./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:32:43,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:32:43,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:32:43,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:32:43,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:32:43,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:32:43,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:32:43,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:32:43,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:32:43,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:32:43,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:32:43,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:32:43,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:32:43,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:32:43,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:32:43,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:32:43,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:32:43,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:32:43,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:32:43,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:32:43,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:32:43,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:32:43,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:32:43,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:32:43,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:32:43,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:32:43,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:32:43,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:32:43,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:32:43,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:32:43,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:32:43,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:32:43,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:32:43,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:32:43,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:32:43,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:32:43,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:32:43,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:32:43,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:32:43,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:32:43,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:32:43,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:32:43,396 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:32:43,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:32:43,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:32:43,398 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:32:43,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:32:43,399 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:32:43,399 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:32:43,399 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:32:43,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:32:43,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:32:43,401 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:32:43,401 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:32:43,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:32:43,402 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:32:43,402 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:32:43,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:32:43,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:32:43,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:32:43,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:32:43,405 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:32:43,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:32:43,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:32:43,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:32:43,407 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:32:43,407 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:32:43,407 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:32:43,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:32:43,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:32:43,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:32:43,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:32:43,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:32:43,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:32:43,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:43,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:32:43,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:32:43,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:32:43,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:32:43,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:32:43,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:32:43,411 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_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-11-07 01:32:43,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:32:43,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:32:43,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:32:43,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:32:43,810 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:32:43,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-07 01:32:43,893 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/5e08dcac4/3df28bec7a924d8ea2f4975b876af0ca/FLAGe61210fb5 [2021-11-07 01:32:44,487 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:32:44,487 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-07 01:32:44,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/5e08dcac4/3df28bec7a924d8ea2f4975b876af0ca/FLAGe61210fb5 [2021-11-07 01:32:44,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/5e08dcac4/3df28bec7a924d8ea2f4975b876af0ca [2021-11-07 01:32:44,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:32:44,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:32:44,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:44,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:32:44,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:32:44,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:44" (1/1) ... [2021-11-07 01:32:44,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ddbafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:44, skipping insertion in model container [2021-11-07 01:32:44,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:44" (1/1) ... [2021-11-07 01:32:44,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:32:44,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:45,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:45,307 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) [2021-11-07 01:32:45,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20cf3a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:45, skipping insertion in model container [2021-11-07 01:32:45,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:45,309 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:32:45,312 INFO L168 Benchmark]: Toolchain (without parser) took 518.50 ms. Allocated memory is still 111.1 MB. Free memory was 68.7 MB in the beginning and 85.5 MB in the end (delta: -16.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:45,313 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 111.1 MB. Free memory is still 86.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:32:45,315 INFO L168 Benchmark]: CACSL2BoogieTranslator took 515.17 ms. Allocated memory is still 111.1 MB. Free memory was 68.6 MB in the beginning and 85.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:45,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 111.1 MB. Free memory is still 86.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 515.17 ms. Allocated memory is still 111.1 MB. Free memory was 68.6 MB in the beginning and 85.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 526]: 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_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:32:47,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:32:47,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:32:47,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:32:47,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:32:47,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:32:47,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:32:47,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:32:47,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:32:47,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:32:47,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:32:47,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:32:47,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:32:47,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:32:47,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:32:47,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:32:47,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:32:47,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:32:47,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:32:47,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:32:47,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:32:47,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:32:47,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:32:47,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:32:47,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:32:47,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:32:47,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:32:47,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:32:47,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:32:47,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:32:47,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:32:47,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:32:47,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:32:47,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:32:48,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:32:48,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:32:48,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:32:48,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:32:48,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:32:48,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:32:48,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:32:48,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:32:48,061 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:32:48,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:32:48,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:32:48,064 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:32:48,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:32:48,064 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:32:48,065 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:32:48,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:32:48,065 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:32:48,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:32:48,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:32:48,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:32:48,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:32:48,070 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:32:48,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:32:48,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:32:48,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:32:48,071 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:32:48,072 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:32:48,072 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:32:48,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:32:48,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:32:48,074 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:32:48,074 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:32:48,074 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:32:48,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:32:48,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:32:48,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:32:48,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:32:48,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:48,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:32:48,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:32:48,077 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:32:48,077 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:48,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:32:48,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:32:48,078 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_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-11-07 01:32:48,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:32:48,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:32:48,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:32:48,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:32:48,568 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:32:48,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-07 01:32:48,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/e79bb8782/aee45473c4ca43baa269d85b2acd015b/FLAG5a07e04d1 [2021-11-07 01:32:49,306 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:32:49,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-07 01:32:49,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/e79bb8782/aee45473c4ca43baa269d85b2acd015b/FLAG5a07e04d1 [2021-11-07 01:32:49,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/data/e79bb8782/aee45473c4ca43baa269d85b2acd015b [2021-11-07 01:32:49,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:32:49,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:32:49,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:49,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:32:49,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:32:49,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:49" (1/1) ... [2021-11-07 01:32:49,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f09e0e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:49, skipping insertion in model container [2021-11-07 01:32:49,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:49" (1/1) ... [2021-11-07 01:32:49,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:32:49,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:50,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:50,061 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:32:50,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:50,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:50,140 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:32:50,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:50,246 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:32:50,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50 WrapperNode [2021-11-07 01:32:50,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:50,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:32:50,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:32:50,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:32:50,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:32:50,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:32:50,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:32:50,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:32:50,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:32:50,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:32:50,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:32:50,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:32:50,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (1/1) ... [2021-11-07 01:32:50,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:50,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:32:50,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:32:50,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:32:50,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:32:50,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:32:50,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:32:50,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:32:50,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:32:51,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:32:51,062 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 01:32:51,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:51 BoogieIcfgContainer [2021-11-07 01:32:51,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:32:51,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:32:51,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:32:51,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:32:51,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:49" (1/3) ... [2021-11-07 01:32:51,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca2268e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:51, skipping insertion in model container [2021-11-07 01:32:51,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:50" (2/3) ... [2021-11-07 01:32:51,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca2268e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:51, skipping insertion in model container [2021-11-07 01:32:51,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:51" (3/3) ... [2021-11-07 01:32:51,078 INFO L111 eAbstractionObserver]: Analyzing ICFG java_BubbleSort-alloca-1.i [2021-11-07 01:32:51,083 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:32:51,087 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-07 01:32:51,132 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:32:51,137 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:32:51,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-07 01:32:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 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) [2021-11-07 01:32:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:32:51,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:51,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:32:51,158 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:32:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-07 01:32:51,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:51,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594281539] [2021-11-07 01:32:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:51,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:51,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:51,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:32:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:51,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:51,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:51,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:32:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:51,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:51,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:51,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594281539] [2021-11-07 01:32:51,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594281539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:51,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:51,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:32:51,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172424716] [2021-11-07 01:32:51,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:51,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:51,503 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:51,669 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-07 01:32:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:32:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:51,685 INFO L225 Difference]: With dead ends: 40 [2021-11-07 01:32:51,686 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 01:32:51,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 01:32:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-07 01:32:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 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) [2021-11-07 01:32:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-07 01:32:51,745 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-11-07 01:32:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:51,745 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-07 01:32:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-07 01:32:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:32:51,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:51,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:32:51,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:51,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:51,961 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:32:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-07 01:32:51,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:51,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439458088] [2021-11-07 01:32:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:51,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:51,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:51,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:32:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:52,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:52,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:32:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:52,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:52,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:52,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439458088] [2021-11-07 01:32:52,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439458088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:52,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:52,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:32:52,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597727744] [2021-11-07 01:32:52,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:52,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:52,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:52,378 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:53,439 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-11-07 01:32:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:32:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:32:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:53,443 INFO L225 Difference]: With dead ends: 108 [2021-11-07 01:32:53,444 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 01:32:53,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:32:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 01:32:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 42. [2021-11-07 01:32:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-07 01:32:53,454 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-11-07 01:32:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:53,454 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-07 01:32:53,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-07 01:32:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:32:53,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:53,456 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:53,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:53,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:53,668 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:32:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-11-07 01:32:53,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:53,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449630365] [2021-11-07 01:32:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:53,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:53,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:53,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:32:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:53,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:53,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:53,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:53,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:53,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449630365] [2021-11-07 01:32:53,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449630365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:53,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:53,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:53,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857916361] [2021-11-07 01:32:53,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:53,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:53,890 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:53,990 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-07 01:32:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:32:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:32:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:53,993 INFO L225 Difference]: With dead ends: 44 [2021-11-07 01:32:53,993 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 01:32:53,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:32:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 01:32:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-11-07 01:32:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-07 01:32:53,999 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2021-11-07 01:32:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:54,021 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-07 01:32:54,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-07 01:32:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:32:54,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:54,023 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:54,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:54,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:54,236 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:32:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-07 01:32:54,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:54,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771217583] [2021-11-07 01:32:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:54,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:54,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:54,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:54,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:32:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:54,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:54,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:54,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771217583] [2021-11-07 01:32:54,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771217583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:54,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [133513610] [2021-11-07 01:32:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:54,552 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:54,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:54,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:54,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:32:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:54,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:54,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:54,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [133513610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:54,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612291693] [2021-11-07 01:32:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:54,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:54,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:54,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:32:54,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:32:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:54,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:55,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:55,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612291693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:55,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:32:55,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 01:32:55,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947355342] [2021-11-07 01:32:55,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:32:55,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:32:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:32:55,091 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:55,178 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-11-07 01:32:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:32:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:32:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:55,181 INFO L225 Difference]: With dead ends: 75 [2021-11-07 01:32:55,181 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 01:32:55,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:32:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 01:32:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2021-11-07 01:32:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 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) [2021-11-07 01:32:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-07 01:32:55,189 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2021-11-07 01:32:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:55,190 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-07 01:32:55,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-07 01:32:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:32:55,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:55,191 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:55,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:55,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:55,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:55,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:55,813 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:32:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-07 01:32:55,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:55,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277856941] [2021-11-07 01:32:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:55,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:55,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:55,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:32:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:55,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:32:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:55,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:32:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:56,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:57,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:57,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277856941] [2021-11-07 01:32:57,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277856941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:57,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554779598] [2021-11-07 01:32:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:57,010 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:57,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:57,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:32:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:32:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:57,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:32:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:57,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:57,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [554779598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:57,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882499052] [2021-11-07 01:32:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:57,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:57,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:57,829 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:32:57,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 01:32:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:57,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:32:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:58,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:32:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:58,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:58,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882499052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:58,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:32:58,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-07 01:32:58,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193749327] [2021-11-07 01:32:58,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:32:58,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:32:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:32:58,490 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:00,292 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-11-07 01:33:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:33:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:33:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:00,296 INFO L225 Difference]: With dead ends: 116 [2021-11-07 01:33:00,296 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 01:33:00,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:33:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 01:33:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 58. [2021-11-07 01:33:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-11-07 01:33:00,315 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 10 [2021-11-07 01:33:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:00,316 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-11-07 01:33:00,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-11-07 01:33:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:33:00,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:00,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:00,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:00,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:00,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:33:00,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:00,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash 363893197, now seen corresponding path program 1 times [2021-11-07 01:33:00,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:00,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658580943] [2021-11-07 01:33:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:00,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:00,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:00,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:00,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:33:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:01,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:33:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:01,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:03,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658580943] [2021-11-07 01:33:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658580943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:03,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:03,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-07 01:33:03,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042485565] [2021-11-07 01:33:03,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:33:03,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:33:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-07 01:33:03,366 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:03,582 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-07 01:33:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:33:03,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:33:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:03,585 INFO L225 Difference]: With dead ends: 57 [2021-11-07 01:33:03,585 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 01:33:03,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:33:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 01:33:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-07 01:33:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-07 01:33:03,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 13 [2021-11-07 01:33:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:03,593 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-07 01:33:03,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-07 01:33:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:33:03,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:03,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:03,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:03,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:03,796 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash 363893999, now seen corresponding path program 1 times [2021-11-07 01:33:03,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:03,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638799716] [2021-11-07 01:33:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:03,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:03,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:03,799 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:03,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:33:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:33:03,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:04,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:04,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638799716] [2021-11-07 01:33:04,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638799716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:04,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:04,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:04,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647549595] [2021-11-07 01:33:04,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:04,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:04,102 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:04,152 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-11-07 01:33:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:33:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:04,154 INFO L225 Difference]: With dead ends: 57 [2021-11-07 01:33:04,154 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 01:33:04,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:33:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 01:33:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 01:33:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 48 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) [2021-11-07 01:33:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-07 01:33:04,159 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 13 [2021-11-07 01:33:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:04,159 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-07 01:33:04,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-07 01:33:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:33:04,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:04,165 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:04,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:04,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:04,366 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958577, now seen corresponding path program 1 times [2021-11-07 01:33:04,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:04,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176107973] [2021-11-07 01:33:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:04,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:04,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:04,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:33:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:33:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:04,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:33:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:04,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:04,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:04,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176107973] [2021-11-07 01:33:04,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176107973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:04,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:04,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:04,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773676354] [2021-11-07 01:33:04,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:04,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:04,697 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:04,887 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-11-07 01:33:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:33:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:04,889 INFO L225 Difference]: With dead ends: 43 [2021-11-07 01:33:04,889 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 01:33:04,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:33:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 01:33:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-07 01:33:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 42 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) [2021-11-07 01:33:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-11-07 01:33:04,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 13 [2021-11-07 01:33:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:04,901 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-11-07 01:33:04,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-11-07 01:33:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:33:04,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:04,902 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:04,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:05,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:05,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2021-11-07 01:33:05,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:05,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370321962] [2021-11-07 01:33:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:05,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:05,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:05,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:05,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:33:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:05,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:33:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:05,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-07 01:33:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:05,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:06,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:06,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370321962] [2021-11-07 01:33:06,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370321962] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:33:06,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:33:06,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-07 01:33:06,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989165299] [2021-11-07 01:33:06,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:06,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:33:06,577 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:07,134 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-11-07 01:33:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:33:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:33:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:07,136 INFO L225 Difference]: With dead ends: 45 [2021-11-07 01:33:07,136 INFO L226 Difference]: Without dead ends: 45 [2021-11-07 01:33:07,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:33:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-07 01:33:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-11-07 01:33:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 42 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) [2021-11-07 01:33:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-07 01:33:07,142 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 13 [2021-11-07 01:33:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:07,142 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-07 01:33:07,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-07 01:33:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:33:07,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:07,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:07,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:07,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:07,356 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-11-07 01:33:07,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:07,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341926753] [2021-11-07 01:33:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:07,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:07,358 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:07,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:33:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:33:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:33:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:07,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:08,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:08,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341926753] [2021-11-07 01:33:08,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341926753] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:08,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:08,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:33:08,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610578866] [2021-11-07 01:33:08,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:33:08,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:33:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:33:08,573 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:09,823 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2021-11-07 01:33:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:33:09,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:33:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:09,825 INFO L225 Difference]: With dead ends: 87 [2021-11-07 01:33:09,825 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 01:33:09,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:33:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 01:33:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-11-07 01:33:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-07 01:33:09,832 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 14 [2021-11-07 01:33:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:09,832 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-07 01:33:09,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-07 01:33:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:33:09,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:09,834 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:09,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:33:10,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:10,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2021-11-07 01:33:10,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:10,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393671342] [2021-11-07 01:33:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:10,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:10,052 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:10,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:33:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:33:10,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-07 01:33:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:11,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:12,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:12,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393671342] [2021-11-07 01:33:12,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393671342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:12,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1013092269] [2021-11-07 01:33:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:12,227 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:12,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:12,236 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:12,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:33:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:12,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:33:12,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:33:12,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:33:13,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1013092269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:13,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277548562] [2021-11-07 01:33:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:13,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:33:13,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:33:13,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:33:13,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:33:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:33:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:13,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-07 01:33:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:13,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:33:14,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277548562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:14,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:33:14,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 22 [2021-11-07 01:33:14,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190878396] [2021-11-07 01:33:14,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 01:33:14,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 01:33:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:33:14,291 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:19,144 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2021-11-07 01:33:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:33:19,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:33:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:19,146 INFO L225 Difference]: With dead ends: 117 [2021-11-07 01:33:19,146 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 01:33:19,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:33:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 01:33:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2021-11-07 01:33:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.225) internal successors, (98), 81 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-11-07 01:33:19,154 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 18 [2021-11-07 01:33:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:19,155 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-11-07 01:33:19,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-11-07 01:33:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:33:19,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:19,157 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-07 01:33:19,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:19,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-07 01:33:19,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:33:19,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:19,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:19,761 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-11-07 01:33:19,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:19,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965801158] [2021-11-07 01:33:19,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:33:19,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:19,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:19,762 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:19,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:33:20,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:33:20,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:33:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:33:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:20,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:33:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:20,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:22,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:22,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965801158] [2021-11-07 01:33:22,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965801158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:22,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2116914920] [2021-11-07 01:33:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:33:22,500 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:22,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:22,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:33:22,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:33:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:33:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:33:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:23,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:33:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:23,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:24,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2116914920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:24,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109900263] [2021-11-07 01:33:24,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:33:24,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:33:24,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:33:24,557 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:33:24,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 01:33:25,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:33:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:33:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:33:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:33:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:25,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:27,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109900263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:27,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:33:27,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 27 [2021-11-07 01:33:27,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879798637] [2021-11-07 01:33:27,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 01:33:27,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 01:33:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:33:27,669 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:35,191 INFO L93 Difference]: Finished difference Result 519 states and 632 transitions. [2021-11-07 01:33:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:33:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 01:33:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:35,199 INFO L225 Difference]: With dead ends: 519 [2021-11-07 01:33:35,199 INFO L226 Difference]: Without dead ends: 519 [2021-11-07 01:33:35,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=463, Invalid=1097, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:33:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-07 01:33:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 106. [2021-11-07 01:33:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.2307692307692308) internal successors, (128), 105 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2021-11-07 01:33:35,212 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 22 [2021-11-07 01:33:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:35,213 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2021-11-07 01:33:35,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2021-11-07 01:33:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:33:35,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:35,215 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:35,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:35,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:35,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:35,817 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:33:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 1 times [2021-11-07 01:33:35,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:35,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349162331] [2021-11-07 01:33:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:35,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:35,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:35,819 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:35,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:33:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:36,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:33:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:36,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:33:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:33:36,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:33:39,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:39,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349162331] [2021-11-07 01:33:39,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349162331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:39,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1660313855] [2021-11-07 01:33:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:39,024 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:39,024 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:39,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:33:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:39,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:33:39,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:40,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:41,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1660313855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:41,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278019352] [2021-11-07 01:33:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:41,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:33:41,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:33:41,662 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:33:41,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:33:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:42,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:33:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:42,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:33:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:33:42,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:33:44,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278019352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:44,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:33:44,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11, 10, 8, 9] total 35 [2021-11-07 01:33:44,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422512157] [2021-11-07 01:33:44,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 01:33:44,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:44,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 01:33:44,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:33:44,352 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 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) [2021-11-07 01:34:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:01,038 INFO L93 Difference]: Finished difference Result 238 states and 279 transitions. [2021-11-07 01:34:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 01:34:01,039 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 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 23 [2021-11-07 01:34:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:01,040 INFO L225 Difference]: With dead ends: 238 [2021-11-07 01:34:01,041 INFO L226 Difference]: Without dead ends: 238 [2021-11-07 01:34:01,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1115, Invalid=4891, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 01:34:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-07 01:34:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 171. [2021-11-07 01:34:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 169 states have (on average 1.1952662721893492) internal successors, (202), 170 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2021-11-07 01:34:01,053 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 23 [2021-11-07 01:34:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:01,053 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2021-11-07 01:34:01,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 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) [2021-11-07 01:34:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2021-11-07 01:34:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:34:01,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:01,056 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:01,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:01,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:01,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:01,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:01,671 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:34:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1156994876, now seen corresponding path program 1 times [2021-11-07 01:34:01,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:01,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711761335] [2021-11-07 01:34:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:01,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:01,673 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:01,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:34:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:34:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:34:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:34:03,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:34:05,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:05,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711761335] [2021-11-07 01:34:05,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711761335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:05,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1022007559] [2021-11-07 01:34:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:05,367 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:05,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:05,381 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:05,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:34:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:06,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:34:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:34:07,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:34:07,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1022007559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:07,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977360479] [2021-11-07 01:34:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:07,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:07,949 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:34:07,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:34:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:34:08,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:34:09,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:34:10,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977360479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:10,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:34:10,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 9, 7] total 40 [2021-11-07 01:34:10,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484803759] [2021-11-07 01:34:10,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 01:34:10,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 01:34:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:34:10,210 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:48,201 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2021-11-07 01:34:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 01:34:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 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 34 [2021-11-07 01:34:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:48,204 INFO L225 Difference]: With dead ends: 268 [2021-11-07 01:34:48,204 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 01:34:48,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3304 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=1930, Invalid=10060, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 01:34:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 01:34:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 231. [2021-11-07 01:34:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.1877729257641922) internal successors, (272), 230 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 272 transitions. [2021-11-07 01:34:48,218 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 272 transitions. Word has length 34 [2021-11-07 01:34:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:48,218 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 272 transitions. [2021-11-07 01:34:48,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 272 transitions. [2021-11-07 01:34:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:34:48,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:48,222 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:48,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:48,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:48,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:34:48,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:48,837 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:34:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:48,838 INFO L85 PathProgramCache]: Analyzing trace with hash -73696953, now seen corresponding path program 2 times [2021-11-07 01:34:48,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:48,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068279327] [2021-11-07 01:34:48,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:34:48,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:48,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:48,841 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:48,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:34:49,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:34:49,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:34:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:34:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:49,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:34:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:56,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:56,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068279327] [2021-11-07 01:34:56,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068279327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:56,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888894747] [2021-11-07 01:34:56,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:34:56,475 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:56,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:56,476 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:56,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:34:57,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:34:57,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:34:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:34:57,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:34:59,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:35:01,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888894747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:01,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399039839] [2021-11-07 01:35:01,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:35:01,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:35:01,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:01,730 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:35:01,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:35:02,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:35:02,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:35:02,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:35:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:04,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:11,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399039839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:11,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:35:11,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13, 12, 15, 14] total 68 [2021-11-07 01:35:11,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241117210] [2021-11-07 01:35:11,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 01:35:11,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 01:35:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:35:11,884 INFO L87 Difference]: Start difference. First operand 231 states and 272 transitions. Second operand has 68 states, 68 states have (on average 3.073529411764706) internal successors, (209), 68 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:54,488 INFO L93 Difference]: Finished difference Result 718 states and 832 transitions. [2021-11-07 01:35:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 01:35:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.073529411764706) internal successors, (209), 68 states have internal predecessors, (209), 0 states have call successors, (0), 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 42 [2021-11-07 01:35:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:54,494 INFO L225 Difference]: With dead ends: 718 [2021-11-07 01:35:54,494 INFO L226 Difference]: Without dead ends: 716 [2021-11-07 01:35:54,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3689 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=2032, Invalid=10400, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 01:35:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-07 01:35:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 639. [2021-11-07 01:35:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 637 states have (on average 1.1821036106750393) internal successors, (753), 638 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 753 transitions. [2021-11-07 01:35:54,521 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 753 transitions. Word has length 42 [2021-11-07 01:35:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:54,522 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 753 transitions. [2021-11-07 01:35:54,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.073529411764706) internal successors, (209), 68 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 753 transitions. [2021-11-07 01:35:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:35:54,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:54,525 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-07 01:35:54,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 01:35:54,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-07 01:35:54,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:55,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:55,145 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:35:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-11-07 01:35:55,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:55,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231874450] [2021-11-07 01:35:55,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:35:55,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:55,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:55,148 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:55,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:35:56,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 01:35:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:56,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:35:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:56,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:35:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:57,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:02,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:02,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231874450] [2021-11-07 01:36:02,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231874450] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:02,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996711153] [2021-11-07 01:36:02,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:36:02,523 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:02,535 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:02,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:36:05,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 01:36:05,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:36:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:36:05,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:05,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:36:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:07,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:25,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [996711153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:25,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022044303] [2021-11-07 01:36:25,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:36:25,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:36:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:36:25,554 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:36:25,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:36:38,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 01:36:38,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:36:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:36:38,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:38,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:36:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:40,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:54,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022044303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:54,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:36:54,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17, 21, 19, 19] total 72 [2021-11-07 01:36:54,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735839037] [2021-11-07 01:36:54,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-07 01:36:54,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-07 01:36:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1413, Invalid=3843, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 01:36:54,041 INFO L87 Difference]: Start difference. First operand 639 states and 753 transitions. Second operand has 73 states, 72 states have (on average 3.0) internal successors, (216), 73 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:03,776 WARN L207 SmtUtils]: Spent 5.32 s on a formula simplification that was a NOOP. DAG size: 129 [2021-11-07 01:38:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:50,998 INFO L93 Difference]: Finished difference Result 3879 states and 4589 transitions. [2021-11-07 01:38:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 01:38:51,001 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.0) internal successors, (216), 73 states have internal predecessors, (216), 0 states have call successors, (0), 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 46 [2021-11-07 01:38:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:51,024 INFO L225 Difference]: With dead ends: 3879 [2021-11-07 01:38:51,024 INFO L226 Difference]: Without dead ends: 3879 [2021-11-07 01:38:51,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4304 ImplicationChecksByTransitivity, 79.5s TimeCoverageRelationStatistics Valid=2801, Invalid=7099, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 01:38:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-11-07 01:38:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 687. [2021-11-07 01:38:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 685 states have (on average 1.186861313868613) internal successors, (813), 686 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 813 transitions. [2021-11-07 01:38:51,078 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 813 transitions. Word has length 46 [2021-11-07 01:38:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 813 transitions. [2021-11-07 01:38:51,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.0) internal successors, (216), 73 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 813 transitions. [2021-11-07 01:38:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:38:51,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:51,085 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:51,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-07 01:38:51,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:51,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 01:38:51,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:51,692 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:38:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash -917791020, now seen corresponding path program 2 times [2021-11-07 01:38:51,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:51,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849617598] [2021-11-07 01:38:51,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:38:51,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:51,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:51,695 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:51,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:38:52,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:38:52,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:38:52,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:38:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:53,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-07 01:38:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:38:55,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:38:59,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:59,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849617598] [2021-11-07 01:38:59,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849617598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:59,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1781872245] [2021-11-07 01:38:59,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:38:59,522 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:59,523 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:59,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:39:01,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:39:01,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:39:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:39:03,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:39:05,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1781872245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:05,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711157315] [2021-11-07 01:39:05,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:39:05,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:05,835 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:05,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 01:39:07,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:39:07,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:07,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:39:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 01:39:10,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 01:39:14,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711157315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:14,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:39:14,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14, 13, 14, 12] total 66 [2021-11-07 01:39:14,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084947397] [2021-11-07 01:39:14,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 01:39:14,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 01:39:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=3918, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 01:39:14,964 INFO L87 Difference]: Start difference. First operand 687 states and 813 transitions. Second operand has 66 states, 66 states have (on average 3.3484848484848486) internal successors, (221), 66 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:10,958 INFO L93 Difference]: Finished difference Result 1222 states and 1409 transitions. [2021-11-07 01:40:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 01:40:10,961 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.3484848484848486) internal successors, (221), 66 states have internal predecessors, (221), 0 states have call successors, (0), 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 49 [2021-11-07 01:40:10,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:10,968 INFO L225 Difference]: With dead ends: 1222 [2021-11-07 01:40:10,969 INFO L226 Difference]: Without dead ends: 1183 [2021-11-07 01:40:10,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6157 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=3133, Invalid=20123, Unknown=0, NotChecked=0, Total=23256 [2021-11-07 01:40:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-07 01:40:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 649. [2021-11-07 01:40:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 647 states have (on average 1.1561051004636784) internal successors, (748), 648 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 748 transitions. [2021-11-07 01:40:11,008 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 748 transitions. Word has length 49 [2021-11-07 01:40:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:11,008 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 748 transitions. [2021-11-07 01:40:11,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.3484848484848486) internal successors, (221), 66 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,009 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 748 transitions. [2021-11-07 01:40:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:40:11,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:11,011 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:11,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:11,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-07 01:40:11,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:11,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:11,628 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:40:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:11,629 INFO L85 PathProgramCache]: Analyzing trace with hash -557992115, now seen corresponding path program 3 times [2021-11-07 01:40:11,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:11,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723228853] [2021-11-07 01:40:11,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:40:11,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:11,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:11,631 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:11,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:40:13,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:40:13,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:40:13,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:40:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:13,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:40:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 01:40:15,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 01:40:23,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:23,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723228853] [2021-11-07 01:40:23,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723228853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:23,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948325689] [2021-11-07 01:40:23,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:40:23,164 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:23,167 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:23,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:40:27,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:40:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:40:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 01:40:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:40:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 01:40:28,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 01:40:45,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1948325689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:45,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630580309] [2021-11-07 01:40:45,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:40:45,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:45,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:45,973 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 01:40:48,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:40:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:40:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:40:48,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:48,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:40:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 01:40:50,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 01:40:58,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630580309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:58,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:40:58,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 15, 11, 12] total 43 [2021-11-07 01:40:58,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147118709] [2021-11-07 01:40:58,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 01:40:58,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:58,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 01:40:58,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:40:58,511 INFO L87 Difference]: Start difference. First operand 649 states and 748 transitions. Second operand has 44 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:20,234 INFO L93 Difference]: Finished difference Result 806 states and 927 transitions. [2021-11-07 01:42:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 01:42:20,236 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 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 50 [2021-11-07 01:42:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:20,241 INFO L225 Difference]: With dead ends: 806 [2021-11-07 01:42:20,241 INFO L226 Difference]: Without dead ends: 806 [2021-11-07 01:42:20,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 251 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 78.0s TimeCoverageRelationStatistics Valid=2353, Invalid=7349, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 01:42:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-07 01:42:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 783. [2021-11-07 01:42:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 781 states have (on average 1.1613316261203586) internal successors, (907), 782 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 907 transitions. [2021-11-07 01:42:20,270 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 907 transitions. Word has length 50 [2021-11-07 01:42:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:20,270 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 907 transitions. [2021-11-07 01:42:20,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 907 transitions. [2021-11-07 01:42:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:42:20,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:20,273 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:20,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:20,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:20,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:20,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:20,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:42:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -273652577, now seen corresponding path program 3 times [2021-11-07 01:42:20,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:20,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871402940] [2021-11-07 01:42:20,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:42:20,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:20,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:20,892 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:20,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 01:42:23,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:42:23,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:42:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:42:23,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:23,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:42:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:42:25,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:42:31,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:31,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871402940] [2021-11-07 01:42:31,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871402940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:31,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402498013] [2021-11-07 01:42:31,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:42:31,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:31,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:31,983 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:31,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-07 01:42:36,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:42:36,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:42:36,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 01:42:36,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:36,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:42:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 17 proven. 101 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-07 01:42:39,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-07 01:42:59,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402498013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:59,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832061081] [2021-11-07 01:42:59,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:42:59,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:59,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:59,496 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:42:59,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 01:43:02,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:43:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:43:02,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:02,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:43:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:43:04,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:43:15,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832061081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:15,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:43:15,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 14, 17, 11, 13] total 45 [2021-11-07 01:43:15,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038460369] [2021-11-07 01:43:15,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 01:43:15,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:15,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 01:43:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1753, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 01:43:15,343 INFO L87 Difference]: Start difference. First operand 783 states and 907 transitions. Second operand has 46 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:33,624 INFO L93 Difference]: Finished difference Result 1035 states and 1194 transitions. [2021-11-07 01:44:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 01:44:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 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 68 [2021-11-07 01:44:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:33,630 INFO L225 Difference]: With dead ends: 1035 [2021-11-07 01:44:33,631 INFO L226 Difference]: Without dead ends: 1035 [2021-11-07 01:44:33,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 347 SyntacticMatches, 11 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3277 ImplicationChecksByTransitivity, 84.6s TimeCoverageRelationStatistics Valid=2518, Invalid=8402, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 01:44:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-11-07 01:44:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 888. [2021-11-07 01:44:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 886 states have (on average 1.164785553047404) internal successors, (1032), 887 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1032 transitions. [2021-11-07 01:44:33,660 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1032 transitions. Word has length 68 [2021-11-07 01:44:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:33,661 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1032 transitions. [2021-11-07 01:44:33,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1032 transitions. [2021-11-07 01:44:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:44:33,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:33,664 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:33,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:33,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:34,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-07 01:44:34,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:34,289 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:44:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2060965005, now seen corresponding path program 4 times [2021-11-07 01:44:34,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:34,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020980949] [2021-11-07 01:44:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:44:34,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:34,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:34,293 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:34,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:44:37,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:44:37,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:44:37,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:37,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:44:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 01:44:39,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:50,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:50,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020980949] [2021-11-07 01:44:50,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020980949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:50,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1238941391] [2021-11-07 01:44:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:44:50,720 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:50,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:50,721 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:50,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 01:44:54,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:44:54,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:44:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 134 proven. 79 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-07 01:44:58,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 134 proven. 79 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-07 01:45:04,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1238941391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:04,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473952159] [2021-11-07 01:45:04,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:45:04,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:04,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:04,827 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:45:04,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a7ea6-d696-4091-bffb-b8f3285639fe/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 01:45:08,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:45:08,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 01:45:08,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:45:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 01:45:12,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 01:45:21,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473952159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:21,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:45:21,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 18, 16, 19, 18] total 95 [2021-11-07 01:45:21,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625815217] [2021-11-07 01:45:21,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 01:45:21,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:21,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 01:45:21,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=8214, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 01:45:21,098 INFO L87 Difference]: Start difference. First operand 888 states and 1032 transitions. Second operand has 95 states, 95 states have (on average 3.4947368421052634) internal successors, (332), 95 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)