 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:43:26,515 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:43:26,515 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:43:26,515 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:43:26,516 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:43:26,516 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:43:26,516 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:43:26,516 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:43:26,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:43:26,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:43:26,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:43:26,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:43:26,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:43:26,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:43:26,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:43:26,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:43:26,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:43:26,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:43:26,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:43:26,520 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:43:26,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:43:26,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:43:26,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:43:26,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:26,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:43:26,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:43:26,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:43:26,522 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:43:26,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:43:26,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:43:26,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:43:26,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:43:26,523 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 [2021-11-19 15:43:26,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:43:26,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:43:26,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:43:26,903 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:43:26,904 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:43:26,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-19 15:43:27,030 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/617d1999d/82abd5eda5d94feebf729792b08c7f7c/FLAG3d63c04a0 [2021-11-19 15:43:27,722 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:43:27,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-19 15:43:27,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/617d1999d/82abd5eda5d94feebf729792b08c7f7c/FLAG3d63c04a0 [2021-11-19 15:43:28,032 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/617d1999d/82abd5eda5d94feebf729792b08c7f7c [2021-11-19 15:43:28,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:43:28,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:43:28,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:28,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:43:28,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:43:28,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:28" (1/1) ... [2021-11-19 15:43:28,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1868ece9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:28, skipping insertion in model container [2021-11-19 15:43:28,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:28" (1/1) ... [2021-11-19 15:43:28,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:43:28,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:43:28,356 WARN L230 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_05809337-407d-4aea-b02d-bd1e480d2ad0/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-19 15:43:28,368 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:28,380 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:43:28,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@569059b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:28, skipping insertion in model container [2021-11-19 15:43:28,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:28,381 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:43:28,384 INFO L158 Benchmark]: Toolchain (without parser) took 346.06ms. Allocated memory is still 130.0MB. Free memory was 94.1MB in the beginning and 104.8MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 15:43:28,385 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 63.0MB in the beginning and 62.9MB in the end (delta: 26.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:43:28,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.67ms. Allocated memory is still 130.0MB. Free memory was 93.9MB in the beginning and 104.8MB in the end (delta: -10.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 15:43:28,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 63.0MB in the beginning and 62.9MB in the end (delta: 26.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.67ms. Allocated memory is still 130.0MB. Free memory was 93.9MB in the beginning and 104.8MB in the end (delta: -10.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 161]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:43:31,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:43:31,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:43:31,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:43:31,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:43:31,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:43:31,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:43:31,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:43:31,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:43:31,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:43:31,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:43:31,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:43:31,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:43:31,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:43:31,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:43:31,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:43:31,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:43:31,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:43:31,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:43:31,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:43:31,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:43:31,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:43:31,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:43:31,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:43:31,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:43:31,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:43:31,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:43:31,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:43:31,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:43:31,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:43:31,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:43:31,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:43:31,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:43:31,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:43:31,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:43:31,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:43:31,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:43:31,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:43:31,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:43:31,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:43:31,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:43:31,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:43:31,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:43:31,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:43:31,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:43:31,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:43:31,324 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:43:31,324 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:43:31,324 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:43:31,325 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:43:31,325 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:43:31,325 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:43:31,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:43:31,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:43:31,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:43:31,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:43:31,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:43:31,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:43:31,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:43:31,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:43:31,330 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:43:31,331 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:43:31,331 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:43:31,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:43:31,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:43:31,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:43:31,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:43:31,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:43:31,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:43:31,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:31,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:43:31,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:43:31,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:43:31,335 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:43:31,335 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:43:31,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:43:31,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:43:31,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:43:31,337 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_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 [2021-11-19 15:43:31,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:43:31,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:43:31,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:43:31,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:43:31,820 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:43:31,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-19 15:43:31,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/0d69ca57a/e18774f17003412599bd17e3ee422ea0/FLAG4b0f8d186 [2021-11-19 15:43:32,552 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:43:32,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-19 15:43:32,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/0d69ca57a/e18774f17003412599bd17e3ee422ea0/FLAG4b0f8d186 [2021-11-19 15:43:32,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/data/0d69ca57a/e18774f17003412599bd17e3ee422ea0 [2021-11-19 15:43:32,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:43:32,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:43:32,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:32,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:43:32,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:43:32,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:32" (1/1) ... [2021-11-19 15:43:32,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5b7d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:32, skipping insertion in model container [2021-11-19 15:43:32,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:32" (1/1) ... [2021-11-19 15:43:32,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:43:32,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:43:33,248 WARN L230 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_05809337-407d-4aea-b02d-bd1e480d2ad0/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-19 15:43:33,286 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:33,306 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:43:33,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:43:33,378 WARN L230 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_05809337-407d-4aea-b02d-bd1e480d2ad0/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-19 15:43:33,393 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:33,406 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:43:33,534 WARN L230 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_05809337-407d-4aea-b02d-bd1e480d2ad0/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-19 15:43:33,548 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:33,595 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:43:33,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33 WrapperNode [2021-11-19 15:43:33,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:33,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:43:33,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:43:33,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:43:33,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,705 INFO L137 Inliner]: procedures = 29, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 297 [2021-11-19 15:43:33,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:43:33,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:43:33,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:43:33,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:43:33,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:43:33,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:43:33,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:43:33,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:43:33,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (1/1) ... [2021-11-19 15:43:33,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:43:33,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:43:33,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:43:33,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:43:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:43:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:43:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:43:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-19 15:43:33,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-19 15:43:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-19 15:43:33,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-19 15:43:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-19 15:43:33,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-19 15:43:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-19 15:43:33,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-19 15:43:33,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-19 15:43:33,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-19 15:43:33,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:43:33,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:43:33,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:43:33,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:43:33,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:43:33,923 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 15:43:34,154 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:43:34,156 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:43:34,909 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:43:35,261 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:43:35,262 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-19 15:43:35,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:43:35 BoogieIcfgContainer [2021-11-19 15:43:35,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:43:35,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:43:35,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:43:35,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:43:35,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:43:32" (1/3) ... [2021-11-19 15:43:35,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d20c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:43:35, skipping insertion in model container [2021-11-19 15:43:35,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:33" (2/3) ... [2021-11-19 15:43:35,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d20c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:43:35, skipping insertion in model container [2021-11-19 15:43:35,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:43:35" (3/3) ... [2021-11-19 15:43:35,274 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2021-11-19 15:43:35,281 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 15:43:35,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:43:35,281 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:43:35,282 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 15:43:35,354 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,354 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,355 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,355 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,355 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,355 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,356 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,356 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,356 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,356 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,357 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,357 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,357 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,357 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,360 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,360 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,360 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,361 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,361 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,361 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,362 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,362 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,362 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,362 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,364 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,364 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,364 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,366 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,366 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,368 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,368 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,368 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,368 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,369 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,369 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,369 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,369 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,371 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,371 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,371 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,372 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,372 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,372 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,372 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,373 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,373 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,373 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,373 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,374 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,374 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,374 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,375 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,375 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,376 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,376 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,376 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,376 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,377 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,377 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,377 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,377 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,378 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,378 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,378 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,378 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,379 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,379 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,379 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,379 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,379 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,380 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,380 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,380 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,381 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,381 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,381 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,381 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,382 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,382 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,382 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,382 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,383 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,383 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,400 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,404 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,406 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,409 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,410 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,410 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,410 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,410 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,411 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,419 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,419 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,420 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,420 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,420 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,420 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,420 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,423 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:43:35,425 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-19 15:43:35,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:43:35,500 INFO L339 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:43:35,501 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-19 15:43:35,557 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-19 15:43:35,587 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 223 transitions, 478 flow [2021-11-19 15:43:35,597 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 223 transitions, 478 flow [2021-11-19 15:43:35,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 218 places, 223 transitions, 478 flow [2021-11-19 15:43:35,719 INFO L129 PetriNetUnfolder]: 18/219 cut-off events. [2021-11-19 15:43:35,720 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-19 15:43:35,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 219 events. 18/219 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2021-11-19 15:43:35,733 INFO L116 LiptonReduction]: Number of co-enabled transitions 2000 [2021-11-19 15:44:06,503 WARN L227 SmtUtils]: Spent 10.53s on a formula simplification. DAG size of input: 142 DAG size of output: 141 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 15:44:15,638 WARN L227 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 148 DAG size of output: 145 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 15:44:17,807 INFO L131 LiptonReduction]: Checked pairs total: 4258 [2021-11-19 15:44:17,807 INFO L133 LiptonReduction]: Total number of compositions: 217 [2021-11-19 15:44:17,815 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 116 flow [2021-11-19 15:44:17,895 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 854 states, 853 states have (on average 4.173505275498242) internal successors, (3560), 853 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 854 states, 853 states have (on average 4.173505275498242) internal successors, (3560), 853 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 15:44:17,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:17,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:17,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1655862042, now seen corresponding path program 1 times [2021-11-19 15:44:17,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:17,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556487354] [2021-11-19 15:44:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:17,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:17,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:17,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:18,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:44:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:44:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:18,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:18,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556487354] [2021-11-19 15:44:18,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556487354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:18,604 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:18,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-19 15:44:18,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547033823] [2021-11-19 15:44:18,608 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:18,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:44:18,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:44:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:44:18,686 INFO L87 Difference]: Start difference. First operand has 854 states, 853 states have (on average 4.173505275498242) internal successors, (3560), 853 states have internal predecessors, (3560), 0 states have call successors, (0), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:19,060 INFO L93 Difference]: Finished difference Result 1261 states and 5285 transitions. [2021-11-19 15:44:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:44:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-19 15:44:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:19,107 INFO L225 Difference]: With dead ends: 1261 [2021-11-19 15:44:19,107 INFO L226 Difference]: Without dead ends: 1216 [2021-11-19 15:44:19,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:44:19,113 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 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 [2021-11-19 15:44:19,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:44:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-19 15:44:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2021-11-19 15:44:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 4.195884773662551) internal successors, (5098), 1215 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 5098 transitions. [2021-11-19 15:44:19,310 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 5098 transitions. Word has length 27 [2021-11-19 15:44:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:19,311 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 5098 transitions. [2021-11-19 15:44:19,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 5098 transitions. [2021-11-19 15:44:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 15:44:19,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:19,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:19,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 15:44:19,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:19,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:19,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1983621928, now seen corresponding path program 1 times [2021-11-19 15:44:19,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:19,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798526884] [2021-11-19 15:44:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:19,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:19,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:19,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:44:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:44:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:19,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:20,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:20,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798526884] [2021-11-19 15:44:20,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798526884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:20,125 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:20,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 15:44:20,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890533697] [2021-11-19 15:44:20,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:20,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:44:20,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:44:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:44:20,129 INFO L87 Difference]: Start difference. First operand 1216 states and 5098 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:20,476 INFO L93 Difference]: Finished difference Result 1654 states and 6690 transitions. [2021-11-19 15:44:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:44:20,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 29 [2021-11-19 15:44:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:20,502 INFO L225 Difference]: With dead ends: 1654 [2021-11-19 15:44:20,502 INFO L226 Difference]: Without dead ends: 1618 [2021-11-19 15:44:20,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:44:20,505 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:20,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 8 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:44:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-11-19 15:44:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1504. [2021-11-19 15:44:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 4.125083166999334) internal successors, (6200), 1503 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 6200 transitions. [2021-11-19 15:44:20,648 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 6200 transitions. Word has length 29 [2021-11-19 15:44:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:20,649 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 6200 transitions. [2021-11-19 15:44:20,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 6200 transitions. [2021-11-19 15:44:20,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 15:44:20,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:20,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:20,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:20,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:20,874 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash -341646937, now seen corresponding path program 1 times [2021-11-19 15:44:20,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:20,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845069313] [2021-11-19 15:44:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:20,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:20,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:20,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:44:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:44:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:21,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:21,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:21,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845069313] [2021-11-19 15:44:21,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845069313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:21,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:21,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 15:44:21,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271585877] [2021-11-19 15:44:21,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:21,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:44:21,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:44:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:44:21,351 INFO L87 Difference]: Start difference. First operand 1504 states and 6200 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:21,685 INFO L93 Difference]: Finished difference Result 1954 states and 7729 transitions. [2021-11-19 15:44:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:44:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 29 [2021-11-19 15:44:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:21,711 INFO L225 Difference]: With dead ends: 1954 [2021-11-19 15:44:21,711 INFO L226 Difference]: Without dead ends: 1888 [2021-11-19 15:44:21,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:44:21,716 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:21,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:44:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-11-19 15:44:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1732. [2021-11-19 15:44:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 4.056036972848065) internal successors, (7021), 1731 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 7021 transitions. [2021-11-19 15:44:21,841 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 7021 transitions. Word has length 29 [2021-11-19 15:44:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:21,842 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 7021 transitions. [2021-11-19 15:44:21,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 7021 transitions. [2021-11-19 15:44:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 15:44:21,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:21,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:21,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:22,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:22,074 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash 226263611, now seen corresponding path program 1 times [2021-11-19 15:44:22,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:22,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754309117] [2021-11-19 15:44:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:22,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:22,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:22,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:44:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:22,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:44:22,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:22,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:22,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:22,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754309117] [2021-11-19 15:44:22,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754309117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:22,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [679971713] [2021-11-19 15:44:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:22,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:44:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:44:22,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:44:22,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-19 15:44:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:44:22,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:22,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:23,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [679971713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:23,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:44:23,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-19 15:44:23,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879172675] [2021-11-19 15:44:23,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:23,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:44:23,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:44:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:44:23,059 INFO L87 Difference]: Start difference. First operand 1732 states and 7021 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:23,547 INFO L93 Difference]: Finished difference Result 2460 states and 9547 transitions. [2021-11-19 15:44:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:44:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-19 15:44:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:23,580 INFO L225 Difference]: With dead ends: 2460 [2021-11-19 15:44:23,580 INFO L226 Difference]: Without dead ends: 2358 [2021-11-19 15:44:23,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:44:23,582 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:23,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 18 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:44:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-11-19 15:44:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2128. [2021-11-19 15:44:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 4.017865538316879) internal successors, (8546), 2127 states have internal predecessors, (8546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 8546 transitions. [2021-11-19 15:44:23,705 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 8546 transitions. Word has length 31 [2021-11-19 15:44:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 8546 transitions. [2021-11-19 15:44:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 8546 transitions. [2021-11-19 15:44:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 15:44:23,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:23,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:23,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:23,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-19 15:44:24,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:44:24,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:24,139 INFO L85 PathProgramCache]: Analyzing trace with hash -118072285, now seen corresponding path program 1 times [2021-11-19 15:44:24,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:24,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264354338] [2021-11-19 15:44:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:24,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:24,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:24,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:44:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:44:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:24,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:24,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:24,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264354338] [2021-11-19 15:44:24,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264354338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:24,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:24,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 15:44:24,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769477671] [2021-11-19 15:44:24,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:24,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:44:24,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:44:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:44:24,713 INFO L87 Difference]: Start difference. First operand 2128 states and 8546 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:25,230 INFO L93 Difference]: Finished difference Result 2893 states and 11163 transitions. [2021-11-19 15:44:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:44:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-19 15:44:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:25,272 INFO L225 Difference]: With dead ends: 2893 [2021-11-19 15:44:25,272 INFO L226 Difference]: Without dead ends: 2756 [2021-11-19 15:44:25,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:44:25,274 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:25,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 24 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:44:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-11-19 15:44:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2444. [2021-11-19 15:44:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.9975440032746623) internal successors, (9766), 2443 states have internal predecessors, (9766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 9766 transitions. [2021-11-19 15:44:25,443 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 9766 transitions. Word has length 31 [2021-11-19 15:44:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:25,444 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 9766 transitions. [2021-11-19 15:44:25,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 9766 transitions. [2021-11-19 15:44:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:25,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:25,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:25,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:25,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:25,669 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1276858921, now seen corresponding path program 1 times [2021-11-19 15:44:25,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:25,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322288354] [2021-11-19 15:44:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:25,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:25,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:25,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:25,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:44:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:25,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:44:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:26,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:27,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:27,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322288354] [2021-11-19 15:44:27,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322288354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:27,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [428269735] [2021-11-19 15:44:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:27,088 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:44:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:44:27,094 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:44:27,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 15:44:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:27,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:44:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:27,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:28,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [428269735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:28,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850727302] [2021-11-19 15:44:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:28,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:44:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:44:28,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:44:28,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 15:44:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:44:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:28,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:28,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850727302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:28,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:44:28,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-19 15:44:28,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888533887] [2021-11-19 15:44:28,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:44:28,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 15:44:28,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 15:44:28,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:44:28,999 INFO L87 Difference]: Start difference. First operand 2444 states and 9766 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:34,166 INFO L93 Difference]: Finished difference Result 7350 states and 29439 transitions. [2021-11-19 15:44:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 15:44:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:44:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:34,308 INFO L225 Difference]: With dead ends: 7350 [2021-11-19 15:44:34,308 INFO L226 Difference]: Without dead ends: 6628 [2021-11-19 15:44:34,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 15:44:34,311 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 419 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:34,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 15:44:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2021-11-19 15:44:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 2438. [2021-11-19 15:44:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2437 states have (on average 4.003282724661469) internal successors, (9756), 2437 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 9756 transitions. [2021-11-19 15:44:34,561 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 9756 transitions. Word has length 32 [2021-11-19 15:44:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:34,562 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 9756 transitions. [2021-11-19 15:44:34,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 9756 transitions. [2021-11-19 15:44:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:34,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:34,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:34,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:34,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:34,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 15:44:35,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:35,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1192871517, now seen corresponding path program 2 times [2021-11-19 15:44:35,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:35,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502618219] [2021-11-19 15:44:35,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:44:35,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:35,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:35,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:35,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:44:35,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:44:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:44:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:44:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:35,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:36,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:36,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502618219] [2021-11-19 15:44:36,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502618219] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:44:36,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:44:36,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-19 15:44:36,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357918792] [2021-11-19 15:44:36,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:36,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:44:36,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:44:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:44:36,193 INFO L87 Difference]: Start difference. First operand 2438 states and 9756 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-11-19 15:44:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:37,878 INFO L93 Difference]: Finished difference Result 4394 states and 16729 transitions. [2021-11-19 15:44:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 15:44:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 32 [2021-11-19 15:44:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:37,902 INFO L225 Difference]: With dead ends: 4394 [2021-11-19 15:44:37,902 INFO L226 Difference]: Without dead ends: 4196 [2021-11-19 15:44:37,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:44:37,904 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 166 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:37,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 2 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 15:44:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-11-19 15:44:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 2474. [2021-11-19 15:44:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 4.004852405984634) internal successors, (9904), 2473 states have internal predecessors, (9904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 9904 transitions. [2021-11-19 15:44:38,047 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 9904 transitions. Word has length 32 [2021-11-19 15:44:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:38,047 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 9904 transitions. [2021-11-19 15:44:38,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-11-19 15:44:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 9904 transitions. [2021-11-19 15:44:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:38,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:38,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:38,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:38,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:38,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1297865543, now seen corresponding path program 3 times [2021-11-19 15:44:38,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:38,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183018094] [2021-11-19 15:44:38,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:44:38,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:38,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:38,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:38,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:44:38,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:44:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:44:38,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:44:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:44:39,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:44:39,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:39,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183018094] [2021-11-19 15:44:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183018094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:39,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:39,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 15:44:39,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290163018] [2021-11-19 15:44:39,486 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:39,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:44:39,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:44:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:44:39,488 INFO L87 Difference]: Start difference. First operand 2474 states and 9904 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:41,577 INFO L93 Difference]: Finished difference Result 5474 states and 21251 transitions. [2021-11-19 15:44:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:44:41,578 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:44:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:41,611 INFO L225 Difference]: With dead ends: 5474 [2021-11-19 15:44:41,612 INFO L226 Difference]: Without dead ends: 5352 [2021-11-19 15:44:41,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:44:41,613 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 453 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:41,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 0 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:44:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2021-11-19 15:44:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 2744. [2021-11-19 15:44:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 3.968282901932191) internal successors, (10885), 2743 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 10885 transitions. [2021-11-19 15:44:41,793 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 10885 transitions. Word has length 32 [2021-11-19 15:44:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:41,793 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 10885 transitions. [2021-11-19 15:44:41,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 10885 transitions. [2021-11-19 15:44:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:41,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:41,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:41,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:42,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:42,024 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash -702258523, now seen corresponding path program 4 times [2021-11-19 15:44:42,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:42,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258231892] [2021-11-19 15:44:42,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:44:42,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:42,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:42,028 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:42,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:44:42,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:44:42,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:44:42,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:44:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:42,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:42,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:42,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258231892] [2021-11-19 15:44:42,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258231892] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:44:42,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:44:42,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-19 15:44:42,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451615897] [2021-11-19 15:44:42,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:42,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:44:42,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:44:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:44:42,911 INFO L87 Difference]: Start difference. First operand 2744 states and 10885 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-11-19 15:44:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:44,158 INFO L93 Difference]: Finished difference Result 3726 states and 13986 transitions. [2021-11-19 15:44:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:44:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 32 [2021-11-19 15:44:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:44,179 INFO L225 Difference]: With dead ends: 3726 [2021-11-19 15:44:44,179 INFO L226 Difference]: Without dead ends: 3528 [2021-11-19 15:44:44,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:44:44,181 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 140 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:44,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 5 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 15:44:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-19 15:44:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2484. [2021-11-19 15:44:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 3.8892468787756744) internal successors, (9657), 2483 states have internal predecessors, (9657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 9657 transitions. [2021-11-19 15:44:44,294 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 9657 transitions. Word has length 32 [2021-11-19 15:44:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:44,294 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 9657 transitions. [2021-11-19 15:44:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-11-19 15:44:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 9657 transitions. [2021-11-19 15:44:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:44,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:44,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:44,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:44,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:44,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1788478537, now seen corresponding path program 5 times [2021-11-19 15:44:44,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:44,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900984941] [2021-11-19 15:44:44,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:44:44,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:44,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:44,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:44:44,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:44:44,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:44:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:44:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:45,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:46,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:46,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900984941] [2021-11-19 15:44:46,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900984941] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:44:46,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:44:46,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-11-19 15:44:46,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93709195] [2021-11-19 15:44:46,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:46,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:44:46,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:44:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:44:46,473 INFO L87 Difference]: Start difference. First operand 2484 states and 9657 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-11-19 15:44:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:47,577 INFO L93 Difference]: Finished difference Result 3014 states and 11301 transitions. [2021-11-19 15:44:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:44:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 32 [2021-11-19 15:44:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:47,590 INFO L225 Difference]: With dead ends: 3014 [2021-11-19 15:44:47,590 INFO L226 Difference]: Without dead ends: 2974 [2021-11-19 15:44:47,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:44:47,592 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 133 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:47,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:44:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2021-11-19 15:44:47,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2622. [2021-11-19 15:44:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2621 states have (on average 3.848912628767646) internal successors, (10088), 2621 states have internal predecessors, (10088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 10088 transitions. [2021-11-19 15:44:47,699 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 10088 transitions. Word has length 32 [2021-11-19 15:44:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:47,700 INFO L470 AbstractCegarLoop]: Abstraction has 2622 states and 10088 transitions. [2021-11-19 15:44:47,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-11-19 15:44:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 10088 transitions. [2021-11-19 15:44:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:47,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:47,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:47,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:47,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:47,924 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash 515544829, now seen corresponding path program 6 times [2021-11-19 15:44:47,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:47,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465340496] [2021-11-19 15:44:47,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:44:47,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:47,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:47,925 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:47,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:44:48,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 15:44:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:44:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:44:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:44:48,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:44:48,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:48,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465340496] [2021-11-19 15:44:48,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465340496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:48,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:48,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 15:44:48,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066557600] [2021-11-19 15:44:48,604 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:44:48,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:48,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:44:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:44:48,605 INFO L87 Difference]: Start difference. First operand 2622 states and 10088 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:50,565 INFO L93 Difference]: Finished difference Result 4640 states and 17428 transitions. [2021-11-19 15:44:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:44:50,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:44:50,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:50,576 INFO L225 Difference]: With dead ends: 4640 [2021-11-19 15:44:50,576 INFO L226 Difference]: Without dead ends: 4546 [2021-11-19 15:44:50,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:44:50,577 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 445 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:50,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 2 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 15:44:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2021-11-19 15:44:50,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 2496. [2021-11-19 15:44:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 3.85811623246493) internal successors, (9626), 2495 states have internal predecessors, (9626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 9626 transitions. [2021-11-19 15:44:50,685 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 9626 transitions. Word has length 32 [2021-11-19 15:44:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:50,685 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 9626 transitions. [2021-11-19 15:44:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 9626 transitions. [2021-11-19 15:44:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:50,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:50,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:50,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:50,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:50,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1998409909, now seen corresponding path program 7 times [2021-11-19 15:44:50,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:50,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848030366] [2021-11-19 15:44:50,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 15:44:50,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:50,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:50,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:50,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:44:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:44:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:44:51,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:44:51,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:51,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848030366] [2021-11-19 15:44:51,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848030366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:51,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:51,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 15:44:51,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693824937] [2021-11-19 15:44:51,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:51,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:44:51,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:44:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:44:51,503 INFO L87 Difference]: Start difference. First operand 2496 states and 9626 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:52,926 INFO L93 Difference]: Finished difference Result 3336 states and 13202 transitions. [2021-11-19 15:44:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 15:44:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:44:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:52,936 INFO L225 Difference]: With dead ends: 3336 [2021-11-19 15:44:52,936 INFO L226 Difference]: Without dead ends: 3237 [2021-11-19 15:44:52,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:44:52,937 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 233 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:52,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 0 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 15:44:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-11-19 15:44:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2255. [2021-11-19 15:44:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.9551907719609583) internal successors, (8915), 2254 states have internal predecessors, (8915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 8915 transitions. [2021-11-19 15:44:53,069 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 8915 transitions. Word has length 32 [2021-11-19 15:44:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:53,069 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 8915 transitions. [2021-11-19 15:44:53,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 8915 transitions. [2021-11-19 15:44:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:53,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:53,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:53,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:53,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:53,300 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash 174497865, now seen corresponding path program 1 times [2021-11-19 15:44:53,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:53,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919820219] [2021-11-19 15:44:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:53,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:53,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:53,303 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:53,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:44:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:44:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:53,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:53,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:53,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919820219] [2021-11-19 15:44:53,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919820219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:53,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568834451] [2021-11-19 15:44:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:53,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:44:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:44:53,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:44:53,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:44:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:53,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:44:53,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:54,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:54,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568834451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:54,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518018084] [2021-11-19 15:44:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:54,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:44:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:44:54,229 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:44:54,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 15:44:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:44:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:54,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:44:54,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518018084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:54,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:44:54,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 6, 9, 7] total 19 [2021-11-19 15:44:54,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732467690] [2021-11-19 15:44:54,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:44:54,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 15:44:54,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 15:44:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:44:54,803 INFO L87 Difference]: Start difference. First operand 2255 states and 8915 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:58,759 INFO L93 Difference]: Finished difference Result 4001 states and 15589 transitions. [2021-11-19 15:44:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 15:44:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:44:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:58,774 INFO L225 Difference]: With dead ends: 4001 [2021-11-19 15:44:58,774 INFO L226 Difference]: Without dead ends: 4001 [2021-11-19 15:44:58,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 15:44:58,776 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 277 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:58,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 20 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 15:44:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-11-19 15:44:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2423. [2021-11-19 15:44:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 4.062758051197357) internal successors, (9840), 2422 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 9840 transitions. [2021-11-19 15:44:58,874 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 9840 transitions. Word has length 32 [2021-11-19 15:44:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:58,874 INFO L470 AbstractCegarLoop]: Abstraction has 2423 states and 9840 transitions. [2021-11-19 15:44:58,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 9840 transitions. [2021-11-19 15:44:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:44:58,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:58,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:58,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:59,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 15:44:59,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:59,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:44:59,499 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:44:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1407559557, now seen corresponding path program 2 times [2021-11-19 15:44:59,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:59,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32617067] [2021-11-19 15:44:59,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:44:59,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:59,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:59,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:44:59,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:44:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:44:59,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:44:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:45:00,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:45:00,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:00,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32617067] [2021-11-19 15:45:00,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32617067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:00,278 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:00,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 15:45:00,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695514281] [2021-11-19 15:45:00,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:00,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:45:00,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:00,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:45:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:45:00,280 INFO L87 Difference]: Start difference. First operand 2423 states and 9840 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:03,207 INFO L93 Difference]: Finished difference Result 9365 states and 35681 transitions. [2021-11-19 15:45:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 15:45:03,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 32 [2021-11-19 15:45:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:03,242 INFO L225 Difference]: With dead ends: 9365 [2021-11-19 15:45:03,243 INFO L226 Difference]: Without dead ends: 9009 [2021-11-19 15:45:03,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=335, Invalid=925, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 15:45:03,244 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 606 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:03,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 3 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 15:45:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9009 states. [2021-11-19 15:45:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9009 to 3211. [2021-11-19 15:45:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 3210 states have (on average 4.296573208722742) internal successors, (13792), 3210 states have internal predecessors, (13792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 13792 transitions. [2021-11-19 15:45:03,480 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 13792 transitions. Word has length 32 [2021-11-19 15:45:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:03,480 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 13792 transitions. [2021-11-19 15:45:03,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 13792 transitions. [2021-11-19 15:45:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:45:03,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:03,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:03,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 15:45:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:03,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 770017875, now seen corresponding path program 3 times [2021-11-19 15:45:03,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:03,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931021186] [2021-11-19 15:45:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:45:03,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:03,713 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:03,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:45:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:45:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:03,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:45:03,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:45:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:45:04,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:04,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931021186] [2021-11-19 15:45:04,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931021186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:04,510 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:04,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 15:45:04,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863818795] [2021-11-19 15:45:04,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:04,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:45:04,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:04,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:45:04,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:45:04,512 INFO L87 Difference]: Start difference. First operand 3211 states and 13792 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:06,588 INFO L93 Difference]: Finished difference Result 6431 states and 26487 transitions. [2021-11-19 15:45:06,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 15:45:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:45:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:06,607 INFO L225 Difference]: With dead ends: 6431 [2021-11-19 15:45:06,608 INFO L226 Difference]: Without dead ends: 6271 [2021-11-19 15:45:06,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-11-19 15:45:06,609 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 416 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:06,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 0 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 15:45:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2021-11-19 15:45:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 3671. [2021-11-19 15:45:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 4.474931880108992) internal successors, (16423), 3670 states have internal predecessors, (16423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 16423 transitions. [2021-11-19 15:45:06,757 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 16423 transitions. Word has length 32 [2021-11-19 15:45:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:06,758 INFO L470 AbstractCegarLoop]: Abstraction has 3671 states and 16423 transitions. [2021-11-19 15:45:06,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 16423 transitions. [2021-11-19 15:45:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:45:06,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:06,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:06,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:07,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:07,005 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1922488577, now seen corresponding path program 4 times [2021-11-19 15:45:07,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:07,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717697776] [2021-11-19 15:45:07,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:45:07,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:07,009 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:07,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:45:07,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:45:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:45:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:45:07,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:45:07,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717697776] [2021-11-19 15:45:07,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717697776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:07,642 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:07,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 15:45:07,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155019986] [2021-11-19 15:45:07,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:45:07,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:45:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:45:07,644 INFO L87 Difference]: Start difference. First operand 3671 states and 16423 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:10,056 INFO L93 Difference]: Finished difference Result 8489 states and 34411 transitions. [2021-11-19 15:45:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 15:45:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 32 [2021-11-19 15:45:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:10,077 INFO L225 Difference]: With dead ends: 8489 [2021-11-19 15:45:10,077 INFO L226 Difference]: Without dead ends: 8143 [2021-11-19 15:45:10,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:45:10,078 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 421 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:10,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 0 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 15:45:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2021-11-19 15:45:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 3419. [2021-11-19 15:45:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 4.388823873610298) internal successors, (15001), 3418 states have internal predecessors, (15001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 15001 transitions. [2021-11-19 15:45:10,221 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 15001 transitions. Word has length 32 [2021-11-19 15:45:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:10,221 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 15001 transitions. [2021-11-19 15:45:10,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 15001 transitions. [2021-11-19 15:45:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:45:10,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:10,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:10,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:10,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:10,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1277153901, now seen corresponding path program 5 times [2021-11-19 15:45:10,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:10,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140990854] [2021-11-19 15:45:10,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:45:10,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:10,481 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:10,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:45:10,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:45:10,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:45:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:11,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:12,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:12,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140990854] [2021-11-19 15:45:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140990854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:12,160 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:12,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-19 15:45:12,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690932869] [2021-11-19 15:45:12,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:45:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:45:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:45:12,162 INFO L87 Difference]: Start difference. First operand 3419 states and 15001 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:16,331 INFO L93 Difference]: Finished difference Result 7649 states and 32426 transitions. [2021-11-19 15:45:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 15:45:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 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 32 [2021-11-19 15:45:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:16,355 INFO L225 Difference]: With dead ends: 7649 [2021-11-19 15:45:16,355 INFO L226 Difference]: Without dead ends: 7403 [2021-11-19 15:45:16,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-11-19 15:45:16,357 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 371 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:16,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 0 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 15:45:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7403 states. [2021-11-19 15:45:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7403 to 4285. [2021-11-19 15:45:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 4284 states have (on average 4.494631185807656) internal successors, (19255), 4284 states have internal predecessors, (19255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 19255 transitions. [2021-11-19 15:45:16,549 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 19255 transitions. Word has length 32 [2021-11-19 15:45:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:16,549 INFO L470 AbstractCegarLoop]: Abstraction has 4285 states and 19255 transitions. [2021-11-19 15:45:16,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 19255 transitions. [2021-11-19 15:45:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:45:16,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:16,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:16,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:16,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:16,771 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash -473009277, now seen corresponding path program 6 times [2021-11-19 15:45:16,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:16,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341741111] [2021-11-19 15:45:16,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:45:16,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:16,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:16,773 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:16,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:45:17,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 15:45:17,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:45:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:17,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:17,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341741111] [2021-11-19 15:45:17,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341741111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:17,770 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:17,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 15:45:17,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054837615] [2021-11-19 15:45:17,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:17,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:45:17,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:45:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:45:17,771 INFO L87 Difference]: Start difference. First operand 4285 states and 19255 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:20,107 INFO L93 Difference]: Finished difference Result 7167 states and 31389 transitions. [2021-11-19 15:45:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:45:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:45:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:20,130 INFO L225 Difference]: With dead ends: 7167 [2021-11-19 15:45:20,130 INFO L226 Difference]: Without dead ends: 7011 [2021-11-19 15:45:20,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-11-19 15:45:20,131 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 215 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:20,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 15:45:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7011 states. [2021-11-19 15:45:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7011 to 4803. [2021-11-19 15:45:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 4.455018742190754) internal successors, (21393), 4802 states have internal predecessors, (21393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 21393 transitions. [2021-11-19 15:45:20,279 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 21393 transitions. Word has length 32 [2021-11-19 15:45:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:20,280 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 21393 transitions. [2021-11-19 15:45:20,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 21393 transitions. [2021-11-19 15:45:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:45:20,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:20,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:20,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:20,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:20,497 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1381980887, now seen corresponding path program 7 times [2021-11-19 15:45:20,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:20,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52740676] [2021-11-19 15:45:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 15:45:20,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:20,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:20,500 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:20,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:45:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:45:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:20,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:21,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:21,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52740676] [2021-11-19 15:45:21,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52740676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:21,241 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:21,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 15:45:21,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176453675] [2021-11-19 15:45:21,242 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:21,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:45:21,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:45:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:45:21,244 INFO L87 Difference]: Start difference. First operand 4803 states and 21393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:23,060 INFO L93 Difference]: Finished difference Result 7093 states and 29296 transitions. [2021-11-19 15:45:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:45:23,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 15:45:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:23,078 INFO L225 Difference]: With dead ends: 7093 [2021-11-19 15:45:23,079 INFO L226 Difference]: Without dead ends: 5800 [2021-11-19 15:45:23,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:45:23,080 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 362 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:23,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 0 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 15:45:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5800 states. [2021-11-19 15:45:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5800 to 2320. [2021-11-19 15:45:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 4.193186718413109) internal successors, (9724), 2319 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 9724 transitions. [2021-11-19 15:45:23,205 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 9724 transitions. Word has length 32 [2021-11-19 15:45:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:23,206 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 9724 transitions. [2021-11-19 15:45:23,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 9724 transitions. [2021-11-19 15:45:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:23,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:23,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:23,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:23,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:23,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:23,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2056838241, now seen corresponding path program 1 times [2021-11-19 15:45:23,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:23,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239446725] [2021-11-19 15:45:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:23,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:23,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:23,433 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:23,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 15:45:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:23,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:45:23,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:24,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:24,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:24,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239446725] [2021-11-19 15:45:24,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239446725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:24,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [843412197] [2021-11-19 15:45:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:24,553 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:45:24,554 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:45:24,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 15:45:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:45:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:25,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [843412197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:25,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404770933] [2021-11-19 15:45:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:25,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:45:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:45:25,583 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:45:25,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 15:45:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 15:45:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:26,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:26,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404770933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:26,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:45:26,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 9, 9] total 22 [2021-11-19 15:45:26,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003382464] [2021-11-19 15:45:26,757 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:45:26,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 15:45:26,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:26,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 15:45:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:45:26,759 INFO L87 Difference]: Start difference. First operand 2320 states and 9724 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:30,785 INFO L93 Difference]: Finished difference Result 6054 states and 25038 transitions. [2021-11-19 15:45:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:45:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 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 35 [2021-11-19 15:45:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:30,805 INFO L225 Difference]: With dead ends: 6054 [2021-11-19 15:45:30,805 INFO L226 Difference]: Without dead ends: 6054 [2021-11-19 15:45:30,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:45:30,806 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 401 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:30,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 44 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 15:45:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2021-11-19 15:45:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 2354. [2021-11-19 15:45:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 4.1151721206969825) internal successors, (9683), 2353 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 9683 transitions. [2021-11-19 15:45:30,895 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 9683 transitions. Word has length 35 [2021-11-19 15:45:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 9683 transitions. [2021-11-19 15:45:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 9683 transitions. [2021-11-19 15:45:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:30,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:30,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:30,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:31,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:31,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:31,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:45:31,505 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1029007940, now seen corresponding path program 1 times [2021-11-19 15:45:31,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:31,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008232700] [2021-11-19 15:45:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:31,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:31,531 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:31,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 15:45:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:31,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:31,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:31,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:31,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008232700] [2021-11-19 15:45:31,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008232700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:31,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:31,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 15:45:31,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304638422] [2021-11-19 15:45:31,946 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:31,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:45:31,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:31,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:45:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:31,948 INFO L87 Difference]: Start difference. First operand 2354 states and 9683 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:32,925 INFO L93 Difference]: Finished difference Result 3996 states and 16179 transitions. [2021-11-19 15:45:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:45:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:45:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:32,942 INFO L225 Difference]: With dead ends: 3996 [2021-11-19 15:45:32,942 INFO L226 Difference]: Without dead ends: 3892 [2021-11-19 15:45:32,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:45:32,944 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 154 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:32,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 19 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:45:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-11-19 15:45:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 2444. [2021-11-19 15:45:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 4.0749079001228) internal successors, (9955), 2443 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 9955 transitions. [2021-11-19 15:45:33,047 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 9955 transitions. Word has length 35 [2021-11-19 15:45:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:33,048 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 9955 transitions. [2021-11-19 15:45:33,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 9955 transitions. [2021-11-19 15:45:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:33,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:33,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:33,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:33,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:33,270 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:33,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1665818360, now seen corresponding path program 2 times [2021-11-19 15:45:33,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:33,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731056130] [2021-11-19 15:45:33,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:45:33,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:33,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:33,272 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:33,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 15:45:33,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:45:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:33,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:33,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:33,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:33,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731056130] [2021-11-19 15:45:33,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731056130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:33,719 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:33,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 15:45:33,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933141805] [2021-11-19 15:45:33,719 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:33,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:33,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:33,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:33,720 INFO L87 Difference]: Start difference. First operand 2444 states and 9955 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:34,345 INFO L93 Difference]: Finished difference Result 3442 states and 13981 transitions. [2021-11-19 15:45:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:45:34,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 35 [2021-11-19 15:45:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:34,354 INFO L225 Difference]: With dead ends: 3442 [2021-11-19 15:45:34,354 INFO L226 Difference]: Without dead ends: 3244 [2021-11-19 15:45:34,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:34,355 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:34,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 14 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:45:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-11-19 15:45:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2290. [2021-11-19 15:45:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 4.035386631716907) internal successors, (9237), 2289 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 9237 transitions. [2021-11-19 15:45:34,409 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 9237 transitions. Word has length 35 [2021-11-19 15:45:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:34,409 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 9237 transitions. [2021-11-19 15:45:34,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 9237 transitions. [2021-11-19 15:45:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:34,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:34,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:34,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:34,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:34,615 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1748550640, now seen corresponding path program 3 times [2021-11-19 15:45:34,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:34,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004473976] [2021-11-19 15:45:34,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:45:34,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:34,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:34,617 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:34,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 15:45:34,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:45:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:34,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:35,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:35,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004473976] [2021-11-19 15:45:35,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004473976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:35,070 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:35,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 15:45:35,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515743105] [2021-11-19 15:45:35,071 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:35,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:45:35,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:35,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:45:35,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:35,072 INFO L87 Difference]: Start difference. First operand 2290 states and 9237 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:35,700 INFO L93 Difference]: Finished difference Result 3084 states and 12493 transitions. [2021-11-19 15:45:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:35,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-11-19 15:45:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:35,710 INFO L225 Difference]: With dead ends: 3084 [2021-11-19 15:45:35,710 INFO L226 Difference]: Without dead ends: 2992 [2021-11-19 15:45:35,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:45:35,711 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 148 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:35,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 8 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:45:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-11-19 15:45:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2132. [2021-11-19 15:45:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 4.085405912717034) internal successors, (8706), 2131 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 8706 transitions. [2021-11-19 15:45:35,768 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 8706 transitions. Word has length 35 [2021-11-19 15:45:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:35,769 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 8706 transitions. [2021-11-19 15:45:35,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 8706 transitions. [2021-11-19 15:45:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:35,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:35,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:35,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:35,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:35,976 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1264186106, now seen corresponding path program 4 times [2021-11-19 15:45:35,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:35,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623720164] [2021-11-19 15:45:35,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:45:35,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:35,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:35,979 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:35,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 15:45:36,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:45:36,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:45:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:36,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:36,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:36,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623720164] [2021-11-19 15:45:36,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623720164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:36,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531542251] [2021-11-19 15:45:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:45:37,000 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:37,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:45:37,001 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:45:37,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-19 15:45:37,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:45:37,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:37,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:45:37,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:37,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:38,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531542251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:38,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783374987] [2021-11-19 15:45:38,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:45:38,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:45:38,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:45:38,192 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:45:38,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 15:45:38,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:45:38,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 15:45:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:38,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:45:39,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783374987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:39,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:45:39,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 10, 9] total 24 [2021-11-19 15:45:39,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996626551] [2021-11-19 15:45:39,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:45:39,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 15:45:39,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 15:45:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:45:39,267 INFO L87 Difference]: Start difference. First operand 2132 states and 8706 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:42,452 INFO L93 Difference]: Finished difference Result 7196 states and 29930 transitions. [2021-11-19 15:45:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 15:45:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 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 35 [2021-11-19 15:45:42,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:42,476 INFO L225 Difference]: With dead ends: 7196 [2021-11-19 15:45:42,476 INFO L226 Difference]: Without dead ends: 7196 [2021-11-19 15:45:42,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 15:45:42,477 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 415 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:42,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 113 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1307 Invalid, 0 Unknown, 142 Unchecked, 2.7s Time] [2021-11-19 15:45:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7196 states. [2021-11-19 15:45:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7196 to 2022. [2021-11-19 15:45:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 4.099455714992578) internal successors, (8285), 2021 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 8285 transitions. [2021-11-19 15:45:42,565 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 8285 transitions. Word has length 35 [2021-11-19 15:45:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:42,565 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 8285 transitions. [2021-11-19 15:45:42,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 8285 transitions. [2021-11-19 15:45:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:42,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:42,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:42,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:42,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:42,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:43,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:45:43,171 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1274846572, now seen corresponding path program 5 times [2021-11-19 15:45:43,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:43,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017232975] [2021-11-19 15:45:43,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:45:43,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:43,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:43,173 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 15:45:43,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 15:45:43,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:43,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:43,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:43,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:43,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017232975] [2021-11-19 15:45:43,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017232975] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:43,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:43,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-19 15:45:43,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810169965] [2021-11-19 15:45:43,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:43,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:43,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:43,615 INFO L87 Difference]: Start difference. First operand 2022 states and 8285 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:44,048 INFO L93 Difference]: Finished difference Result 3306 states and 13126 transitions. [2021-11-19 15:45:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:45:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:44,056 INFO L225 Difference]: With dead ends: 3306 [2021-11-19 15:45:44,056 INFO L226 Difference]: Without dead ends: 3262 [2021-11-19 15:45:44,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:44,057 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:44,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 14 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:45:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-11-19 15:45:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 1924. [2021-11-19 15:45:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 4.137805512220488) internal successors, (7957), 1923 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 7957 transitions. [2021-11-19 15:45:44,105 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 7957 transitions. Word has length 35 [2021-11-19 15:45:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:44,105 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 7957 transitions. [2021-11-19 15:45:44,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 7957 transitions. [2021-11-19 15:45:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:44,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:44,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:44,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:44,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:44,310 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1143599488, now seen corresponding path program 6 times [2021-11-19 15:45:44,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:44,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077552294] [2021-11-19 15:45:44,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:45:44,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:44,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:44,311 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:44,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 15:45:44,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 15:45:44,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:44,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:44,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077552294] [2021-11-19 15:45:44,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077552294] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:44,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:44,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-19 15:45:44,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969214552] [2021-11-19 15:45:44,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:44,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:44,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:44,725 INFO L87 Difference]: Start difference. First operand 1924 states and 7957 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:45,161 INFO L93 Difference]: Finished difference Result 2342 states and 9521 transitions. [2021-11-19 15:45:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:45:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:45:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:45,167 INFO L225 Difference]: With dead ends: 2342 [2021-11-19 15:45:45,167 INFO L226 Difference]: Without dead ends: 2342 [2021-11-19 15:45:45,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:45,168 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:45,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 8 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:45:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-11-19 15:45:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1550. [2021-11-19 15:45:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.9941897998708846) internal successors, (6187), 1549 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 6187 transitions. [2021-11-19 15:45:45,201 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 6187 transitions. Word has length 35 [2021-11-19 15:45:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:45,201 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 6187 transitions. [2021-11-19 15:45:45,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 6187 transitions. [2021-11-19 15:45:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:45,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:45,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:45,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:45,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:45,405 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1837099659, now seen corresponding path program 2 times [2021-11-19 15:45:45,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:45,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566237498] [2021-11-19 15:45:45,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:45:45,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:45,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:45,406 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:45,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 15:45:45,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:45:45,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:45,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:45,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:45,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566237498] [2021-11-19 15:45:45,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566237498] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:45,870 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:45,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 15:45:45,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359763530] [2021-11-19 15:45:45,871 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:45,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:45:45,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:45:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:45,873 INFO L87 Difference]: Start difference. First operand 1550 states and 6187 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:46,603 INFO L93 Difference]: Finished difference Result 2558 states and 10267 transitions. [2021-11-19 15:45:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:46,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 35 [2021-11-19 15:45:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:46,609 INFO L225 Difference]: With dead ends: 2558 [2021-11-19 15:45:46,609 INFO L226 Difference]: Without dead ends: 2546 [2021-11-19 15:45:46,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:45:46,610 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:46,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 11 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:45:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-11-19 15:45:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1650. [2021-11-19 15:45:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.027289266221953) internal successors, (6641), 1649 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:46,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6641 transitions. [2021-11-19 15:45:46,650 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6641 transitions. Word has length 35 [2021-11-19 15:45:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:46,651 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 6641 transitions. [2021-11-19 15:45:46,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6641 transitions. [2021-11-19 15:45:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:46,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:46,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:46,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:46,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:46,855 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1408138401, now seen corresponding path program 3 times [2021-11-19 15:45:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:46,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063300679] [2021-11-19 15:45:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:45:46,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:46,857 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:46,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 15:45:47,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:45:47,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:47,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:47,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:47,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063300679] [2021-11-19 15:45:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063300679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:47,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:47,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:45:47,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118022373] [2021-11-19 15:45:47,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:45:47,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:45:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:47,307 INFO L87 Difference]: Start difference. First operand 1650 states and 6641 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:48,307 INFO L93 Difference]: Finished difference Result 3126 states and 12488 transitions. [2021-11-19 15:45:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:45:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:48,314 INFO L225 Difference]: With dead ends: 3126 [2021-11-19 15:45:48,315 INFO L226 Difference]: Without dead ends: 3126 [2021-11-19 15:45:48,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:45:48,315 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 103 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:48,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 19 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:45:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-11-19 15:45:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 1642. [2021-11-19 15:45:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 4.03290676416819) internal successors, (6618), 1641 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 6618 transitions. [2021-11-19 15:45:48,383 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 6618 transitions. Word has length 35 [2021-11-19 15:45:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:48,384 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 6618 transitions. [2021-11-19 15:45:48,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 6618 transitions. [2021-11-19 15:45:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:48,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:48,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:48,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:48,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:48,601 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1744021793, now seen corresponding path program 4 times [2021-11-19 15:45:48,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:48,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535083501] [2021-11-19 15:45:48,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:45:48,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:48,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:48,603 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:48,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 15:45:48,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:45:48,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:48,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:48,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:48,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:48,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535083501] [2021-11-19 15:45:48,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535083501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:48,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:48,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 15:45:48,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949159538] [2021-11-19 15:45:48,905 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:48,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:48,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:48,906 INFO L87 Difference]: Start difference. First operand 1642 states and 6618 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:49,615 INFO L93 Difference]: Finished difference Result 2502 states and 9988 transitions. [2021-11-19 15:45:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:45:49,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 35 [2021-11-19 15:45:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:49,621 INFO L225 Difference]: With dead ends: 2502 [2021-11-19 15:45:49,621 INFO L226 Difference]: Without dead ends: 2478 [2021-11-19 15:45:49,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:49,622 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 119 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:49,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 12 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:45:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-11-19 15:45:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1630. [2021-11-19 15:45:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 4.036832412523021) internal successors, (6576), 1629 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 6576 transitions. [2021-11-19 15:45:49,660 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 6576 transitions. Word has length 35 [2021-11-19 15:45:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:49,660 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 6576 transitions. [2021-11-19 15:45:49,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 6576 transitions. [2021-11-19 15:45:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:49,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:49,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:49,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:49,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:49,864 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1451182455, now seen corresponding path program 5 times [2021-11-19 15:45:49,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:49,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340250619] [2021-11-19 15:45:49,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:45:49,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:49,867 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:49,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 15:45:50,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:45:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:50,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:50,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:50,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340250619] [2021-11-19 15:45:50,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340250619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:50,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:50,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 15:45:50,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029212771] [2021-11-19 15:45:50,258 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:50,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:45:50,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:45:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:50,259 INFO L87 Difference]: Start difference. First operand 1630 states and 6576 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:51,194 INFO L93 Difference]: Finished difference Result 2758 states and 10843 transitions. [2021-11-19 15:45:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:45:51,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:45:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:51,202 INFO L225 Difference]: With dead ends: 2758 [2021-11-19 15:45:51,202 INFO L226 Difference]: Without dead ends: 2746 [2021-11-19 15:45:51,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:45:51,203 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 173 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:51,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 14 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:45:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-11-19 15:45:51,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1618. [2021-11-19 15:45:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.040816326530612) internal successors, (6534), 1617 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 6534 transitions. [2021-11-19 15:45:51,250 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 6534 transitions. Word has length 35 [2021-11-19 15:45:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:51,250 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 6534 transitions. [2021-11-19 15:45:51,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 6534 transitions. [2021-11-19 15:45:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:45:51,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:51,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:51,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:51,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:51,468 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1880143713, now seen corresponding path program 6 times [2021-11-19 15:45:51,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:51,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725132683] [2021-11-19 15:45:51,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:45:51,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:51,469 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:51,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 15:45:51,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 15:45:51,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:45:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:51,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:51,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:51,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725132683] [2021-11-19 15:45:51,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725132683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:51,858 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:51,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:45:51,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286004102] [2021-11-19 15:45:51,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:51,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:45:51,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:45:51,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:51,861 INFO L87 Difference]: Start difference. First operand 1618 states and 6534 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:52,616 INFO L93 Difference]: Finished difference Result 3448 states and 13447 transitions. [2021-11-19 15:45:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:45:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 35 [2021-11-19 15:45:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:52,624 INFO L225 Difference]: With dead ends: 3448 [2021-11-19 15:45:52,624 INFO L226 Difference]: Without dead ends: 3448 [2021-11-19 15:45:52,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:52,625 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 217 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:52,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 22 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:45:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2021-11-19 15:45:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 1598. [2021-11-19 15:45:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 4.054477144646212) internal successors, (6475), 1597 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 6475 transitions. [2021-11-19 15:45:52,663 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 6475 transitions. Word has length 35 [2021-11-19 15:45:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:52,664 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 6475 transitions. [2021-11-19 15:45:52,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:45:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 6475 transitions. [2021-11-19 15:45:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 15:45:52,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:52,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:52,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-19 15:45:52,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:52,870 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 15:45:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:52,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1807291552, now seen corresponding path program 1 times [2021-11-19 15:45:52,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:52,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391304486] [2021-11-19 15:45:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:52,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:52,872 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:52,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 15:45:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 15:45:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:53,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2021-11-19 15:45:54,731 INFO L354 Elim1Store]: treesize reduction 1262, result has 5.7 percent of original size [2021-11-19 15:45:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 81 treesize of output 101 [2021-11-19 15:48:52,313 WARN L227 SmtUtils]: Spent 2.88m on a formula simplification. DAG size of input: 375 DAG size of output: 127 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:48:52,315 INFO L354 Elim1Store]: treesize reduction 2057, result has 17.4 percent of original size [2021-11-19 15:48:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 123 treesize of output 478 [2021-11-19 15:55:27,553 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-19 15:55:27,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:55:27,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391304486] [2021-11-19 15:55:27,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-19 15:55:27,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [21482695] [2021-11-19 15:55:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:27,556 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:55:27,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:55:27,558 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:55:27,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-19 15:55:27,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-19 15:55:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-19 15:55:28,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:28,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-19 15:55:28,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795990499] [2021-11-19 15:55:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:28,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:55:28,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:55:28,577 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:55:28,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-19 15:55:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:28,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-19 15:55:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:28,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-19 15:55:28,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:55:28,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-19 15:55:28,951 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-19 15:55:28,951 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-19 15:55:28,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-11-19 15:55:28,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2021-11-19 15:55:28,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2021-11-19 15:55:28,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2021-11-19 15:55:28,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2021-11-19 15:55:28,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:29,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-19 15:55:29,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-19 15:55:29,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05809337-407d-4aea-b02d-bd1e480d2ad0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:55:29,576 INFO L732 BasicCegarLoop]: Path program histogram: [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-19 15:55:29,579 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-19 15:55:29,579 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 15:55:29,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 03:55:29 BasicIcfg [2021-11-19 15:55:29,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 15:55:29,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 15:55:29,618 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 15:55:29,618 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 15:55:29,619 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:43:35" (3/4) ... [2021-11-19 15:55:29,622 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 15:55:29,623 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 15:55:29,623 INFO L158 Benchmark]: Toolchain (without parser) took 716770.37ms. Allocated memory was 79.7MB in the beginning and 499.1MB in the end (delta: 419.4MB). Free memory was 45.6MB in the beginning and 153.0MB in the end (delta: -107.4MB). Peak memory consumption was 313.8MB. Max. memory is 16.1GB. [2021-11-19 15:55:29,624 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 79.7MB. Free memory is still 62.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:55:29,624 INFO L158 Benchmark]: CACSL2BoogieTranslator took 738.11ms. Allocated memory is still 79.7MB. Free memory was 45.4MB in the beginning and 62.2MB in the end (delta: -16.8MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-19 15:55:29,625 INFO L158 Benchmark]: Boogie Procedure Inliner took 109.10ms. Allocated memory is still 79.7MB. Free memory was 62.2MB in the beginning and 59.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 15:55:29,625 INFO L158 Benchmark]: Boogie Preprocessor took 87.14ms. Allocated memory is still 79.7MB. Free memory was 59.5MB in the beginning and 57.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 15:55:29,625 INFO L158 Benchmark]: RCFGBuilder took 1468.19ms. Allocated memory is still 79.7MB. Free memory was 57.2MB in the beginning and 47.1MB in the end (delta: 10.1MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2021-11-19 15:55:29,626 INFO L158 Benchmark]: TraceAbstraction took 714350.41ms. Allocated memory was 79.7MB in the beginning and 499.1MB in the end (delta: 419.4MB). Free memory was 46.4MB in the beginning and 154.0MB in the end (delta: -107.7MB). Peak memory consumption was 312.5MB. Max. memory is 16.1GB. [2021-11-19 15:55:29,626 INFO L158 Benchmark]: Witness Printer took 5.01ms. Allocated memory is still 499.1MB. Free memory is still 153.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:55:29,628 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 79.7MB. Free memory is still 62.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 738.11ms. Allocated memory is still 79.7MB. Free memory was 45.4MB in the beginning and 62.2MB in the end (delta: -16.8MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 109.10ms. Allocated memory is still 79.7MB. Free memory was 62.2MB in the beginning and 59.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 87.14ms. Allocated memory is still 79.7MB. Free memory was 59.5MB in the beginning and 57.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1468.19ms. Allocated memory is still 79.7MB. Free memory was 57.2MB in the beginning and 47.1MB in the end (delta: 10.1MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. * TraceAbstraction took 714350.41ms. Allocated memory was 79.7MB in the beginning and 499.1MB in the end (delta: 419.4MB). Free memory was 46.4MB in the beginning and 154.0MB in the end (delta: -107.7MB). Peak memory consumption was 312.5MB. Max. memory is 16.1GB. * Witness Printer took 5.01ms. Allocated memory is still 499.1MB. Free memory is still 153.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 42.2s, 218 PlacesBefore, 49 PlacesAfterwards, 223 TransitionsBefore, 42 TransitionsAfterwards, 2000 CoEnabledTransitionPairs, 8 FixpointIterations, 139 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 31 TrivialYvCompositions, 8 ConcurrentYvCompositions, 12 ChoiceCompositions, 217 TotalNumberOfCompositions, 4258 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2926, positive: 2812, positive conditional: 0, positive unconditional: 2812, negative: 114, negative conditional: 0, negative unconditional: 114, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1299, positive: 1273, positive conditional: 0, positive unconditional: 1273, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1299, positive: 1272, positive conditional: 0, positive unconditional: 1272, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 27, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1348, positive: 105, positive conditional: 0, positive unconditional: 105, negative: 1243, negative conditional: 0, negative unconditional: 1243, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2926, positive: 1539, positive conditional: 0, positive unconditional: 1539, negative: 88, negative conditional: 0, negative unconditional: 88, unknown: 1299, unknown conditional: 0, unknown unconditional: 1299] , Statistics on independence cache: Total cache size (in pairs): 198, Positive cache size: 185, Positive conditional cache size: 0, Positive unconditional cache size: 185, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 152]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 int *q1, *q2; [L42] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, C, total; [L126] 0 pthread_t t1, t2, t3, t4; [L128] 0 C = __VERIFIER_nondet_int() [L129] 0 N = __VERIFIER_nondet_int() [L130] 0 n1 = __VERIFIER_nondet_int() [L131] 0 n2 = __VERIFIER_nondet_int() [L132] 0 q1_front = __VERIFIER_nondet_int() [L133] 0 q1_back = q1_front [L134] 0 q2_front = __VERIFIER_nondet_int() [L135] 0 q2_back = q2_front [L136] CALL, EXPR 0 create_fresh_int_array(n1) [L158] CALL 0 assume_abort_if_not(size >= 0) [L38] COND TRUE 0 !cond [L158] RET 0 assume_abort_if_not(size >= 0) [L159] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L159] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L161] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L162] 0 int i = 0; [L162] COND TRUE 0 i < size [L163] 0 arr[i] = __VERIFIER_nondet_int() [L162] 0 i++ [L162] COND FALSE 0 !(i < size) [L165] 0 return arr; [L136] RET, EXPR 0 create_fresh_int_array(n1) [L136] 0 q1 = create_fresh_int_array(n1) [L137] CALL, EXPR 0 create_fresh_int_array(n2) [L158] CALL 0 assume_abort_if_not(size >= 0) [L38] COND TRUE 0 !cond [L158] RET 0 assume_abort_if_not(size >= 0) [L159] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L159] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L161] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L162] 0 int i = 0; [L162] COND TRUE 0 i < size [L163] 0 arr[i] = __VERIFIER_nondet_int() [L162] 0 i++ [L162] COND FALSE 0 !(i < size) [L165] 0 return arr; [L137] RET, EXPR 0 create_fresh_int_array(n2) [L137] 0 q2 = create_fresh_int_array(n2) [L139] CALL 0 assume_abort_if_not(C > -2147483648 && N >= 0) [L38] COND TRUE 0 !cond [L139] RET 0 assume_abort_if_not(C > -2147483648 && N >= 0) [L142] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L49] 1 _Bool cond = i < N; [L51] COND TRUE 1 \read(cond) [L53] CALL 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1) [L38] COND TRUE 1 !cond [L53] RET 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1) [L54] EXPR 1 q1[q1_back] [L54] CALL 1 assume_abort_if_not(q1[q1_back] == C) [L38] COND FALSE 1 !(!cond) [L54] RET 1 assume_abort_if_not(q1[q1_back] == C) [L55] 1 q1_back++ [L58] 1 i++ [L61] 1 cond = i < N [L51] COND FALSE 1 !(\read(cond)) [L65] 1 return 0; [L143] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L144] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L91] 3 _Bool cond = i < N || q1_front < q1_back; [L93] COND TRUE 3 \read(cond) [L95] CALL 3 assume_abort_if_not(q1_front < q1_back && q1_front >= 0 && q1_front < n1) [L38] COND FALSE 3 !(!cond) [L95] RET 3 assume_abort_if_not(q1_front < q1_back && q1_front >= 0 && q1_front < n1) [L96] EXPR 3 q1[q1_front] [L96] CALL, EXPR 3 plus(total, q1[q1_front]) [L169] CALL 3 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L38] COND TRUE 3 !cond [L169] RET 3 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L170] CALL 3 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND TRUE 3 !cond [L170] RET 3 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L171] 3 return a + b; [L96] RET, EXPR 3 plus(total, q1[q1_front]) [L96] 3 total = plus(total, q1[q1_front]) [L97] 3 q1_front++ [L145] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L109] 4 _Bool cond = j < N || q2_front < q2_back; [L146] 0 \read(t1) [L146] FCALL, JOIN 1 pthread_join(t1, 0) [L147] 0 \read(t2) [L70] 2 _Bool cond = j < N; [L72] COND TRUE 2 \read(cond) [L74] CALL 2 assume_abort_if_not(q2_back >= 0 && q2_back < n2) [L38] COND FALSE 2 !(!cond) [L74] RET 2 assume_abort_if_not(q2_back >= 0 && q2_back < n2) [L75] EXPR 2 q2[q2_back] [L75] CALL 2 assume_abort_if_not(q2[q2_back] == -C) [L38] COND FALSE 2 !(!cond) [L75] RET 2 assume_abort_if_not(q2[q2_back] == -C) [L76] 2 q2_back++ [L111] COND TRUE 4 \read(cond) [L113] CALL 4 assume_abort_if_not(q2_front < q2_back && q2_front >= 0 && q2_front < n2) [L38] COND TRUE 4 !cond [L113] RET 4 assume_abort_if_not(q2_front < q2_back && q2_front >= 0 && q2_front < n2) [L114] EXPR 4 q2[q2_front] [L114] CALL, EXPR 4 plus(total, q2[q2_front]) [L169] CALL 4 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L38] COND FALSE 4 !(!cond) [L169] RET 4 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L170] CALL 4 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 4 !(!cond) [L170] RET 4 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L171] 4 return a + b; [L114] RET, EXPR 4 plus(total, q2[q2_front]) [L114] 4 total = plus(total, q2[q2_front]) [L115] 4 q2_front++ [L79] 2 j++ [L82] 2 cond = j < N [L118] 4 cond = j < N || q2_front < q2_back [L72] COND FALSE 2 !(\read(cond)) [L86] 2 return 0; [L147] FCALL, JOIN 2 pthread_join(t2, 0) [L148] 0 \read(t3) [L100] 3 cond = i < N || q1_front < q1_back [L104] 3 return 0; [L148] FCALL, JOIN 3 pthread_join(t3, 0) [L149] 0 \read(t4) [L111] COND FALSE 4 !(\read(cond)) [L122] 4 return 0; [L149] FCALL, JOIN 4 pthread_join(t4, 0) [L151] CALL 0 assume_abort_if_not(total != 0) [L38] COND TRUE 0 !cond [L151] RET 0 assume_abort_if_not(total != 0) [L152] 0 reach_error() - UnprovableResult [Line: 144]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 143]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 145]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 142]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 240 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 714.1s, OverallIterations: 32, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.4s, AutomataDifference: 51.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 42.4s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6897 SdHoareTripleChecker+Valid, 40.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6897 mSDsluCounter, 404 SdHoareTripleChecker+Invalid, 34.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 142 IncrementalHoareTripleChecker+Unchecked, 10049 mSDsCounter, 601 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18068 IncrementalHoareTripleChecker+Invalid, 18811 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 601 mSolverCounterUnsat, 124 mSDtfsCounter, 18068 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2847 GetRequests, 2338 SyntacticMatches, 2 SemanticMatches, 507 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2524 ImplicationChecksByTransitivity, 14.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4803occurred in iteration=18, InterpolantAutomatonStates: 422, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 57738 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 597.9s InterpolantComputationTime, 1351 NumberOfCodeBlocks, 1342 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 2548 ConstructedInterpolants, 4 QuantifiedInterpolants, 13430 SizeOfPredicates, 348 NumberOfNonLiveVariables, 6465 ConjunctsInSsa, 362 ConjunctsInUnsatCore, 80 InterpolantComputations, 49 PerfectInterpolantSequences, 227/284 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN