./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/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_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH --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-9ad7fb2 [2021-11-03 04:20:52,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:20:52,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:20:52,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:20:52,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:20:52,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:20:52,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:20:52,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:20:52,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:20:52,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:20:52,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:20:52,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:20:52,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:20:52,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:20:52,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:20:52,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:20:52,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:20:52,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:20:52,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:20:52,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:20:52,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:20:52,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:20:52,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:20:52,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:20:52,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:20:52,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:20:52,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:20:52,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:20:52,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:20:52,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:20:52,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:20:52,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:20:52,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:20:52,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:20:52,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:20:52,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:20:52,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:20:52,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:20:52,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:20:52,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:20:52,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:20:52,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:20:52,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:20:52,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:20:52,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:20:52,369 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:20:52,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:20:52,370 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:20:52,370 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:20:52,370 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:20:52,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:20:52,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:20:52,372 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:20:52,372 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:20:52,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:20:52,373 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:20:52,373 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:20:52,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:20:52,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:20:52,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:20:52,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:20:52,375 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:20:52,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:20:52,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:20:52,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:20:52,376 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:20:52,376 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:20:52,377 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:20:52,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:20:52,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:20:52,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:20:52,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:20:52,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:20:52,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:20:52,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:20:52,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:20:52,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:20:52,379 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:20:52,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:20:52,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:20:52,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:20:52,381 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_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-11-03 04:20:52,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:20:52,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:20:52,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:20:52,692 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:20:52,693 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:20:52,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-03 04:20:52,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/1fa81c408/0144a47604534ebe9872008449d73ac6/FLAG6042f3dc4 [2021-11-03 04:20:53,430 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:20:53,431 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-03 04:20:53,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/1fa81c408/0144a47604534ebe9872008449d73ac6/FLAG6042f3dc4 [2021-11-03 04:20:53,717 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/1fa81c408/0144a47604534ebe9872008449d73ac6 [2021-11-03 04:20:53,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:20:53,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:20:53,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:20:53,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:20:53,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:20:53,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:20:53" (1/1) ... [2021-11-03 04:20:53,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d119aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:53, skipping insertion in model container [2021-11-03 04:20:53,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:20:53" (1/1) ... [2021-11-03 04:20:53,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:20:53,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:20:54,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:20:54,142 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) [2021-11-03 04:20:54,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12071435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:54, skipping insertion in model container [2021-11-03 04:20:54,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:20:54,144 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:20:54,147 INFO L168 Benchmark]: Toolchain (without parser) took 423.11 ms. Allocated memory is still 102.8 MB. Free memory was 70.2 MB in the beginning and 76.7 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:20:54,148 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 102.8 MB. Free memory was 57.6 MB in the beginning and 57.6 MB in the end (delta: 52.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:20:54,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 420.12 ms. Allocated memory is still 102.8 MB. Free memory was 70.0 MB in the beginning and 76.7 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:20:54,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 102.8 MB. Free memory was 57.6 MB in the beginning and 57.6 MB in the end (delta: 52.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 420.12 ms. Allocated memory is still 102.8 MB. Free memory was 70.0 MB in the beginning and 76.7 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 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_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/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_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH --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-9ad7fb2 [2021-11-03 04:20:56,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:20:56,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:20:56,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:20:56,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:20:56,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:20:56,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:20:56,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:20:56,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:20:56,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:20:56,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:20:56,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:20:56,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:20:56,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:20:56,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:20:56,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:20:56,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:20:56,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:20:56,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:20:56,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:20:56,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:20:56,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:20:56,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:20:56,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:20:56,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:20:56,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:20:56,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:20:56,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:20:56,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:20:56,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:20:56,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:20:56,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:20:56,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:20:56,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:20:56,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:20:56,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:20:56,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:20:56,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:20:56,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:20:56,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:20:56,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:20:56,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:20:56,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:20:56,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:20:56,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:20:56,965 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:20:56,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:20:56,966 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:20:56,966 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:20:56,967 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:20:56,967 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:20:56,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:20:56,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:20:56,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:20:56,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:20:56,971 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:20:56,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:20:56,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:20:56,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:20:56,972 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:20:56,972 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:20:56,972 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:20:56,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:20:56,973 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:20:56,973 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:20:56,973 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:20:56,974 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:20:56,974 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:20:56,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:20:56,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:20:56,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:20:56,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:20:56,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:20:56,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:20:56,976 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:20:56,976 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:20:56,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:20:56,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:20:56,977 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_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-11-03 04:20:57,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:20:57,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:20:57,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:20:57,472 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:20:57,473 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:20:57,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-03 04:20:57,560 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/639ee57dc/1a70503ac1a4442bbc7722e3384d41a8/FLAGb3318e57e [2021-11-03 04:20:58,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:20:58,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-03 04:20:58,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/639ee57dc/1a70503ac1a4442bbc7722e3384d41a8/FLAGb3318e57e [2021-11-03 04:20:58,606 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/data/639ee57dc/1a70503ac1a4442bbc7722e3384d41a8 [2021-11-03 04:20:58,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:20:58,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:20:58,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:20:58,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:20:58,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:20:58,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:20:58" (1/1) ... [2021-11-03 04:20:58,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e713d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:58, skipping insertion in model container [2021-11-03 04:20:58,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:20:58" (1/1) ... [2021-11-03 04:20:58,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:20:58,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:20:59,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:20:59,102 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:20:59,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:20:59,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:20:59,184 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:20:59,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:20:59,259 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:20:59,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59 WrapperNode [2021-11-03 04:20:59,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:20:59,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:20:59,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:20:59,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:20:59,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:20:59,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:20:59,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:20:59,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:20:59,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:20:59,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:20:59,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:20:59,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:20:59,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (1/1) ... [2021-11-03 04:20:59,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:20:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:20:59,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:20:59,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:20:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:20:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:20:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:20:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:20:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:20:59,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:21:00,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:21:00,164 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 04:21:00,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:21:00 BoogieIcfgContainer [2021-11-03 04:21:00,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:21:00,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:21:00,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:21:00,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:21:00,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:20:58" (1/3) ... [2021-11-03 04:21:00,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36da44ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:21:00, skipping insertion in model container [2021-11-03 04:21:00,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:59" (2/3) ... [2021-11-03 04:21:00,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36da44ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:21:00, skipping insertion in model container [2021-11-03 04:21:00,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:21:00" (3/3) ... [2021-11-03 04:21:00,178 INFO L111 eAbstractionObserver]: Analyzing ICFG java_BubbleSort-alloca-1.i [2021-11-03 04:21:00,186 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:21:00,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-03 04:21:00,260 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:21:00,273 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 [2021-11-03 04:21:00,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-03 04:21:00,293 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) [2021-11-03 04:21:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:21:00,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:00,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:21:00,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-03 04:21:00,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:00,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355347517] [2021-11-03 04:21:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:00,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:00,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:00,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:00,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:21:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:21:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:00,575 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 [2021-11-03 04:21:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:00,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:00,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:00,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355347517] [2021-11-03 04:21:00,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355347517] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:00,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:00,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:21:00,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499080346] [2021-11-03 04:21:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:21:00,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:00,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:21:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:21:00,679 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) [2021-11-03 04:21:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:00,825 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-03 04:21:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:21:00,827 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 [2021-11-03 04:21:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:00,838 INFO L225 Difference]: With dead ends: 40 [2021-11-03 04:21:00,839 INFO L226 Difference]: Without dead ends: 38 [2021-11-03 04:21:00,840 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 [2021-11-03 04:21:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-03 04:21:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-03 04:21:00,883 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) [2021-11-03 04:21:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-03 04:21:00,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-11-03 04:21:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:00,887 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-03 04:21:00,888 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) [2021-11-03 04:21:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-03 04:21:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:21:00,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:00,889 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:21:00,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 04:21:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:01,092 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-03 04:21:01,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:01,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629585331] [2021-11-03 04:21:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:01,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:01,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:01,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:01,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:21:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:01,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:21:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:01,218 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 [2021-11-03 04:21:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:01,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:01,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:01,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629585331] [2021-11-03 04:21:01,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629585331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:01,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:01,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:21:01,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008054033] [2021-11-03 04:21:01,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:21:01,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:01,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:21:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:21:01,533 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) [2021-11-03 04:21:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:02,569 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-11-03 04:21:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:21:02,581 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 [2021-11-03 04:21:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:02,583 INFO L225 Difference]: With dead ends: 108 [2021-11-03 04:21:02,583 INFO L226 Difference]: Without dead ends: 108 [2021-11-03 04:21:02,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:21:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-03 04:21:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 42. [2021-11-03 04:21:02,592 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) [2021-11-03 04:21:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-03 04:21:02,593 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-11-03 04:21:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:02,594 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-03 04:21:02,594 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) [2021-11-03 04:21:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-03 04:21:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:21:02,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:02,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:02,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:02,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:02,808 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)] === [2021-11-03 04:21:02,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-11-03 04:21:02,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:02,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199684679] [2021-11-03 04:21:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:02,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:02,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:02,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:02,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:21:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:21:02,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:02,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:03,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:03,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199684679] [2021-11-03 04:21:03,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199684679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:03,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:03,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:21:03,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714697323] [2021-11-03 04:21:03,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:21:03,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:03,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:21:03,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:21:03,021 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) [2021-11-03 04:21:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:03,110 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-03 04:21:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:21:03,116 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 [2021-11-03 04:21:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:03,117 INFO L225 Difference]: With dead ends: 44 [2021-11-03 04:21:03,118 INFO L226 Difference]: Without dead ends: 44 [2021-11-03 04:21:03,118 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 [2021-11-03 04:21:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-03 04:21:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-11-03 04:21:03,125 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) [2021-11-03 04:21:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-03 04:21:03,126 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2021-11-03 04:21:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:03,127 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-03 04:21:03,127 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) [2021-11-03 04:21:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-03 04:21:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:21:03,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:03,129 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:03,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:03,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:03,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:03,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-03 04:21:03,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:03,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278547267] [2021-11-03 04:21:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:03,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:03,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:03,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:03,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:21:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:21:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:03,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:03,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278547267] [2021-11-03 04:21:03,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278547267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:03,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [432849887] [2021-11-03 04:21:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:03,694 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:21:03,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:21:03,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-03 04:21:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:03,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:21:03,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:03,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:03,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [432849887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:03,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069504784] [2021-11-03 04:21:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:03,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:21:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:03,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:21:04,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 04:21:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:21:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:04,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:04,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069504784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:04,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:21:04,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:21:04,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777931835] [2021-11-03 04:21:04,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:21:04,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:21:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:21:04,253 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) [2021-11-03 04:21:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:04,352 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-11-03 04:21:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:21:04,353 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 [2021-11-03 04:21:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:04,356 INFO L225 Difference]: With dead ends: 75 [2021-11-03 04:21:04,358 INFO L226 Difference]: Without dead ends: 75 [2021-11-03 04:21:04,359 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 [2021-11-03 04:21:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-03 04:21:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2021-11-03 04:21:04,369 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) [2021-11-03 04:21:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-03 04:21:04,377 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2021-11-03 04:21:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:04,379 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-03 04:21:04,379 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) [2021-11-03 04:21:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-03 04:21:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:21:04,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:04,381 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:04,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:04,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-03 04:21:04,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:04,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:21:04,994 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-03 04:21:04,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:04,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112207094] [2021-11-03 04:21:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:04,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:04,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:04,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:05,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:21:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:21:05,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:05,173 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 [2021-11-03 04:21:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:05,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:06,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:06,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112207094] [2021-11-03 04:21:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112207094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:06,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1540407030] [2021-11-03 04:21:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:06,233 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:21:06,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:21:06,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 04:21:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:21:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:06,459 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 [2021-11-03 04:21:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:06,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1540407030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:06,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087905893] [2021-11-03 04:21:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:06,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:21:06,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:07,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:21:07,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 04:21:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:21:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:07,188 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 [2021-11-03 04:21:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:07,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087905893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:07,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:21:07,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-03 04:21:07,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938563955] [2021-11-03 04:21:07,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:21:07,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:21:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:21:07,647 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:09,546 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-11-03 04:21:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:21:09,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2021-11-03 04:21:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:09,549 INFO L225 Difference]: With dead ends: 116 [2021-11-03 04:21:09,549 INFO L226 Difference]: Without dead ends: 116 [2021-11-03 04:21:09,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:21:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-03 04:21:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 58. [2021-11-03 04:21:09,556 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) [2021-11-03 04:21:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-11-03 04:21:09,558 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 10 [2021-11-03 04:21:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:09,558 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-11-03 04:21:09,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-11-03 04:21:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:21:09,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:09,559 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:09,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:09,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:09,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:10,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:10,161 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)] === [2021-11-03 04:21:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 363893197, now seen corresponding path program 1 times [2021-11-03 04:21:10,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:10,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458665832] [2021-11-03 04:21:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:10,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:10,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:10,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:21:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:21:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:10,301 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 [2021-11-03 04:21:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:10,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:14,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:14,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458665832] [2021-11-03 04:21:14,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458665832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:14,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:14,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-03 04:21:14,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772528354] [2021-11-03 04:21:14,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:21:14,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:21:14,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=36, Unknown=2, NotChecked=0, Total=56 [2021-11-03 04:21:14,607 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) [2021-11-03 04:21:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:14,810 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-03 04:21:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:21:14,810 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 [2021-11-03 04:21:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:14,812 INFO L225 Difference]: With dead ends: 57 [2021-11-03 04:21:14,812 INFO L226 Difference]: Without dead ends: 55 [2021-11-03 04:21:14,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2021-11-03 04:21:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-03 04:21:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-03 04:21:14,817 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) [2021-11-03 04:21:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-03 04:21:14,818 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 13 [2021-11-03 04:21:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:14,818 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-03 04:21:14,819 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) [2021-11-03 04:21:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-03 04:21:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:21:14,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:14,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:14,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:15,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:15,027 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 363893999, now seen corresponding path program 1 times [2021-11-03 04:21:15,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:15,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596060805] [2021-11-03 04:21:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:15,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:15,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:15,035 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:15,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:21:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:15,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:21:15,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:15,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:15,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:15,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596060805] [2021-11-03 04:21:15,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596060805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:15,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:15,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:21:15,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783960757] [2021-11-03 04:21:15,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:21:15,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:21:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:21:15,307 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) [2021-11-03 04:21:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:15,374 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-11-03 04:21:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:21:15,375 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 [2021-11-03 04:21:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:15,376 INFO L225 Difference]: With dead ends: 57 [2021-11-03 04:21:15,376 INFO L226 Difference]: Without dead ends: 49 [2021-11-03 04:21:15,376 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 [2021-11-03 04:21:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-03 04:21:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-03 04:21:15,381 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) [2021-11-03 04:21:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-03 04:21:15,382 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 13 [2021-11-03 04:21:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:15,382 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-03 04:21:15,383 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) [2021-11-03 04:21:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-03 04:21:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:21:15,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:15,384 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:15,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:15,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:15,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958577, now seen corresponding path program 1 times [2021-11-03 04:21:15,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:15,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295307331] [2021-11-03 04:21:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:15,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:15,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:15,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:15,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:21:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:21:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:15,772 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 [2021-11-03 04:21:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:15,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:15,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:15,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295307331] [2021-11-03 04:21:15,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295307331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:15,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:15,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:21:15,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157734036] [2021-11-03 04:21:15,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:21:15,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:21:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:21:15,888 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) [2021-11-03 04:21:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:16,014 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-11-03 04:21:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:21:16,015 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 [2021-11-03 04:21:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:16,016 INFO L225 Difference]: With dead ends: 43 [2021-11-03 04:21:16,016 INFO L226 Difference]: Without dead ends: 43 [2021-11-03 04:21:16,016 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 [2021-11-03 04:21:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-03 04:21:16,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-03 04:21:16,018 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) [2021-11-03 04:21:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-11-03 04:21:16,019 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 13 [2021-11-03 04:21:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:16,022 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-11-03 04:21:16,023 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) [2021-11-03 04:21:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-11-03 04:21:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:21:16,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:16,023 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:16,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:16,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:16,224 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2021-11-03 04:21:16,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:16,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238862221] [2021-11-03 04:21:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:16,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:16,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:16,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:21:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:21:16,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:16,423 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 17 treesize of output 16 [2021-11-03 04:21:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:16,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:17,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:17,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238862221] [2021-11-03 04:21:17,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238862221] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 04:21:17,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 04:21:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-03 04:21:17,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278495519] [2021-11-03 04:21:17,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:21:17,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:21:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:21:17,376 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) [2021-11-03 04:21:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:17,984 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-11-03 04:21:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:21:17,985 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 [2021-11-03 04:21:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:17,986 INFO L225 Difference]: With dead ends: 45 [2021-11-03 04:21:17,986 INFO L226 Difference]: Without dead ends: 45 [2021-11-03 04:21:17,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:21:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-03 04:21:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-11-03 04:21:17,990 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) [2021-11-03 04:21:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-03 04:21:17,991 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 13 [2021-11-03 04:21:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:17,991 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-03 04:21:17,991 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) [2021-11-03 04:21:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-03 04:21:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:21:17,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:17,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:18,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:18,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:18,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-11-03 04:21:18,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:18,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881687317] [2021-11-03 04:21:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:18,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:18,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:18,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:18,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:21:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:21:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:18,473 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 [2021-11-03 04:21:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:18,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:19,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:19,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881687317] [2021-11-03 04:21:19,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881687317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:19,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:19,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:21:19,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342981156] [2021-11-03 04:21:19,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:21:19,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:19,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:21:19,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:21:19,391 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) [2021-11-03 04:21:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:20,512 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2021-11-03 04:21:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:21:20,513 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 [2021-11-03 04:21:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:20,514 INFO L225 Difference]: With dead ends: 87 [2021-11-03 04:21:20,514 INFO L226 Difference]: Without dead ends: 87 [2021-11-03 04:21:20,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:21:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-03 04:21:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-11-03 04:21:20,518 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) [2021-11-03 04:21:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-03 04:21:20,519 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 14 [2021-11-03 04:21:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:20,520 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-03 04:21:20,520 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) [2021-11-03 04:21:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-03 04:21:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:21:20,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:20,521 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:20,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:20,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:20,730 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2021-11-03 04:21:20,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:20,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785139423] [2021-11-03 04:21:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:20,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:20,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:20,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:20,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:21:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:20,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:21:20,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:20,944 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 17 treesize of output 16 [2021-11-03 04:21:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:21,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:22,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:22,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785139423] [2021-11-03 04:21:22,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785139423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:22,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471582260] [2021-11-03 04:21:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:22,238 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:21:22,244 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:21:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:21:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:21:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:21:22,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:21:23,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471582260] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:23,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136128984] [2021-11-03 04:21:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:23,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:21:23,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:23,147 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:21:23,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:21:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:21:23,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:23,421 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 17 treesize of output 16 [2021-11-03 04:21:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:23,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:21:24,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136128984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:24,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:21:24,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 21 [2021-11-03 04:21:24,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660759462] [2021-11-03 04:21:24,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 04:21:24,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 04:21:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-03 04:21:24,173 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:26,521 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2021-11-03 04:21:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:21:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 04:21:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:26,522 INFO L225 Difference]: With dead ends: 117 [2021-11-03 04:21:26,522 INFO L226 Difference]: Without dead ends: 115 [2021-11-03 04:21:26,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 04:21:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-03 04:21:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2021-11-03 04:21:26,528 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) [2021-11-03 04:21:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-11-03 04:21:26,529 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 18 [2021-11-03 04:21:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:26,529 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-11-03 04:21:26,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-11-03 04:21:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:21:26,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:26,531 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 04:21:26,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:26,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:26,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 04:21:27,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:27,136 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:27,137 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-11-03 04:21:27,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:27,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962203435] [2021-11-03 04:21:27,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:21:27,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:27,138 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:27,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:21:27,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:21:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:21:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:21:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:27,412 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 [2021-11-03 04:21:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:28,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:29,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:29,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962203435] [2021-11-03 04:21:29,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962203435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:29,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830687021] [2021-11-03 04:21:29,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:21:29,750 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:21:29,752 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:21:29,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 04:21:30,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:21:30,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:21:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:21:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:30,237 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 [2021-11-03 04:21:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:30,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:31,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830687021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:31,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830121507] [2021-11-03 04:21:31,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:21:31,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:21:31,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:31,448 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:21:31,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 04:21:31,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:21:31,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:21:31,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:21:31,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:31,873 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 [2021-11-03 04:21:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:32,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:34,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830121507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:34,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:21:34,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 22 [2021-11-03 04:21:34,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505048644] [2021-11-03 04:21:34,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:21:34,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:34,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:21:34,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:21:34,100 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:40,819 INFO L93 Difference]: Finished difference Result 519 states and 632 transitions. [2021-11-03 04:21:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:21:40,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-11-03 04:21:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:40,824 INFO L225 Difference]: With dead ends: 519 [2021-11-03 04:21:40,824 INFO L226 Difference]: Without dead ends: 519 [2021-11-03 04:21:40,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:21:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-03 04:21:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 106. [2021-11-03 04:21:40,833 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) [2021-11-03 04:21:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2021-11-03 04:21:40,835 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 22 [2021-11-03 04:21:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:40,835 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2021-11-03 04:21:40,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2021-11-03 04:21:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:21:40,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:40,837 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:40,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:41,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:41,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:41,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:21:41,440 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:21:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 1 times [2021-11-03 04:21:41,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:41,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342914723] [2021-11-03 04:21:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:41,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:41,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:41,441 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:41,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:21:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:21:41,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:41,879 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 [2021-11-03 04:21:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:21:42,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:21:44,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:44,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342914723] [2021-11-03 04:21:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342914723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:44,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054143576] [2021-11-03 04:21:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:44,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:21:44,624 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:21:44,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 04:21:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:21:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:45,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:46,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054143576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:46,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83545832] [2021-11-03 04:21:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:46,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:21:46,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:46,867 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:21:46,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-03 04:21:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:21:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:47,393 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 [2021-11-03 04:21:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:21:47,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:21:49,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83545832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:21:49,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:21:49,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11, 10, 8, 9] total 35 [2021-11-03 04:21:49,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885126645] [2021-11-03 04:21:49,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-03 04:21:49,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-03 04:21:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:21:49,438 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) [2021-11-03 04:22:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:04,592 INFO L93 Difference]: Finished difference Result 238 states and 279 transitions. [2021-11-03 04:22:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:22:04,592 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 [2021-11-03 04:22:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:04,594 INFO L225 Difference]: With dead ends: 238 [2021-11-03 04:22:04,594 INFO L226 Difference]: Without dead ends: 238 [2021-11-03 04:22:04,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1115, Invalid=4891, Unknown=0, NotChecked=0, Total=6006 [2021-11-03 04:22:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-03 04:22:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 171. [2021-11-03 04:22:04,603 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) [2021-11-03 04:22:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2021-11-03 04:22:04,605 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 23 [2021-11-03 04:22:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:04,605 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2021-11-03 04:22:04,606 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) [2021-11-03 04:22:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2021-11-03 04:22:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 04:22:04,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:04,608 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:04,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:04,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-03 04:22:05,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:05,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:05,220 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:05,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1156994876, now seen corresponding path program 1 times [2021-11-03 04:22:05,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:05,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310290998] [2021-11-03 04:22:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:05,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:05,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:05,222 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:05,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:22:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:22:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:05,786 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 [2021-11-03 04:22:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 04:22:06,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 04:22:08,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:08,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310290998] [2021-11-03 04:22:08,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310290998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:08,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1260988184] [2021-11-03 04:22:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:08,507 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:08,508 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:08,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 04:22:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:22:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:22:10,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:22:10,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1260988184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:10,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831027354] [2021-11-03 04:22:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:10,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:10,828 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:10,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 04:22:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:22:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:22:12,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:22:12,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831027354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:12,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:22:12,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 9, 7] total 39 [2021-11-03 04:22:12,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931623781] [2021-11-03 04:22:12,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-03 04:22:12,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-03 04:22:12,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:22:12,809 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:44,954 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2021-11-03 04:22:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-03 04:22:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 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 [2021-11-03 04:22:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:44,956 INFO L225 Difference]: With dead ends: 268 [2021-11-03 04:22:44,956 INFO L226 Difference]: Without dead ends: 240 [2021-11-03 04:22:44,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3261 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=1850, Invalid=9922, Unknown=0, NotChecked=0, Total=11772 [2021-11-03 04:22:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-03 04:22:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 231. [2021-11-03 04:22:44,966 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) [2021-11-03 04:22:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 272 transitions. [2021-11-03 04:22:44,968 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 272 transitions. Word has length 34 [2021-11-03 04:22:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:44,968 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 272 transitions. [2021-11-03 04:22:44,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 272 transitions. [2021-11-03 04:22:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 04:22:44,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:44,971 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:44,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:45,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-03 04:22:45,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:45,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:45,575 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:45,576 INFO L85 PathProgramCache]: Analyzing trace with hash -73696953, now seen corresponding path program 2 times [2021-11-03 04:22:45,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:45,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171445948] [2021-11-03 04:22:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:45,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:45,578 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:45,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:22:46,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:46,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:46,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 04:22:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:46,232 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 [2021-11-03 04:22:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:47,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:51,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:51,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171445948] [2021-11-03 04:22:51,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171445948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:51,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [214383439] [2021-11-03 04:22:51,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:51,854 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:51,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:51,868 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:51,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 04:22:52,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:52,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:22:52,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:22:54,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:22:56,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [214383439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:56,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714118440] [2021-11-03 04:22:56,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:56,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:56,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:56,052 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:56,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-03 04:22:56,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:56,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 04:22:56,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:56,955 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 [2021-11-03 04:22:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:58,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:04,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714118440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:04,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:23:04,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13, 12, 15, 14] total 68 [2021-11-03 04:23:04,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713647493] [2021-11-03 04:23:04,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-03 04:23:04,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-03 04:23:04,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2021-11-03 04:23:04,555 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) [2021-11-03 04:23:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:42,681 INFO L93 Difference]: Finished difference Result 718 states and 832 transitions. [2021-11-03 04:23:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-03 04:23:42,681 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 [2021-11-03 04:23:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:42,685 INFO L225 Difference]: With dead ends: 718 [2021-11-03 04:23:42,685 INFO L226 Difference]: Without dead ends: 716 [2021-11-03 04:23:42,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3689 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=2032, Invalid=10400, Unknown=0, NotChecked=0, Total=12432 [2021-11-03 04:23:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-03 04:23:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 639. [2021-11-03 04:23:42,707 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) [2021-11-03 04:23:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 753 transitions. [2021-11-03 04:23:42,710 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 753 transitions. Word has length 42 [2021-11-03 04:23:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:42,711 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 753 transitions. [2021-11-03 04:23:42,711 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) [2021-11-03 04:23:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 753 transitions. [2021-11-03 04:23:42,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 04:23:42,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:42,714 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 04:23:42,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:42,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:43,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:43,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:43,319 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:23:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-11-03 04:23:43,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:43,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894300853] [2021-11-03 04:23:43,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:23:43,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:43,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:43,321 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:43,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-03 04:23:44,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:23:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:23:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:44,373 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 [2021-11-03 04:23:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:45,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:49,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:49,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894300853] [2021-11-03 04:23:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894300853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:49,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465453897] [2021-11-03 04:23:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:23:49,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:23:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:23:49,635 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:23:49,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-03 04:23:52,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:23:52,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:52,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:23:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:52,246 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 [2021-11-03 04:23:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:53,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465453897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:09,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917834907] [2021-11-03 04:24:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:24:09,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:09,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:09,960 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:09,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-03 04:24:20,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:24:20,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:24:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:24:20,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:20,180 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 [2021-11-03 04:24:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:21,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:33,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917834907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:33,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:24:33,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18, 21, 19, 19] total 69 [2021-11-03 04:24:33,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304240476] [2021-11-03 04:24:33,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-03 04:24:33,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:24:33,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-03 04:24:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=3526, Unknown=0, NotChecked=0, Total=4830 [2021-11-03 04:24:33,518 INFO L87 Difference]: Start difference. First operand 639 states and 753 transitions. Second operand has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:26,541 INFO L93 Difference]: Finished difference Result 3879 states and 4589 transitions. [2021-11-03 04:26:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:26:26,544 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 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 [2021-11-03 04:26:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:26,563 INFO L225 Difference]: With dead ends: 3879 [2021-11-03 04:26:26,563 INFO L226 Difference]: Without dead ends: 3879 [2021-11-03 04:26:26,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 204 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3847 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=2635, Invalid=6485, Unknown=0, NotChecked=0, Total=9120 [2021-11-03 04:26:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-11-03 04:26:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 687. [2021-11-03 04:26:26,607 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) [2021-11-03 04:26:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 813 transitions. [2021-11-03 04:26:26,609 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 813 transitions. Word has length 46 [2021-11-03 04:26:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:26,610 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 813 transitions. [2021-11-03 04:26:26,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 813 transitions. [2021-11-03 04:26:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-03 04:26:26,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:26,614 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:26,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:26,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:27,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-03 04:26:27,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:27,229 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:26:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:27,229 INFO L85 PathProgramCache]: Analyzing trace with hash -917791020, now seen corresponding path program 2 times [2021-11-03 04:26:27,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:27,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447195483] [2021-11-03 04:26:27,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:27,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:27,238 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:27,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-03 04:26:28,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:26:28,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:28,488 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 17 treesize of output 16 [2021-11-03 04:26:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 04:26:29,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 04:26:32,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:32,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447195483] [2021-11-03 04:26:32,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447195483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:32,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977868878] [2021-11-03 04:26:32,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:32,820 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:32,821 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:32,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-03 04:26:34,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:34,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:26:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:26:35,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:26:37,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977868878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:37,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946012545] [2021-11-03 04:26:37,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:37,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:37,931 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:37,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-03 04:26:39,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:39,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:26:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:41,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:45,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946012545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:45,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:45,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14, 13, 14, 12] total 65 [2021-11-03 04:26:45,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107718656] [2021-11-03 04:26:45,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-03 04:26:45,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-03 04:26:45,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3798, Unknown=0, NotChecked=0, Total=4160 [2021-11-03 04:26:45,078 INFO L87 Difference]: Start difference. First operand 687 states and 813 transitions. Second operand has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:24,532 INFO L93 Difference]: Finished difference Result 1222 states and 1409 transitions. [2021-11-03 04:27:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-03 04:27:24,534 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 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 [2021-11-03 04:27:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:24,539 INFO L225 Difference]: With dead ends: 1222 [2021-11-03 04:27:24,540 INFO L226 Difference]: Without dead ends: 1183 [2021-11-03 04:27:24,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6108 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=3036, Invalid=19916, Unknown=0, NotChecked=0, Total=22952 [2021-11-03 04:27:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-03 04:27:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 649. [2021-11-03 04:27:24,565 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) [2021-11-03 04:27:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 748 transitions. [2021-11-03 04:27:24,566 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 748 transitions. Word has length 49 [2021-11-03 04:27:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:24,567 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 748 transitions. [2021-11-03 04:27:24,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 748 transitions. [2021-11-03 04:27:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 04:27:24,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:24,568 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:24,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:24,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:24,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-03 04:27:25,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:25,175 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:27:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -557992115, now seen corresponding path program 3 times [2021-11-03 04:27:25,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:25,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731931958] [2021-11-03 04:27:25,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:27:25,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:25,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:25,176 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:25,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-03 04:27:26,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:27:26,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:27:26,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:27:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:26,753 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 [2021-11-03 04:27:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:27:28,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:27:33,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:33,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731931958] [2021-11-03 04:27:33,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731931958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:33,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551457231] [2021-11-03 04:27:33,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:27:33,801 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:27:33,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:27:33,802 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:27:33,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-03 04:27:37,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:27:37,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:27:37,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-03 04:27:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:37,341 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 [2021-11-03 04:27:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:27:41,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:28:04,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1551457231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:04,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84870742] [2021-11-03 04:28:04,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:28:04,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:28:04,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:28:04,606 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:28:04,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-03 04:28:06,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:28:06,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:28:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 04:28:06,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:06,811 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 [2021-11-03 04:28:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:28:08,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:28:16,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84870742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:16,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:28:16,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19, 22, 11, 12] total 60 [2021-11-03 04:28:16,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937343635] [2021-11-03 04:28:16,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-03 04:28:16,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-03 04:28:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2021-11-03 04:28:16,233 INFO L87 Difference]: Start difference. First operand 649 states and 748 transitions. Second operand has 61 states, 60 states have (on average 2.566666666666667) internal successors, (154), 61 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:40,276 INFO L93 Difference]: Finished difference Result 802 states and 923 transitions. [2021-11-03 04:29:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-03 04:29:40,279 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.566666666666667) internal successors, (154), 61 states have internal predecessors, (154), 0 states have call successors, (0), 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 [2021-11-03 04:29:40,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:40,282 INFO L225 Difference]: With dead ends: 802 [2021-11-03 04:29:40,282 INFO L226 Difference]: Without dead ends: 802 [2021-11-03 04:29:40,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 230 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=3113, Invalid=10227, Unknown=0, NotChecked=0, Total=13340 [2021-11-03 04:29:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-11-03 04:29:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 783. [2021-11-03 04:29:40,308 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) [2021-11-03 04:29:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 907 transitions. [2021-11-03 04:29:40,309 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 907 transitions. Word has length 50 [2021-11-03 04:29:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:40,310 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 907 transitions. [2021-11-03 04:29:40,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.566666666666667) internal successors, (154), 61 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 907 transitions. [2021-11-03 04:29:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:29:40,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:40,312 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:40,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:40,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:40,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:40,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:40,929 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:29:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:40,929 INFO L85 PathProgramCache]: Analyzing trace with hash -273652577, now seen corresponding path program 3 times [2021-11-03 04:29:40,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:40,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842359303] [2021-11-03 04:29:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:29:40,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:40,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:40,931 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:40,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-03 04:29:42,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-03 04:29:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 04:29:42,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:42,931 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 [2021-11-03 04:29:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:29:44,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:29:49,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:49,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842359303] [2021-11-03 04:29:49,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842359303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:49,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197442536] [2021-11-03 04:29:49,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:29:49,463 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:29:49,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:29:49,476 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:29:49,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-03 04:29:53,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-03 04:29:53,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:29:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:53,178 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 [2021-11-03 04:29:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:29:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:30:04,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [197442536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:04,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241873879] [2021-11-03 04:30:04,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:30:04,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:04,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:04,551 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:30:04,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-03 04:30:06,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-03 04:30:06,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 04:30:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:07,026 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 [2021-11-03 04:30:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:30:08,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:30:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241873879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:15,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:30:15,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 13, 11, 13] total 38 [2021-11-03 04:30:15,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977442071] [2021-11-03 04:30:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-03 04:30:15,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-03 04:30:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:30:15,158 INFO L87 Difference]: Start difference. First operand 783 states and 907 transitions. Second operand has 39 states, 38 states have (on average 3.5) internal successors, (133), 39 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:57,342 INFO L93 Difference]: Finished difference Result 1035 states and 1194 transitions. [2021-11-03 04:30:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-03 04:30:57,342 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.5) internal successors, (133), 39 states have internal predecessors, (133), 0 states have call successors, (0), 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 [2021-11-03 04:30:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:57,346 INFO L225 Difference]: With dead ends: 1035 [2021-11-03 04:30:57,346 INFO L226 Difference]: Without dead ends: 1035 [2021-11-03 04:30:57,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 358 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=2141, Invalid=6979, Unknown=0, NotChecked=0, Total=9120 [2021-11-03 04:30:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-11-03 04:30:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 888. [2021-11-03 04:30:57,365 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) [2021-11-03 04:30:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1032 transitions. [2021-11-03 04:30:57,367 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1032 transitions. Word has length 68 [2021-11-03 04:30:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:57,367 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1032 transitions. [2021-11-03 04:30:57,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.5) internal successors, (133), 39 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1032 transitions. [2021-11-03 04:30:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 04:30:57,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:57,370 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:57,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:57,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:57,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-11-03 04:30:57,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:57,984 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:30:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:57,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2060965005, now seen corresponding path program 4 times [2021-11-03 04:30:57,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:57,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703590200] [2021-11-03 04:30:57,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:57,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:57,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:57,986 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:57,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-03 04:31:00,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:31:00,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:31:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:00,241 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 [2021-11-03 04:31:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-03 04:31:01,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:10,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:10,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703590200] [2021-11-03 04:31:10,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703590200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:10,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [664347248] [2021-11-03 04:31:10,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:31:10,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:31:10,093 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:31:10,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-03 04:31:13,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:31:13,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:31:13,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 134 proven. 79 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-03 04:31:16,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 134 proven. 79 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-03 04:31:21,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [664347248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:21,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606587597] [2021-11-03 04:31:21,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:31:21,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:21,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:21,110 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:31:21,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-03 04:31:23,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:31:23,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:23,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 04:31:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:24,024 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 [2021-11-03 04:31:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-03 04:31:26,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-03 04:31:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606587597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:33,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:31:33,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 18, 16, 19, 18] total 95 [2021-11-03 04:31:33,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318287061] [2021-11-03 04:31:33,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-03 04:31:33,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-03 04:31:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=8214, Unknown=0, NotChecked=0, Total=8930 [2021-11-03 04:31:33,775 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) [2021-11-03 04:33:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:00,919 INFO L93 Difference]: Finished difference Result 1281 states and 1462 transitions. [2021-11-03 04:33:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-03 04:33:00,920 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 80 [2021-11-03 04:33:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:00,925 INFO L225 Difference]: With dead ends: 1281 [2021-11-03 04:33:00,925 INFO L226 Difference]: Without dead ends: 1195 [2021-11-03 04:33:00,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7976 ImplicationChecksByTransitivity, 75.7s TimeCoverageRelationStatistics Valid=4997, Invalid=25105, Unknown=0, NotChecked=0, Total=30102 [2021-11-03 04:33:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-11-03 04:33:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1111. [2021-11-03 04:33:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1109 states have (on average 1.151487826871055) internal successors, (1277), 1110 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1277 transitions. [2021-11-03 04:33:00,950 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1277 transitions. Word has length 80 [2021-11-03 04:33:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:00,950 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 1277 transitions. [2021-11-03 04:33:00,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-11-03 04:33:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1277 transitions. [2021-11-03 04:33:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 04:33:00,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:00,953 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:00,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:01,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:01,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-11-03 04:33:01,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:01,560 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:33:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1807772298, now seen corresponding path program 4 times [2021-11-03 04:33:01,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:01,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974120826] [2021-11-03 04:33:01,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:33:01,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:01,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:01,562 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:01,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-03 04:33:04,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:33:04,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:33:04,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 04:33:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:04,243 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 [2021-11-03 04:33:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 4 proven. 303 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-03 04:33:06,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 24 proven. 283 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-03 04:33:10,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:10,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974120826] [2021-11-03 04:33:10,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974120826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:10,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1333095697] [2021-11-03 04:33:10,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:33:10,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:10,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:10,900 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:10,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-03 04:33:14,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:33:14,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:33:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:33:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 172 proven. 103 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-03 04:33:16,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 172 proven. 103 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-03 04:33:19,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1333095697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:19,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873708345] [2021-11-03 04:33:19,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:33:19,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:33:19,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:33:19,158 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:33:19,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-03 04:33:22,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:33:22,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:33:22,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:33:22,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 172 proven. 82 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-03 04:33:24,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 244 proven. 28 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-03 04:33:28,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873708345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:28,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:33:28,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15, 14, 14, 13] total 74 [2021-11-03 04:33:28,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366218466] [2021-11-03 04:33:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-03 04:33:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:28,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-03 04:33:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=4914, Unknown=0, NotChecked=0, Total=5402 [2021-11-03 04:33:28,226 INFO L87 Difference]: Start difference. First operand 1111 states and 1277 transitions. Second operand has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 74 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:39,152 INFO L93 Difference]: Finished difference Result 2077 states and 2323 transitions. [2021-11-03 04:35:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-11-03 04:35:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 74 states have internal predecessors, (291), 0 states have call successors, (0), 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 88 [2021-11-03 04:35:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:39,160 INFO L225 Difference]: With dead ends: 2077 [2021-11-03 04:35:39,161 INFO L226 Difference]: Without dead ends: 1702 [2021-11-03 04:35:39,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 502 SyntacticMatches, 1 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17090 ImplicationChecksByTransitivity, 119.0s TimeCoverageRelationStatistics Valid=6265, Invalid=49195, Unknown=0, NotChecked=0, Total=55460 [2021-11-03 04:35:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-11-03 04:35:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1429. [2021-11-03 04:35:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1427 states have (on average 1.1317449194113525) internal successors, (1615), 1428 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1615 transitions. [2021-11-03 04:35:39,202 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1615 transitions. Word has length 88 [2021-11-03 04:35:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:39,202 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 1615 transitions. [2021-11-03 04:35:39,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 74 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1615 transitions. [2021-11-03 04:35:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 04:35:39,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:39,205 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:39,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:39,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:39,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:39,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:39,832 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:35:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1987259542, now seen corresponding path program 5 times [2021-11-03 04:35:39,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:39,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093190247] [2021-11-03 04:35:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:35:39,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:39,834 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:39,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-03 04:35:43,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-03 04:35:43,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:35:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-03 04:35:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:43,980 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 [2021-11-03 04:35:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 86 proven. 284 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 04:35:46,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:02,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:02,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093190247] [2021-11-03 04:36:02,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093190247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:02,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604784183] [2021-11-03 04:36:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:36:02,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:02,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:36:02,622 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:36:02,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aca616-2d72-45bf-81b0-86712c9dabb8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process